# In my math question it says: Multiply. Simplify before multiplying. Use benchmarks to estimate to check the product is resonable. a)3/4 x 8/5 is one of the equations What are benchmarks?

253,976 results

### URGENT: Grade 8 Math

In my math question it says: Multiply. Simplify before multiplying. Use benchmarks to estimate to check the product is resonable. a)3/4 x 8/5 is one of the equations What are benchmarks?

### math

Estimate 99 9/19 + 1/5, Use benchmarks to estimate the total

### PLEASE CHECK OPERATIONS WITH FRACTIONS

1. 619.5 km=__m A, 0.6195 B, 61.95 C, 61,950 D, 619,500*** Write the metric unit that makes the statement true. 2. 5,941 mm= 5.941__ (1point) A, m*** B, km C, cm D, dm Use benchmarks to estimate the sum, difference, or product. 3. 1 7/8+1/9 A, 0 B, 1 C, 2 D, 2 1/2*** 4. 8 8/9...

### math7A

use benchmarks to estimate the sum or difference 4\5+8\9

### Use benchmarks to estimate the sum, difference, or

I need help with these 1. 1 7/8 + 1/9 2. 5 2/11 -3 2/18 3. 8 2/17 x 1 15/17 4. 2/9 + 4/9 5. -5/6 + 4/18 6. 11 5/9 + 10 1/3 7. -1/5 + (-3/7)

### Math HELP!

Use benchmarks to estimate the sum, difference, or product. 1.) 1 7/8 + 1/9 0 1 2 2 1/2 2.) 8 8/9 - 5 1/11 4 5 14 11 3.) 7 2/3 x 3 7/9 2 3/27 11 4/9 28 26/27 21 14/27 4.) Walter had 2/4 yard of string. He used 1/2 of the string for a school project. How many yards of string ...

### Math estimate with benchmark

Could you please check ifI have these right? i need to estimate using benchmarks (show work) 1/8 + 3/5 i got: 0 + 1/2 = 1/2 _________________ 4 3/4 - 1 2/3 i got: 4 +1 = 5 - 1 +1 = 2 so 5 - 2 = 3 _____________________ 43 7/8 divide 10 1/3 43 + 1 = 44 10 +0 = 10 so 44 divide by...

### math

Write the number that makes the statement true. 1. 205.5 m = _____ mm (1 point) 205,500 0.2055 20.55 20,550 2. 199.2 km = _____ m (1 point) 199,200 19.92 19,920 0.1992 Use benchmarks to estimate the sum. 3. + (1 point) 2 1 0 Estimate the difference. 4. 6 – 4 (1 point) 2 3 1 ...

### Estimating DecimalsProducts and Quotients

Determine whether each product or quotient is resonable.If not resonable,find a resonable result. 1. 62.77(29.8)=187.0546 2.16.132/2.96=54.5 The numbers are correct except for the decimal places. The first one looks like 60*30 or 1800, so determine where the decimal should be...

### Math

Use benchmarks to estimate each sum or difference. 4/5 + 8/9 a. about 1 1/2 b. about 1 3/4 c. about 1 8/9 -------- d. about 2

### math

1. use benchmarks to estimate the sum. 11/15 + 1/8 A. about 1/2 B. about 3/4 C. about 1 D. about 1 1/2

### math

Use benchmarks to estimate the sum. 1. 11/15+1/8. A:about 1/2 B:about 3/4 C:about 1 D:about 1 1/2

### Halp me or i fall

Write the number that makes the statement true. 1. 205.5 m = _____ mm (1 point) 205,500 0.2055 20.55 20,550 2. 199.2 km = _____ m (1 point) 199,200 19.92 19,920 0.1992 Use benchmarks to estimate the sum. 3. + (1 point) 2 1 0 Estimate the difference. 4. 6 – 4 (1 point) 2 3 1 ...

### Math

I need help with this question: Estimate the product by rounding to the nearest one 6.38 times 18.716 I said on my assignment 120 and my teacher marked it wrong. She said it's 114, and I donot see how it's 114. Any input, would certainly be welcome. Thank you! By rounding to ...

### Math

Explain how u can write 35% as a sum of 2 benchmarks percents or as multiple of a percent? PLEASE TELL ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!:)

### algebra

Need some one check my homework. Evaluate 3p/q when p=2 and q=6. Answer:1 Use < > or = for __ to write a true sentence: 0.001 __ 0.0010 Answer:< Question 3 Evaluate -3/8 - 5/8. Answer:7 Question 4 Evaluate: 84 + (-99) + 44 - (-18) - 43 = Answer:4 Question 5 Multiply...

### math

how do i do x2+12x+32 x2+12x = 14x+32 subtract 14x from each side 14x=32 divide by 2 7x=16 x=16/7, which is 2 and 2/7 ok maybe you typed that question wrong? is it x^2 + 12x + 32 ? if it is then the solution is: (x+8)(x+4) because when you multiply them you use foil; so ...

### 5th grade Math

Find the product. Estimate to check. 0.12 X 04 _______ O.108 How do I estimate to check? 0.07 X 9.2 ________ 0.644 How do I estimate to check? 0.848 X 3.2 _________ 2.7136 How do I estimate to check? Choose the better estimate 22 X 0.6 a.(12) b.(1.2) I chose a 2.3 X 4.8 a.(10...

### math-5

Which choice is the answer? Show me please. Tara spent 3 hours doing homework. She spent 1/3 of her time on math, and 1/5 on science. Which method would provide the most reasonable estimate of the totaltime Tara spent on her math and science homework? a. multiply 1/8 by 3 b. ...

### math(help)

for questions 1-2,estimate the sum or difference.use the benchmarks 0,1/2,and 1. 1.23/40-9/30 A.0 B.1 C.1/2 2.simone measures the width of one cardboard strip as 1/2 yd.a second cardboard strip measures 5/6 yd in width.estimate the combined width of the cardboard strips. A....

### math-5

Tara spent 3 hours doing homework. She spent 1/3 of her time on math, and 1/5 on science. Which method would provide the most reasonable estimate of the totaltime Tara spent on her math and science homework? a. multiply 1/8 by 3 b. multiply 1/2 by 3 c. multiply 1/3 by 3 and ...

### Algebra

40 =15 x x - 20 This is a three part question>> first find the lcd method of solving this equations, and the second ones about cross-multiplying method to solve this equations ,The next question asked would the cross- multiplying method work for all rational equations?? ...

### math,algebra

Use the five properties of exponents to simplify each of the following expressions (y^5)^3(y^3)^2 divided by (y^4)^4 can someone show me how to solve these types of problems (y^5)^3= y^15 multiply the powers (y^3)^2=y^6 multiply the powers again as you have a power raised to a...

### math

How do you multiply decimals If you look at the box up above that says jump, scroll down to the math section. If you select arithmetic you'll see a section on decimals there. That section has a subsection on multiplying them. when you multiply decimals you first have to line ...

### Math

Multiply: Try to recognize the type of product to be multiplying. (x-4x^3)^2

### Calculus

Hello, I would greatly appreciate any help that I can have with the following calculus question below. It has to do with separable differential equations. I'm also going to explain what I've done so far, so please bear with me (but honestly I don't think I've done much). ...

### algebra - please help

Let N(t) be number of bacteria after t days. N(t) = Pa^t for some constants P and a. N(2) = 5400 and N(6)=382,000. a)before working problem, estimate value of N(5). b) write down 2 equations for P and a, one when t=2 and one when t=6, and use these two equations to compute a ...

### Algebra 2

factor each polunomial completely. May I get some help please? x2(squared)-4 1X2-4=1x2+(-4)= -3x? I'm not sure I know how to factor `')brie~ To indicate x squared, use x^2. You need to get the numerical product of 4 without getting a middle x term. This means that the ...

### 4th grade

reena says the product of 54 and 9 cannot be 487. she says that she knows this without actually multiplying. how does she know?

### Math

If we multiply "a" and "b",when will: a. the product be larger than both "a" and "b"? b. the Product be less than "a"? c. the product be less than "b"? d. the product be less than"a" and "b"? e. the product be greater than "a"? f. the product be greater than "b"? g. the ...

### MATH PLEASE CHECK IT!!2

sqrt2/sqrt10 here is what I got: sqrt (2/10)= sqrt (1/5) sqrt 0.2 * I don't think that it is right but pleasee check it.Thanks Yes, that is one way you could do it, then simplify further by taking the square root of 0.2, but you are probably supposed to simplify like this: &#...

### math ,hep, plz

can someone help explain this for me please... Problem #1 What values for x must be excluded in the following fraction? (x+5)/(-1) Problem #2 what values for x must be excluded in the following fraction? (x-3)/((4x-5)(x+10)) When working with fractions, the denominator (part ...

### 6th grade math

how do you estimate a product when multiplying fractions?

### Math Multiplying Fractions

Multiply. Simplify if you can. 2.1/3x2/5=2/15 4.2/5x3/7=6/35 6.1/6x3/5=3/30 8.9/10x4/5=36/50 10.11x3/4=33/4=8 1/4 12.4/9x2/3=8/27

### 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 ...

### A L G E B R A H ELP MS SUE.

I THINK I MAY HAVE DONE MY HOMEWORK WRONG BECAUZE IT SAYS TO : ESTIMATE THE PRODUCT OR QUOTIENT. SO WOULD THAT MEAN TO ACTUALLY DO WORK THEN ESTIMATE THE PRODUCT OR QUOTIENT LIKE FIRST -72 X 57 = -4104 OR ESTIMATE; -4000 ? I AM CONFUSED ABOUT WHAT IM SUPPOSE TO FIND : ...

### easy algebra question, check answer

When multiplying two numbers written in scientific notation, what do you do with the exponents of the 10? a. multiply b. add*** c. subtract d. divide

### Multiplying Polynomials

Use the distributive property to write (each of) the following expression(s) as the sum of monomials. M. (t - 1)(t + 1)(t^2 + 1) I already know that I must multiply across, but I am a bit confused regarding the order to multiply in and which variables to "distribute" or ...

### complex numbers and imaginary units

2i/1+i your question probably says 'simplify' multiply top and bottom by (1-i)\(1-i) and remember that i^2 =-1 so... 2i/(1+i) * (1-i)\(1-i) = (2i - 2i^2)/(1-i^2) = 2(i-i^2)/(1+1) =i+1

### Math Multiplying Fractions

Multiply. Simplify if you can 1. 1/4x5/6= 5/24 2.3/7x3/4= 9/28 3.4x1/5=4/5 4.5/12x2=5/6 5.3/5x10= 6 6.2/3x3/8= 1/4 7.1/7x1/7= 1/49 8.2/9x1/2= 1/9

### physics multiplying vectors

n the product F = qv · B , take q = 4, = 2.0i + 4.0j + 6.0k and = 136i -176j + 72k. What then is in unit-vector notation if Bx = By? ~~may i get some assistance in this problem? so far.. i tried this.. 136i-176j+72k = 4(2.0i+4.0j+6.0k)(B) 136i-176j+72k = (8i+16j+24k)(B) [(...

### 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 ...

### can someone please check if im right : math

4(3x+7) is this the equivalent expression : 12x+28 Yes it is, that' using the distributive property. ok. how do i get the opposite of an expression example : -10t+21 The opposite? Do you mean the negative or additive inverse of the expression? If so then multiply it by -1. ...

### 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 ...

### math

Reasonableness Sun-Yi estimated 270+146 and got 300. Is her estimate resonable? Explain.

### Algebra

I am trying to solve the sytems of equations using the elimination method. 2x+4y=10 -3x+3y=-6 I tied multiplying the first equation by 2 and the second by 4. Then I tried multiplying the first equation by -3 and the secondy by 3. The book says the answers are 3,1. I am not ...

### Math

I am really have a tough time trying to solve this problem. I think my first three steps are correct but I am not sure. Could someone please help me? I got lost somewhere on one of these steps. I thonk it was step 3, 4, 5. Thank you. The two numbers chosen for my solution will...

### 5th grade math

Find The Product. Estimate to check. 0.12 X 0.9 = 10.8 or is it .108? estimate is 12 X 10 =120 Is this correct? Thank you

### algebra - exponentials

My question is how do I know that N increases by a factor of 2.9 each day. (see below) Let N(t) be number of bacteria after t days. N(t) = Pa^t for some constants P and a. N(2) = 5400 and N(6)=382,000. a)before working problem, estimate value of N(5). b) write down 2 equations...

### Algebra

Solve S=a/(1-r) for r S = a/(1-r) Multiply both sides by 1-r S*(1-r) = [(1-r)*a]/(1-r) Simplify S*(1-r) = a Multiply terms on the left. S - S*r = a Subtract S from both sides. S-S*r - S = a - S Simplify -S*r = a - S Multiply both sides by -1 S*r = -a+S Divide both sides by S S...

### MATH STUCK:-(

I am having some difficulties factoring polynomials and I use only one method to figure the stuff out, which is the guess and check method because it's just mental math work and not that complicating. Here is a question that I know how to do, and below it I will list down the ...

### math

carrie says that one solution to y=3x-5 is (4,7).Describe two ways to check if her statement is true.use at least one way to check her answer.

### MATH

How do you write fractions in simplest form? for example I need explanation 48/66 Also I started on another one it states that I have to multiply. and I have to be sure to simplify each product 7/9 x 3/5 My answer: 21/45 I just don't know what goes after this step? to simplify...

### How do I do this.?(Math.)

Use the Substitution method to solve the system of equations. y - 2x = -5 3y - x = 5 Solve one of the equations for x or y. Let's solve the first one for y: y - 2x = -5 y = 2x - 5 Now let's substitute 2x - 5 for y in the second equation to solve for x: 3(2x - 5) - x = 5 6x - ...

### algebra

okay i have to find f(a-2) out of this question f(x)=5x-1 were did the a come from. man i am so confused? "a" is a variable. Like "x" is in most equations. So 5(a-2) - 1 Multiply it out from there and simplify. Matt

### Math

I need help multiplying the fractions out. The question is... x/3 + y/2 = -4 x - 3y = 6 ( x/3 is a fraction ) To rid an equation of fractions, simply multiply everyting (both sides, too) by the denominator. In this case you have two numbers in the denominator so multiply by ...

### math

Estimate then find each product. Simplify 7 4/5×2 1/3 Is the answer 18 1/5

### math

Estimate. Then find each product. Simplify 6 1/3×1:5/6 Is the answer 11 11/18

### math

Simplify (2c)(11c). my answer is telling me it should be 22c. I think it is 22c(squared). We are not combining like terms, but multiplying each to the 1st power. when you multiply you add the exponents. I am confused.

### Algebra

1.How do you factor (-5t^2+50t+5) ? I keep getting (-5)(t-1)(t+1), but when I check it by foiling and multiplying, it doesn't equal the original trinomial. 2. Can I multiply (-3x-2x+8) by (-1) to get rid of the negative coefficient? If I don't, it will be differently factored...

### math

start with 1, multiply by 2. then multiply the result by 3.then continue to alternate multiplying by 2 and by 3.what is the ones digit after the twelfth multiplication

### Math

How do you divide fractions??? Cross multiply: For example, 4/5 divided by 6/7 would be 28/30 or 14/15. 3/4 divided by 2/3 would be 9/8 or 1 and 1/8 Actually, the word cross multiply is a misnomer. What is being done is multiplying by the reciprocal for instance 4/5 divide by ...

### math/multiplying decimals

I know how to multiply ,but i have to use it in a model. 0.2 x 0.7 the answer is 1.4 show my how to use a model to solve.

### lattice math

Why should we estimate before solving a problem? We should estimate before solving a problem to make sure our answer is close to the real answer. Here's a simple problem. Suppose we want to find wnat a 6% tax on a $10 purchase would be. When you do the math, the answer depends...

### Math

My math teacher said to use the FOIL (First Outer Inner Last) property to simplify these quadratic equations I have made from looking at two parabolas. Here are my equations & how would you use the FOIL property on each of the equations and also can someone help me with ...

### Math

The problem to solve is: (x+20)(x-12)(x+4)>0 but I can't figure out how to do this right so I left off the >0 and tried to solve the equation. x+20 evaluates to x+20 x-12 evaluates to x-12 Multiplying x+20 by x-12 is a classic Algebra problem. Here, you are trying to ...

### quick question regarding equations

I know there are methods out there but what do you think is the best or easiest method(s) of solving a system of equations. Depends on the coefficients of the equation. If in one of the equations I can solve for one of the variables without having to express it in fractions, I...

### Math

At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what is...

### Math

At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what is...

### Math

At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what is...

### Math 157

Can someone please help me. At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a ...

### Math

8*2sq+7*(4+1)= ? Can someone explain to me what to after the parenthesis? I mean in the PEMDAS of operations says that I should multiply. Multiply what and when? By the way the actual problem is a example I got out of my book. Right at this momen there is no one problem I am ...

### math multiplying & divding mixed numbers

An estimate for 8 1/6 . 9 3/4 Simplify your answer. Type a whole number, proper fraction, or mixed number

### math multiplying & divding mixed numbers

An estimate for 8 1/6 . 9 3/4 Simplify your answer. Type a whole number, proper fraction, or mixed number

### need guidance on an algebra problem

20 x+3(y-1)=11 2(x-y)+8y = 28 multiply out 20 x+3y-3=11 - Is this correct? 2x+14y = 28 Using the addition method, would you multiply the first problem by 2 and the second by 20? No. In the second multiply out, you should have gotten 2x -1y+8y=28 or 2x+7y=28 No, in the addition...

### Math

Can someone please help me. At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a ...

### math-moneyfractions

i have some math questions that i really ,really,need help with asap if any body can explain some of these questions that will be great help.Ok here are 3 of the questions i am about to type now ok the first one says,whole 16 nickels a.circle 3/a of the nickels b.how much ...

### algebra

(3x^2 - 5x - 6) + (5x^2 +4x + 4) Is says you have to simplify this.. How would you do that? Multiply them together?

### algerbra

i did my question already but i was wondering if someone could double check my work. the question says to graph the following function on the grpah f(x)={|x|, -3 is equal to or less than x less than 2} {2x-8, x less than or equal to 2} i dont know if its possible to show a ...

### someone help

my post is still on this page as algebra, could someone elaborate on what bobpursley tried to help me with. See your original post. I am guessing you are referring to your question 5)Simplify:(5x-4)^2 and your answer= 25x^2 - 16 (5x-4)^2 =(5x-4)(5x-4) = 25x^2 - 20x - 20x + 16...

### Algebra

Simplify 1/r=1/x+1/y Multiply both sides by rxy. Then simplify. I will be happy to check your work. That is as compact and simple as the relationship can be written. Are you looking for an explicit formula for x, y or r?

### math

Please check my answers! Simplify the product. 7x(x+4) A. 7x^2+4 B. 7x^2+28x <<<< C. 8x+4 D. 8x+11 Simplify the product. 4x (2x^3 - 7x^2 + x) A. 8x^4-28^3+4x^2 <<<<< B. 16x^4-7x^2+4x C. 8x^4-7x^2+x D. 16x^4-3x^3+4x^2 I just started learning about ...

### math

a teacher asked her students to think of a number, multiply by 5, and subtract the product from 20 , then she asked them to multiply the resulting difference by the number they first thougt of a) use function notation to express the final answer in terms of the orginal number ...

### math

At a quality control checkpoint on a manufacturing assembly line, 8% of the items failed check A, 10% failed check B, and 2% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what is...

### Math

At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what ...

### Math

At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product failed check B, what ...

### math/117

simplify before multiply explain and show all steps

### Informal Logic

<21{3[2(08)44]}> Surveys show that people who use calorie information to decide which foods to eat consume on average 100 calories less than they would if they didn’t check calorie information before eating. Strangely though, people who use calorie information in this ...

### math

First estimate the answer. Then multiply to find the exact answer. Simplify all answers. 8 1/6 . 9 3/4

### math

First estimate the answer. Then multiply to find the exact answer simplify all answers 4 1/4 • 9 2/3

### algebra

Can some kind soul please assist me with this question? :) Simplify the expression. Use only positive exponents: (4p^2q)(p^2q^3) Bless you! 4 p^4 q^4 Exponents add when multiplying Even when there's two sets of parenthesese?

### Math

Amy is making a drawing of different things in her neighborhood. One house she drew is 30 feet wide. Her scale drawing of the house is 5 inches wide. Which of the following uses the same scale Amy used to draw this house. A 54 foot-tall water tower is represented by a 9-inch ...

### MAT115

Estimate the following product. 6/1/8 * 7 4/5 should I just multiply 6 * 8 to get an estimation?

### 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 = ______________. ...

### math/geometry

complete the statements: To find the length of the hypotenuse of a 45-45-90 triangle, multiply the length of one of the legs by:? Could the answer be .5??? to find the length of the shorter leg of a 30-60-90 triangle, multiply the length of the longer leg by:? To find the ...

### chemistry

Can someone help me finish this equation, please? We're adding Magnesium to Copper sulfate and getting Copper. This is what I have as of now: CuSO4+Mg===>Cu I'm guessing it is a single replacement, so should I add MgSO4 to the right? But then my lab procedure says that we ...

### Math

Post a New Question Current Questions Homework Help: Math (HELP PLEASE) Posted by Anonymous on Tuesday, September 17, 2013 at 8:37pm. Estimate the total precipitation in inches and in days for Asheville and Wichita. City: Inches: Days...

### math

Use rounding to estimate the product 12*9. Then, use compensation to find the actual answer. If Alison was rounding to find how much 12 books that were $9 apiece cost, would she get a good estimate? Explain.

### algebra 1

I'm stuck on this problem. Can you help? -4x-9y=1 -x + 2y =-4 WHat is x and y? Two equations in two unknowns. Here is a quick way to solve them -4x - 9y = 1 4x - 8y = 16 (I got that my multiplying both side so the secind equation that you provided by -4) Now add the two ...