# Simplify I am using parenthesis to separate , if i write the whole prob as is, it runs together a + 9 (3a - 18) _____ ________ 36 - a^2 (3a + 27) possible answers i can choose from 1

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Simplify I am using parenthesis to separate , if i write the whole prob as is, it runs together a + 9 (3a - 18) _____ ________ 36 - a^2 (3a + 27) possible answers i can choose from 1 ____ a + 6 1 ____ a - 6 - 1 ____ a - 6 - 1 ___ a + 6 I am thinking it is - 1 ___ a + 6 but I ...
2. ### Algebra help needed!

x ^2 + 6x + 9 (x ^2 - 3x) _____________ __________ x (x ^2 - 9) possible answers are 1 ___ x -3 x-3 x + 3 1 ____ x + 3 so far i got 3x(3X-4)/X^3-9....then facotor the denominator...after that cancel out the like terms.. Simplify I am using parenthesis to separate , if i write ...
3. ### Math

Tim’s client wants to sell her house and needs an estimate of its value. To get an initial estimate, Tim averages the sale price of similar homes in the area. He also adjusts the value of each of these homes using a multiplier to take any differences in value into account. ...
4. ### Algebra

When simplifying algebraic fractions, do you simplify things attached by addition/subtraction? EX. 4d-1 _____ 6d Would you be able to further simplify it to: 2d-1 ________ 3d
5. ### Geometry

Simplify (6t to the fifth power) with whole expression in parenthesis to the 2nd pwr.
6. ### Math

I was wondering if I solved these problems right? Simplify the following: 3xy^2 4xz ______ + ______ = 7xyz 2y 3x _____ 5 2(x-1) 3(x^2-4) ______ * ________ = 6(x-2) 4(x+2) 5x-5 ______ 20 x^2-x-6 3(x^2-4) ________ / __________ = (x-3) (x+5) 7x+7 x^2+6x+5 ______________ 21(x-2)
7. ### College Algebra

I posed these one's before but added parenthesis which I think made it confusing as the actually questions do not have them. So, I'm reposting them without to see if it makes sense. If not I understand. 1. Compute as indicated. Write your answer in lowest terms. a+3/a^2-4-a+5/...
8. ### College Algebra

I posed these one's before but added parenthesis which I think made it confusing as the actually questions do not have them. So, I'm reposting them without to see if it makes sense. If not I understand. 1. Compute as indicated. Write your answer in lowest terms. a+3/a^2-4-a+5/...
9. ### Math

Simplify the following expression. x+3 1 xsq2-x-6 ____ + _____ +________ x-3 x+3 xsq2-9
10. ### algebra

How do you simplify this expression, assuming all variables are positive? (3a^1/2b^1/3)^2 The carrot symbol represents exponents. It is a^1/2 and b^1/3, just so you know. Square each term in the parenthesis. 3^2 = 9 (a^1/2)^2 = a (b^1/3)^2 = b^2/3 Put it all together: 9 a b^2/...
11. ### bibliography

I'm writing an essay and I know after a quote, you write the author's name in parenthesis. however, i'm using a quote from a website, the article doesn't have an author. it is a website that just states statistics about my topic and issues and problems. so what would i put in ...
12. ### Chemistry

Another fill in the blank Show the chemical reaction equation for the process known as photosynthesis by filling in the blanks below ________+______+________ ---> _____+________ search for photosynthesis reaction on Google.
13. ### Math

Andrea received 4 orders, each for 2 tiles and 6 pieces of edging. Write an expression for 1 order. HINT: _______x^2 + _______ Write an expression for the 4 orders. ______(_____x^2 + ________) Use the distributive property to find the total of 4 orders. ______(_______x^2 + ...
14. ### math

5 + _____< 15, 19 - _____ < 12, and 27 + _____ > 30... need to find 3 whole numbers that make each of these number sentences true.
15. ### algabra

What is an expression to simplify using at least three of the following? Groupings: Parenthesis, brackets, or braces Exponents Multiplication or division Addition or subtraction
16. ### chemistry

Balance these nuclear equations. Can some please help I don't understand these at all 1. 35/17 Cl + 1n -> 35/16S + _____ 2. 229/90 Th -> 4/2 He + ______ 3. 20/8 O -> 20/9F + ________ 4. 54/26Fe + 1n -> 1H + _______ 5. 104/47Ag -> 0/-1e + ______ 6. ________ + 0/-...
17. ### Algebra 2 ...

* Simplify. a to the power of 4/3 times c ^1/6 all over 9b^3..... everything is in the parenthesis and is raised to the power of -2....times the whole thing to, a to the power of 3 times b to the power of two all over 3c.... everything is in the parenthesis and is raised to -1...
18. ### geometry

prove: the segment joining the midpoints of the two sides of a triangle is parallel to the third side. the coordinates are A(0,0)B(a,0)on the the x axis, and C(c,d), M is midpoint and the coordinates of M is (c/2,d/2) and N is also a midpoint whose coordinates are (a+c/2, d/2...
19. ### Algebra 1

You can mow your whole lawn in 45 minutes, and your neighbor can mow your whole lawn in 30 minutes. How long would it take you to mow the lawn together? Clearly show and explain each step for full credit. Using rational applications A. Write an equation that could be used to ...
20. ### Grammar and Composition

please check: Decide what number or description is indicated by the capitalzied words by using your knowledge about prefixes. 1. Our group sat in a SEMICIRCLE. half circle 2. An OCTOPUS has _____ arms. eight 3. Our city celebrated its SESQUICENTENNIAL. 150 years 4. A DECATHLON...
21. ### algebra

How do you simplify (4x^3y^5)^2? are you using the carrots for symbolising "the power of..." or fractions? if i know what your using them for then i can help you. yes. 3^2=9 okay. then it would help to put the exponents out of the parenthesis: (((4x)^3y)^5)^2 remember that ...
22. ### math

ennifer runs a restaurant that offers a children's menu. This past week, 24 children ate at her restaurant, and 8 of them ordered macaroni and cheese. What is the experimental probability that the next child to eat in Jennifer's restaurant will order macaroni and cheese? ...
23. ### Chemistry Lab

Complete the table below: The hydrogen emission spectrum has four series (or sets) of lines named Balmer, Brackett, Paschen, and Lyman. Indicate the energy (infrared, ultraviolet, or visible), the nf value for each series, and all possible ni values up to 7. ( Separate the ...

25. ### Spanish

La Señora González es _____. Usted es _____. Pepito es _____. Carlos es _____. Marta es _____. Yo soy _____. Tú eres _____. Pedro es _____.
26. ### SS

For questions 1-10 choose the letter of the answer that matches the description. Not all letters will be used. A. sectionalism B. Missouri Compromise C. Andrew Jackson D. John C. Calhoun E. Articles of Confederation F. cabinet G. tariff H. treason I. Daniel Webster J. ...
27. ### Math!!

You work in retail. In the past you inventoried and shelved the weekly UPS shipment in 2 hours. Your co-worker usually takes 3 hours to do the UPS shipment. How long will it take the two of you working together to finish this week’s UPS shipment? 1)What units are you looking...
28. ### science

I put a peice of copper into a flame and I need to write a word equation for it. Whats a flame made up of cause I wanna write copper + _____ -> _______ + ________ I know its a synthesis reaction.
29. ### vocab.

1. The lake's reflection usually creates a glare, but now the surface is _________. murky 2. Sad sounds of his ______ show how much he regrets the tragedy. lament 3. When prey is scarce, a carnivore will ________ whenever it can. gorge 4. The warriors agreed that the attack ...
30. ### math

Jennifer runs a restaurant that offers a children's menu. This past week, 24 children ate at her restaurant, and 8 of them ordered macaroni and cheese. What is the experimental probability that the next child to eat in Jennifer's restaurant will order macaroni and cheese? ...
31. ### Algebra 1

Plz help me with the following problems. Simplify. 5^-1(3^-2) Simplify. mn^-4/p^0q^-2 Write a scientific notation. 0.0042 Write in standard notation. 6.12*10^3 Simplify. Write in scientific notation. 0.5(8 * 10^5) Simplify. Write in scientific notation. (9 * 10^-3)^2 Evaluate ...
32. ### Math

Will runs 6 laps before Megan joins him at the track. They then run together at the same pace. Represent the relationship between the number of laps Will runs + Megan runs.
33. ### Algebra class!

WEEK 5 - Work Rates You work in retail. In the past you inventoried and shelved the weekly UPS shipment in 2 hours. Your co-worker usually takes 3 hours to do the UPS shipment. How long will it take the two of you working together to finish this week’s UPS shipment? 1)What ...
34. ### Algebra 1

Simplify the difference (-7p^4+4p^3+6)-(3p^3-5p+3) I removed the parenthesis and changed the addition and subtraction signs to their opposites on the second set; -7p^4 + 4p^3 + 6 - 3p^3 + 5p - 3. When I combined the like terms, I was able to simplify the polynomial to p^3 + 5p...
35. ### math

On the first day he runs 1.5 km. Every day he runs 10% more than the day befor. a) Write down the distance he runs on the second day of training. ..... 1,5km +0,15 = 1,65 km b) Calculate the total distance He runs in the first seven days of training. When I counted my answer ...
36. ### ALGEBRA 2 help please would appreciate

x x _____ - _____ = x^2+9 ________ x+3 x-3 X^2-9 solve for x. and check answer thank you show work please
37. ### Algebra

1. LCM of 15x^7 and 45x^7 2. Marla can shovel the driveway in 60min and Bill can do it in 45min how long would it take them to do the job together? 3. Divide and simplify: x^2-4/x divided by x+2/x+8 4. add and simplify: 5/49z^3 + 1/35z^2 5. simplify by removing factors of 1 y^...
38. ### Algebra

Can you please check my work? You have helped other students I know. Thank you:) Multiply -7(2a2 -4) = -14a2 + 28 Multiply 0.5(a + b -5) = 0.5a + 0.5b - 2.5 Factor bx - by + bz = b(x - y + z) Combine like terms (simplify) 12x + 4 - 11y - 6x - 9 - y = 6x - 12y - 5 Evaluate the ...
39. ### Chemistry

. A student mixed the following reactants, using the general procedure for the experiment: 10.0 mL of 0.10 M KI, 10.0 mL of 0.0010 M Na2S2O3, 20.0 mL of 0.040 M K2S2O8, and 10.0 mL of 0.10M HCl. It took about 75 seconds for the mixture to turn blue. a. By using the dilution ...
40. ### algebra

* Write an expression that simplifies to 5. Use the multiplication, division, addition, and at least one set of parenthesis. Explain the process you would use to simplify the expression.
41. ### Algebra (check my answers)

Please check these answers. Multiply -7(2a2 -4) = -14a2 + 28 Multiply 0.5(a + b -5) = 0.5a + 0.5b - 2.5 Factor bx - by + bz = b(x - y + z) Combine like terms (simplify) 12x + 4 - 11y - 6x - 9 - y = 6x - 12y - 5 Evaluate the expression 3x2y when x = 3 and y = 5 Answer: 135 ...
42. ### math

when dealing with sigma notation, if i enclose my formula with parenthesis,does it make it different from a formula with no parenthesis? plz help, I saw this in regents prep webpage and I just didn't see any difference, but they say that the parenthesis changes the result.
43. ### General Chemistry

A student mixed the following reactants, using the general procedure for the experiment: 10.0 mL of 0.10 M KI, 10.0 mL of 0.0010 M Na2S2O3, 20.0 mL of 0.040 M K2S2O8, and 10.0 mL of 0.10M HCl. It took about 75 seconds for the mixture to turn blue. a. By using the dilution ...
44. ### ms.sue

can you give me an easy way how to find percentages these ways: _____% of ___?_____ = ___?____ __?___ of ________=_________
45. ### Math To: Reiny

This is one whole question: (12) (10xy^3) (3x^2y^2) (5x) (2y) I don't know how to do any of these: simplify sqaure root of 160000 simplify sqaure root of 0.04 simplify 3 * square root 81 simplify square root of 900 simplify square root of 0.0025 simplify [(a^2bc^4)(ab^3c^2)]^2...
46. ### Spanish

Hi Sra! Could you please check my answers on these questions? 1) -Como quiera. Mientras Ud. ______ un sobre, yo limpiaré el compartimento. (MIRAR / BUSCAR) - Busque 2) Pero, por favor, antes de que Ud. se ________, (IR / VER) - Vayas 3) Cuando llegues (8) _____, ven (9) _____...
47. ### math

write the missing numbers to make the sentence true 4+2+6=_____ , 7+9=_____+7, 3+5+3=_____+5
48. ### chemistry

how could you separate iron, sand and salt that has been mixed together with only using a filter, a magnet, and a Bunsen burner?
49. ### Math

Using the digits 1 through 9 complete the following number sentence ___ \ _____ x ____ +_____x_____x____ \ _____ + ____x _____=100
50. ### math

7y-49 / y-7 _____ _____ 4 14y divide and simplify
51. ### Algebra

simplify k+5 _____ 30k _______ 5k-1 _____ 6k
52. ### Math using quadratic equation

The freight train runs 12miles per hour than a passenger train. It runs 65miles in the same time that the passenger train runs 165miles find the rate of each train. I don't really know the formula using quadratic im sorry
53. ### math

the probabilities that 3 friends A,B andC pass a driving test are1/3,1/4,2/5 respectively.All 3 take the test find the probability that(a)aa 3 failed the test (b) only B passes the test(c) only 2 of them pass the test (d)at least 1 passes the test... I will do one. Assuming ...
54. ### Algebra 2....

Simplify.(Is this problem more clear than the previous post?) First part.. a^4/3 times c^1/6 all over 9b^3...everything is in the parenthesis and is raised to the power of -2 MULTIPLY TO THIS SECOND SET: a^3 times b^2 all over 3c.. everything is in the parenthesis and is ...
55. ### spanish

Fill in the blank using the past of hacer or dar as needed so that each sentence makes sense. (1) Nosotros le ________ dinero. (2) Yo le __________ __ un regalo. (3) Tú le _________ ___ el lápiz. (4) Ellos ________ __ una película. (5) Yo __________ __ la tarea. (6) Ellas ...
56. ### Spanish

Can someone plz fill in the blanks for me i can't find the cd and its due tomorrow??!!!!!!PLZZZZ En la 11.________ te llamé. De la oscuridad me llamaste. Reconocí tu 12.______. Reconociste la mia. "Vente para acá,"13.______. Respondiste: "¿Dónde estás, papá? No te 14.__...
57. ### English

1) How many U.S. presidents can (you) name? (2) In the year 2000, U.S. citizens elected the 43rd (president). (3) Some presidents (were elected) more than once. (4) Franklin Roosevelt, for example, was elected to four terms (in office). (5) Many citizens would have given (him...
58. ### LA

1) How many U.S. presidents can (you) name? (2) In the year 2000, U.S. citizens elected the 43rd (president). (3) Some presidents (were elected) more than once. (4) Franklin Roosevelt, for example, was elected to four terms (in office). (5) Many citizens would have given (him...
59. ### alg

ken griffy jr hit 23 home runs in the first 50 games of the season. If he hit homw runs at this pace all season, how many would he have at the end of the year? aSSUME A 168 games schedule. Round your answer to the nearest whole number of home runs.
60. ### spanish

Fill in the blank using the past of hacer or dar as needed so that each sentence makes sense. 1-Nosotros le ________ dinero. 2-Yo le __________ __ un regalo. 3-Tú le _________ ___ el lápiz. 4-Ellos ________ __ una película. 5-El me ________ ____ \$10 dólares My Answers: 1. ...
61. ### maths

Suppose you have \$9000 to invest and you invest part of it (\$×) in a high risk venture at 11.5% per annum and the remainder with the bank at 4.5% per annum, both for one year. 1) write an algebraic expression for the amount of money invested at 4.5% 2) write an algebraic ...
62. ### English

How should I write the following sentence? (Choose the correct word in the parenthesis): Also, do you think the rest of the sentence is put together properly and makes sense. If not, can you help me fix it? 1. Joseph Paul DiMaggio was born (on/in) November 25, 1914 (in/on) ...
63. ### Probability and statistic

Suppose X has an exponential distribution with mean equal to 13. Determine the following: (a) Upper P left-parenthesis x ⁢ greater-than 10 right-parenthesis (Round your answer to 3 decimal places.) (b) Upper P left-parenthesis x ⁢ greater-than 20 right-parenthesis...
64. ### Algebra

simplify: X - - 2x-5 ___ 4 ______ x-3 x + 2 Sara, use parenthesis, like this: x/(x-5) + (3x+6)/(x+2)
65. ### algebra

Solve. x/9-1/7=26/63 STEP 1: The LCM is _________ To clear denominators, multiply each side of the equation by the LCM. _______/1 (x/9-1/7)=__________/1 multiply 26/63. STEP 2: Use the Distributive Property. _____/1 multiply x/9 - _________/1 multiply 1/7 = ______________. ...
66. ### math

Use the formula S equals 2 left-parenthesis l w right-parenthesis plus 2 left-parenthesis l h right-parenthesis plus 2 left-parenthesis w h right-parenthesisto find the surface area of a rectangular prism with the following dimensions: length = 2 cm width = 3 cm height = 4 cm...
67. ### math

A.) write the rational expression as an equivalent expression whose denominator is the given polynomial. 1.) 6/7x^2y = ________/49x^3y^2 B.) perform the indicated operations, simplify if possible. 2.) x^2-3x-4/x^2-16 x x+4/3x-9
68. ### vocab.

Words to Know affliction cowering fetter gorge infamous lament livid loathsome murky pilgrimage purge relish talon taut writhing 1. The lake's reflection usually creates a glare, but now the surface is _________. murky 2. Sad sounds of his ______ show how much he regrets the ...
69. ### English Song

( Is this called 'open parenthesis'? ) Is this called 'close parenthesis'? Or is this called 'closed parenthesis'?

71. ### math, correction,plz

Can someone correct these for me..plz... Problem #1 simplify. ((p^5)^4)/(p^6) MY answer: p^14 Problem #2 Write using positive exponents only. b^-6 MY answer: (1)/(b^6) Problem#3 Write 1.81 X 10^-2 in standard notation My answer. 0.0181 Problem #4 Subtract 2x-3x^2+5x^3 from 5x^...

Simplify & write the answer using positive exponents: 1. (3^3)(3^-6) 2. S^2 t^-1 / (s^4 t^4)^1/2 Simplify then evaluate, express answer to 4 decimal places where nessasssary : 3. [(2/3)^2]^-3 4. [(1-4)^-3 Divide (1/4)^2]^-2
73. ### stats

a test consists of 25 multiple choice questions. Each has 5 possible answers, which only one is correct. If a student guesses on each question, find the following: a) prob that he will guess all of them right b)prob that he will guess at most 12 right c) prob that he will ...
74. ### English

Identify the gerund and gerund phrases in the following sentences. 1. A catamaran is a sailboat made by joining two separate hulls together. GP= joining two separate hulls together, G=joining 2. Leaving a little space between the two hulls is important. GP= Leaving a little ...
75. ### Chemistry

3Ca(CH3COO)2(aq) + 2H3PO4(aq) ¨ Ca3(PO4)2(aq) + 6CH3COOH (aq) reduce in net ionic form... how do you know what to separate? for example, how would i know to separate Ca and PO4 or to keep it together??
76. ### biology

When chromatids separate during anaphase two (in meiosis), do all the maternal and paternal chromatids stay together or do they randomly separate into the daughter cells?
77. ### english

i have to make analogys for my vocab words and i need help apex:peak;________:__________ Assimilate:_____;_______:_________ interim:interval;_____:_______ and also for Meander,metropolis,momentous,obstrepous,pensive perilou'shoddy,surly,and tirade
78. ### Chem1020

Consider the following balanced equation. 2N2H4(g)+N2O4(g)→3N2(g)+4H2O(g) Complete the following table, showing the appropriate number of moles of reactants and products. If the number of moles of a reactant is provided, fill in the required amount of the other reactant, as ...
79. ### algebra

raise the quantity in parenthesis to the indicated exponent and simplify. (-16x^-2y^3)^2 __________ 80x^-2y^3
80. ### Math

Use properties of exponents to re-write the expression using positive powers: x^6y^-6 = ________
81. ### algebra

Simplify 3x to the 4th times yto the 5th over9xy toto the7th all in parenthesis

1. What steps in meiosis are similar to steps of mitosis? (1 point) meiosis I prophase meiosis I anaphase meiosis I metaphase all of the above 2. A cell that has two of every kind of chromosome is _____. (1 point) haploid diploid an egg a sperm 3. Haploid numbers of ...
83. ### Math

Solve the following 2w^3 4c^3t^2 _____ - ________ 9c^3d^3 3b^2d^2
84. ### Math

Use sets to verify that 8>6. Here is how I answered this question: I will use sets A and B with eight and six elements. A={8,7,6,5,4,3,2,1} B={6,5,4,3,2,1}. Using the symbol 8 to represent n(A) and the symbol 6 to represent n(B), I will write 8>6 (read eight is greater ...
85. ### english

consonant patterns wr,kn,st,mb,gn directions read each word and idenify the consonant pattern with the silent letter. on the lines,write two more words that have the same silent consonant pattern. underline the consonant pattern in each word you write. 1- write _______ ...
86. ### spanish

can someone please explain this to me? its the irregular verb estar. 1. Yo_____ en mi casa (in my house). 2. Jose, María, y yo _________ alegres. 3. Mario, tú, y yo __________ en el cine (at the movies). 4. El perro ________ en el parque (at the park.) 5. Usted _________ ...
87. ### Science need help ASAP!

The closer together magnetic field lines are, the _____ the magnetic force. closer farther stronger weaker Magnetic poles always exist in north-south poles. true*** false A(n) _____ is an electric circuit that produces a magnetic field. magnetic battery electromagnet coil ...
88. ### Math

Use sets to verify that 8>6. Here is how I answered this question: I will use sets A and B with eight and six elements. A={8,7,6,5,4,3,2,1} B={6,5,4,3,2,1}. Using the symbol 8 to represent n(A) and the symbol 6 to represent n(B), I will write 8>6 (read eight is greater ...
89. ### Algebra

A veterinarian uses 300 feet of chain-link fencing to enclose a rectangular region and also to subdivide the region into two smaller rectangular regions by placing a fence parallel to one of the sides, as shown in the figure. (a) Write the width w as a function of the length l...
90. ### Precalculus

Every point in the plane has exactly two polar coordinates. A)The statement is true because every point in the plane has a unique polar representation. B)The statement is false because left parenthesis r comma theta right parenthesis equals left parenthesis r comma theta plus ...
91. ### math

Using the numbers 2,3,5,10,24 write two separate equations that equal 120
92. ### math help pls

1. Evaluate 6r + 7 for r = 1.2. (1 point)0.2 7.2 13 14.2 2. Write an algebraic expression for “Julie runs three miles less than twice the number of miles, n, that Hannah runs.” (1 point)2n – 3 3n – 2 2n + 3 3n + 2 3. Solve 5s + 40 = 55 using number sense. (1 point)3 15...
93. ### Math

Using only 7,6,5 and 3 once, how can I make the number 75? Using division, multiplication, adding and subtracting. With parenthesis!!
94. ### Math help Ms. Sue please

1. Name the subset(s) of real numbers to which the number zero belongs. You can choose more than one answer. Irrational numbers Integers Whole numbers Natural numbers 2. Write an algebraic expression for the word phrase: the quotient of r and 12. r * 12 r + 12 r / 12 r - 12 3...
95. ### math

Evaluate the expression for x = -2 and y = 1.5. Write your answer as a decimal or whole number. so x = -2 and y = 1.5, then simplify. xy + x -2(1.5) + -2 -3 + -2 -5 ? Correct? Or no? Also, what are the causes of getting banned from this website?
96. ### Math

In a survey of 204 people, the following incomplete information was recorded relating gender to color-blindness: Complete the table on a separate sheet of paper, then complete Parts (a) - (d). There are no required fill-ins within the table. Color-Blind Not Color-Blind Total ...
97. ### Math (pt 2)

Sorry! I posted only the beginning of this question before. Here's the whole thing. Write an equation to express y in terms of x. X 1 __(blank) 3 4 5 Y 7 12 17 22 __(blank) y = ________(blank) I don't understand this one. Can someone please help????
98. ### english

NOMINAL CONFISCATE CONSTITUTE DECIPHER DEFAULT HYPOTHETICAL CONCURRENT PREDOMINANT PREREQUISITE RECESSION 1-2. This summer, local children can sign up for art or music lessons for a _____ fee of \$ 3.00. It’s impossible to take both, though, since the classes will be _____ . ...
99. ### AP Spanish

Write the definitie article (if necessary). Use parenthses if the article is optional. 1. Aprendo _____ japones. 2. _____ Africa es grande. 3. Esta en _______ carcel. 4. Que es _____ quimica? 5. Come ____ almuerzo.
100. ### last algebra question

P((1 + r)^2)^3 To simplify this expression would I distribute first or square the parentheses and tehn cube the numbers in the parenthesis?