Math(Please help)

185,959 results, page 77

Math. Urgent please help

ABC is an isosceles triangle. If AB =AC =16, BC=8. D is the midpoint of side AC , and G is the centroid of triangle ABC , find BD .

math

write the pair of the fractions as a pair of fractions with a common denominator : a.) 2/4 and 7/8. b.) 3/10 and 1/2. my answer for the a.) is 16/32-28/32. for b.) is 6/20-10/20 please let me know is my answers is right or not

math

I need help on how to use a common denominator to write an equivalent fraction for each fraction?number 1 is 1/2,1/3 and number 2 is 7/8,3/10 please help

math-urgent

Sample space ={1,2,3,4,5} p(1)=0.1, p(2)=0.2 and p(3)=p(4)=0.05. Assume that A={1,3,5} and B={2,3,4}. Find p(5). Find p(A^c). I need help with this question. It is a probability question. please help.

Math 2

Two friend share1/2 of a pineapple equally. What fraction of a whole pineapple does each friend get? Please answer

Math

How do you solve 2y-5x=10 using the dual intercept method? I have to solve for X int and y int on a graph. Please help

math

(please solve step by step) solving equation (6x+2)/4 + (2x²-1)/(2x²+2) = (10x-1)/4x we got roots as

MATH HELP PLEASE

Which of these numbers can be classified as both real and irrational? a. 5.85 b. 63.4 c. square root 21 d. square root 36 Is the answer D?

MATH HELP PLEASE

Which of these numbers can be classified as both real and irrational? a. 5.85 b. 63.4 c. square root 21 d. square root 36 Is the answer D?

math

an average sized dog weighs about A. 15 grams B. 50 grams C. 5,000 grams D. 15,00 grams I don't know the answer, please help

5th grade Math

Is the Distributive Property of (5*600)+(5*400) (600+400)5? I'm not really sure...please help...

Math

solve the proportion using cross products. 20 miles/60 hours=16 miles/h hours? a.20 b.40 c.48 d.64 ??? thanks in advance:) please help!!!

Math

9 friends share 12 pounds of pecans equals how many pounds of pecans does each friend get? Please answer soon! :-) :-( :-(

Math (written answer)

C/4-5=4 (c over 4) Please explain how to do this, its a written answer questen and I have no idea how to do it at all..

MATH HELP ASAP PLEASE!!!!!

the formula of a volume of a cube is v = s3. find the volume of a cube with a side length of 3/4 inches.

Math

A biology class has 12 boys and 18 girls .what fraction of the class are boys? Solution. 12/30=2/5 Please tell me this correct or not.

Math

The point (2, 3) is on the graph of y f(x). Determine the corresponding coordinates of this point on the graph of y= 2(f(2(x + 5) 4. Please include a full solution! A: (1,3),(1,6), (1,-6), (-4,-6), (-4,-10)

Math help me please

The temperature started at 35°F. If the temperature went down 4°F and then up 2°F, whats is the temperature difference relative to the high temperature? A) -2°F*** B) -1°F C) 1°F D) 2°F

Please Help asap: Math

X is greater than or equal to 3 I'm pretty sure that its D, but i'm not sure 0=open dot @=closed dot A) @-------> 3 5 B) <-------------0 -5 0 3 C) <-------------@ -5 0 3 D) 0-------> 3 5

math URGENT PLEASE HELP

can you please explain this question to me for part b i get t=0.7 by trial and error and 0.6 percent of the population but im sure theres a more exact way to do it (a) A chemical process produces NaCI at the rate 3.Jtgrams per minute. (i) What is the rate of production 4 ...

statistics

Lilly collects data on a sample of 40 high school students to evaluate whether the proportion of female high school students who take advanced math courses in high school varies depending upon whether they have been raised primarily by their father or by both their mother and ...

Math

I need help solving this math problem, please: Problem: Angela's math test had 100 multiple-choice questions. Each correct answer was worth 1 point, each incorrect answer was worth -2 points, and skipped questions were worth 0 points. Angela answered an even number of ...

math help

I need help solving this math problem, please: Problem: Angela's math test had 100 multiple-choice questions. Each correct answer was worth 1 point, each incorrect answer was worth -2 points, and skipped questions were worth 0 points. Angela answered an even number of ...

CHEMISTRY HELP PLEASE!!!

The cell potential of the following electrochemical cell depends on the pH of the solution in the anode half-cell: Pt(s)|H2(g,1atm)|H+(aq,?M)||Cu^2+(aq,1.0M)|Cu(s) what is the pH of the solution if Ecell is 375 mV? I first got .65 as my pH, but it said that it was wrong. ...

very hard math question please help

The Candle Shop -Annual Inventory of candles. _______-________________________________ Jan 1 Beg Inventory 5,000 units @$0.89 ---------------------------------------- Feb 15 Purchase 10,000 units @ $0.69 ________________________________________ April purchase 2,000 units @ $1....

Math

6. Vangie had 0.75 ream of bond paper. She used 0.25 of it in her project. What part of the ream of paper did she use? Please answer this question.\

Math

Please help!!! 1. Simplify...w+3/4w divided by w-3/2w to divide one fraction by another, keep the first fraction as is, then multiply by the reciprocal (flip) of the second one. so... (w+3)/(4w) ÷ (w-3)/(2w) = (w+3)/(4w) x (2w)/(w-3) = (w+3)/[2(w-3)] Thank you!!!

Math

Please check my answer thanks :) When repaing an installment loan of $3,500 with 20 equal monthly payments of $196 each , the apr of the loan is my answer is 13.5 %

Math - Inverse Functions

Find the inverses of the following functions. y = 3(x - 1)^2, x >= 1 Work: x = 3(y - 1)^2 x = 3(y - 1)(y - 1) x = 3(y^2 - y - y + 1) x = 3y^2 - 6y + 3 And now what do I do!? Please explain and show me how to solve this inverse function! ... Thank you

math

{y-2}/(a^2-5a+6)=(a+1)/(a-3)-(a+2)/(a-2) How can I solve for y in terms of the other variables??? I tried many times, but I just get y=6,can't express y in terms of variables. Can anyone please correct me or teach me?THANKS A LOT!

Math

Xavier and Yolanda have a combined aged of 24. 6 years ago Xavier was 3x as old as Yolanda. Can you help with the equation and the working out please.

math

Is there a formula to sum the digits between two numbers? eg. 1 to 20 = 1+2+3+4+5+6+7+8+9+1+0+1+1+1+2+1+3+1+4+1+5+1+6+1+7+1+8+1+9+2+0 = ?? I am looking for the numbers 1 to 2008 so I really need a formula! Please help, thank you. Jane

math

how would you determine a conic represented by the polar equation r=a*cos(x)+b*sin(x). then how would you convert the equation to rectangular form? please help

math

the question asks to integrate cos(t)/(5sin(t)+8)^2 the answer i got was xcos(t)/(5sin(t)+8)^2 i think the x is wrong but i am not sure what i am doing wrong...help please.

Math(Please check)

1) Use the cofunction identites to evaluate the expression without the aid of a calculator. cos^2 18 degrees + cos^2 72 degrees.

Math

Could someone please help me with this problem? I need to solve -5/2x greater than or equal to -7/4. Here is the answer that I got but I 'm sure that it is not correct. x greater than or equal to 35/8. Thanks.

Math

Please explain why a positive number minus a negative number equals positive and you add it together??? Makes no sense at all. ex 10-(-3)=13

Math 5th

i need help in a hurry!!!!!!! I need to know what the fractions-one half and so on until one fourth us equal to bye tomrrow!!!!!!!!!!! please help!! :)

8th grade math

Can you please check my answer? Selena received $42 commission for selling a computer for $1400. What percent is her commission? my answer: 3%

Math

which of the following sums is larger and by how much? round your answer to 4 decimal places if necessary 1. 7 over Sigma 15/4(pi/10)^n 2. 11 over Sigma 17/4(4/13)^n please help!

Math - Please Help

Find two positive fractions such that if we switch the denominators, the sum afterthe switch is 50 times the original sum.

Math(Please check)

Determine whether on not the following limit exists. If, so compute the limit. lim x->3 of sqrtx - 4 / x^3 +27 sqrt 3 - 4 / x^3 + 27 = sqrt 3 -4 / 54 Is this correct?

Math(Please help)

The radius of a niobium atom is 131 pm. How many niobium atoms would have to be laid side by side to span a distance of 1.4 mm?? I know that 10^9 is pm or is it -9??

Math

Lee has 35 dimes and quarters that total $5.00. Solve the system of equations to find how many dimes and how many quarters he has. d+q=35 0.1d+0.25q=5 Please show your work thanks

8th grade math

How do you turn these equation into a standard form? this is the standard form: ax+by=c here are the following equations: 2x = y + 1/2 y - 2 = 1/4x + 1 3y + 3 = 6x - 15 Please help and explain. Thank you.

Math

Mr.Mike wants to leave the waitress a 12% tip. Estimate the tip if he should leave if the family's bill is $32.46. Please show ALL WORK.......THANK YOU!!!!! :)

math

Your fixed expenses are $1,035.65/month and are 36% of your realized income. Use proportions to compute the realized income on your budget. I am lost please help

Math: Geometry

If 0 < y < 1 and 0 < x < 1, find the probability that y < x. Begin by sketching te graph, and then use the area method to find the probability. Please help me. I do not understand. Thank you in advance!

Math: Geometry

If 0 < y < 1 and 0 < x < 1, find the probability that y < x. Begin by sketching te graph, and then use the area method to find the probability. Please help me. I do not understand. Thank you in advance!

Math

Each fence section has a post at each end. How many posts are needed to build a fence with 10 sections? Is it 8, 11, 10 or 9 posts ?? Please explain to really want to understand this!!

Math/Statistics

Can anyone please help me explain confidence intervals. How does one tell/determine if a confidence interval is too wide? What indicates too wide? Thanks in advance!

Math - please help

Write an equation for the line that is parallel to the given line and passes through the given point. y = 5x + 10; (2, 14) A.y=1/5x +4 B.y=-1/5x-4 C.y=5x-68 D.y=5x+4 I think it might be D...not sure

Math

Matt puts 3 1/2 quarts of lemonade in the pitcher. He adds another 1/2 quarts. How many pints of lemonade does he have total? PLEASE SHOW WORK! :[

math HELP!

nobody has answered yet and this is the only question I need :( If angle A=30* and side b=4.0 km, how do I find side c? I know that this is a 30-60-90 triangle but I don't know how to find the hypotenuse. please help!

math help now please

If a figure is a rectangle ABCD and the measure of angle ABD is 35 degrees what is the measure of the angles ABD CBD and BDC

Math Ms. Sue Please help!

Can you find me a website how to do inequalities on line graphs on the less than and greater than inequalities. Ex: 2r-2<4 (A line goes under the sign "<")

Math 6th grade

I am having trouble with Input output for this problem, I can't figure out the function rule input x= output y= 2 1 3 0 4 -1 Please Help!

math

1)find the sum of the odd integers from 25 to 75 2)find the sum of the first 20 terms in the series 10+5+2.5+1.25... . please show the steps to solve the problem^_^

Math

Let Alpha and Beta be the zeros of the cubic polynomial x^3 + ax^2 + bx + c satisfying the relation Alpha * Beta = 0. Prove that : c^2 + ac + b + 1 = 0. Please work the complete solution.

Math

Let Alpha and Beta be the zeros of the cubic polynomial x^3 + ax^2 + bx + c satisfying the relation Alpha * Beta = 0. Prove that : c^2 + ac + b + 1 = 0. Please work the complete solution.

Math

Let Alpha and Beta be the zeros of the cubic polynomial x^3 + ax^2 + bx + c satisfying the relation Alpha * Beta -1 = 0. Prove that : c^2 + ac + b + 1 = 0. Please work the complete solution

math

I need the answers to the why did the banana go out with the prune worksheet. I already have the answer to the riddle, but I need the numeral answers please.

Math please help?!?!

Point A lies in plane B. How many lines can be drawn perpendicular to plane B through point A? 1) one 2) two 3) zero 4) infinite

math

In a 365 day calendar year, there are ____ more odd-numbered days than even-numbered days. Please Explain

math 1

olivia ties 2.5 feet of ribbon onto a balloon. how many yards of ribbon does olivia need for 18 balloons? please anser thx

Math!!!

Sam buys a lamp during the sale. There was a discount of 20%. If the original price is $4, what is the sale price? - Please put in proportion form!

math

When the population of a town rose from a million to a + x million, the per cent increase was a. x/a % b. 100a/x % c. 100x/x-a % d. x/a-x % e. 100x/a % please answer and explain

math

If unequal quantities are subtracted from equal quantities, the remainders are unequal in the opposite order. Since 25=25 and 5>3, then 20<22. If x=y and a>d, then x-a<y-d. Please show work and explain.

math

15. The sum of five unequal whole numbers is 90. The second largest of these five numbers can be at most A.19 B.41 C.43 D.89 please explain and show work.

math please help

The sales tax oon a $350 computer is $22.75. Find the saes tax rate. 24 red marbles is 40% of _____ marbles.

6th grade Math

Abraham earns $11.50 an hour. How many hours will Abraham have to work to earn $483? Please Show Work!!!!

Math

A set of trading cards sells for $12.00. After sales tax, it costs $12.60. what is the sales tax rate? Do I divide to get this answer? Please help.

Math, please help

Dennis will roll two number cubes once. Each cube is labeled 1 to 6. What is the probability that the sum of the cubes will be an odd number?

math please help 8th grade

y = 2x + 7 The slopes are equal. The graph has a greater slope. *** The equation has a greater slope.*** none of the above an i right? (:

Urgent math

so I tried to expand this question and I got x^3 *x2, i don't know if it's right but if not can I get a step by step explanation please, Expand (2x + y^2)^5. (Simplify your answer completely.)

math-Urgent help please.

A diver's elevation is -30 feet relative to sea level. She dives down 12 feet. What is her elevation after the dive?

Math

Convert 630 cubic centimeters to cubic inches. I know that 1 inch = 2.54cm I tried 630/2.54 but I didn't get the answer in my book, which is 38.44. What am I doing wrong please?

Math

Please help me solve this one. I am looking for 4 digit answers for PLAE and MMSS MAKE+SEAK=PLAE ELKS+ESSK=MMSS

Math

I don't understand how the derivative of tanx/x equals sec^2x/x. I got sec^2x/(-x^2) by the quotient rule. Can someone explain to me step by step please?

Math

Given the points (6,-3) (-4,2): Find the equation of a line that passes through the origin and is parallel to the line defined by the points. Please help me...thank u so much

math

a motion was adopted by a vote of 5 to 3.what part of the total vote was against the motion? ans is 3/8. couldnt get the question and answer?please reply

MATH: Check my answers | HELP ASAP!!

What is the diameter of a circle with a circumference of 282.6 m? Round your answer to the nearest meter. 4.5 m 9 m 90 m##### 45 m Check my answer please.

Math, identities and equalities

Determine the value of a, b, and c so the following equalities become true for any value of x. x^3 - 6x^2 + 15x - 7 =(x+a)^3 + bx + c If possible, could you please show how you solved it.

MATH

How do we find what "a" is equal to? I am not sure if we are supposed to put it back to tangent and then find the common denominator? Please help!?!? a cot 16 - a cot 57 = 9.167

Math

Can you help me write this percent as a fraction please? The percent is 365. I already wrote it as a decimal which is 36.5. I just need help writing it as a fraction now.

Math

Lee Holmes deposited $16,600 in a new savings account at 9% interest compounded semiannually. At the beginning of year 4, Lee deposits an additional $41,600 at 9% interest compounded semiannually. At the end of year 6, what is the balance in Lee’s account? I have tried and I...

"Y912f", please givethis note to your pare

"Y912f", please give the follow note to your parents. Dear Parents of Y912f, Your daughter has been receiving help from Jiskha for quite some time. Our task on this site is to "help" students learn, not do their work for them. It has become obvious that "Y" needs additional ...

Language Arts

Which of the sentences below using direct address is punctuated correctly? (1 point) Please come with me, Sarah, and Tom, to pick Mom’s birthday present. Please come with me, Sarah and Tom to pick Mom’s birthday present. Please come with me, Sarah, and Tom to pick Mom’s ...

Algebra-drwls please check!

Posted by Megan on Tuesday, October 12, 2010 at 3:44pm. I have a question if someone could help, please explain it. Given b = -1 and h = -1, what is the equation of the graph if the parent function is y = sqrt (x) Answers: a.y = sqrt(x-1) b.y = sqrt (-x+1) c.y = - sqrt (-x-1) ...

math

I need a definition for this constant rate of change when graphing in mathematics and for Positive and Negative correlation and also what the pattern is in this a) 1000, 100, 10, 1 please I need help for the second question it is multiplying times 10

math

A ball is thrown straight up. Its height, h(in metres), after t seconds is given by h=-5t^2+10t+2. To the nearest tenth of a second, when is the ball 6m above the ground? Explain why there are two answers. I don't get how to calculate it. Please help.

previous post

has anyone read my 4 previous posts? I really need someone to check my answers. Please be patient, Erin. Our advanced math teachers are not online right now, it seems. =)

Math help please

Find the area and the circumference of a four leaf clover with the square length to be 6 cm This is a square in the center with 4 semicircles "glued" to the sides. Use Pi = 3.14 and ROUND your answers to the nearest WHOLE unit)

math

find the value of sin theta for angle theta in standard position if point with coordinates (negtive 3, 2) lies on its terminal side. i had 2 over sqrt 13 but it was wrong please correct.

Math

can someone please check my answers simplest form evaluate 2/3+3/5-5/7= 58/105 6. 3/7*24/25 divide by 6/7= 12/25 8.find GCF 432,360,288=72 9. 1050,9360,330=30 11. find LCM 14,75,78=13,650

Math

When I did the following problem, I got -12 as my answer. It is an evaluation problem, It looks like this: Evaluate: -2^0[-2^0-2^2-(-2)^3-2](-2^0-2)+x-xy When x= -3 and y= -4 I am unsure if this seems to be correct. If I made a mistake can someone please tell me where I need ...

Math(Please check)

I am trying to find the standard form of this equation for an ellipse. 9x^2 + 4y^2 - 36x + 8y + 31 = 0 First I grouped the x and y's together. 9x^2 - 36x + ? + 4y^2 + 8y + ? = -31 + ? + ? Then I factored the 9 and 4. 9(x^2-4x+4) + 4(x^2+2x+1) = -31+36+4 9(x-2)^2 + 4(x-1)^2 = 9...

Math: please check

A card is drawn at random from an ordinary deck of playing cards. Find the following odds: Odds against drawing a king, queen, jack, or ace Would this not be 16/52=4/13

math-- please help

A minor league baseball pitcher is hired for $700 per month plus $100 per game won. Write an equation to express his monthly earnings (e) in terms of games won (x).

5th grade math

Shawn had 42 hits in 140 at bats during the baseballe season. What is the decimal that represents his batting average, or hits per at bat? Please show me how to get the answer... Thanks

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