10/27/12

#### A student's grade in a course is the

A student's grade in a course is the average of 4 test grades and a final exam that is worth twice as much as each test. Suppose a student has test grades of 91, 82, 83, and 92. Write an equation...
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10/26/12

#### what symbol u can put instead of the questions mark, with the SAME symbol?......(5?5+5?5=11)SAME SYMBOL!!!

this is a pre-algebra math problem, but i have no idea how to do it.... so how can u get 11, with 4 fives, same symbol sign instead of the ?marks, and there's a + sign in between....
5?5+5?=11

10/26/12

#### chiara has 3 balls more than francesca. marco has 7balls more than chiara. if there are 46 balls how many each of them?

chiara has 3 balls more than francesca. marco has 7balls more than chiara. if there are 46 balls how many each of them?

10/26/12

#### what is the volume in milliliters of 0.0100 mol of CH(subscript4) gas at STP?

could not figure out how to add the 4 subscript for CH

10/26/12

#### Y=XSIN(PI X)Y'=SIN(PI X)+ PI XCOS(PI X)I don't know who to solve for the critical numbers because I don't know how to factor this.Thanks!

With other problems such as Y= 2X^3 + 3X^2, I can easily factor the deriviate: Y'= 6X^2 + 6X and set it equal to zero. With the trig derivative, I don't know how to finish the problem.

10/26/12

#### find x for randon variables 4 probability .10, 6 pis .60 and 8 probabiltiy .30 compute the mean and expected value

P stands for for probabiltiy for each number 4, 6, 8 computr the mean and the expected value

10/25/12

#### If x, y, and z are positive integers such that the value of.... PLEASE HELP

If x,y, and z are positive integers such that the value of x+y is even and the value of (x+y)^2 (squared)+x+z is odd, which of the following must be true?
a) x is odd
b) x is even
c) If z is...
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10/25/12

#### If k,n, and r are integers, let k... PLEASE HELP!

If k,n, and r are integers, let k^(n,r) be defines to be true onlu if n<k<r. If -2^(n,0) is true, which of the following could be a possible value of n?
I. -3, II. -1, III. 3
a) I only
b)...
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10/25/12

#### SAT Prep Math Queston!! PLEASE HELP

A regulation for riding a certain amusement park ride requires that a child be between 30 inches and 50 inches tall. Which of the following inequalities can be used to determine whether or not a...
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10/25/12

#### (X-2)/3+(X-2)/4=7/24

PLEASE SHOW ME THE STEPS TO SOLVE THIS EQUATION. I KNOW THE ANSWER IS X=5/2

10/25/12

#### comgining like terms. what do these mean,11b -6 6v 5a 5c 6 -5b 2b what do or how do i use them..

comgining like terms. what do these mean,11b -6 6v 5a 5c 6 -5b 2b what do or how do i use them..

10/25/12

#### which ordered pairs are solutions of each equation?(circle them)

3x+3y=0
A.(1,-1) B.(2,4) C.(-1,1) D.(-2,2)

10/25/12

#### which ordered pairs are solutions to each equation?(circle them)

x-3y=-7
A.(2,-1) B.(2,4) C.(-1,2) D.(2,3)

10/25/12

#### which ordered pairs are solutions of each questions?(circle them)

y=3x
A.(6,2) B.(-2,-6) C.(0,0) D.(-15,-5)

10/25/12

#### determine the slope and y-intercept of each line then graph it

2x+3y=6 m=___________ b=__________

10/25/12

#### determine the slope and y-intercept of each line then graph it

3y=2x+3 m=__________ b=__________

10/25/12

#### determine the slopeand y-intercept of each line then graph it

2x-y=-3 m=__________ b=_________

10/25/12

#### determine the slope and y-intercept of each line then graph it

3x+y=-2 m=_______ b=_________

#### how do you get y by itself:h*x+k*y=20

PLEASE HELP\
how do you get y by itself:h*x+k*y=20

10/25/12

#### what is the answer to 53/7:7

This is my little brothers math problem he had for homework last night. How do you do this?

10/25/12

#### Evolution theory is 100% right ?

Evolution theory stated that random changes and the natural selection process create new species. What are some examples of random changes that have been (or being) filtered out by natural...
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10/25/12

#### does from mean subtract

Victor is building a set of stairs. The board he is cutting to make the steps is 12 ft long. Each step is 3 1/2 feet long. How many complete steps can he make from th 12 ft board?
Does the word...
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