posted by .

1) Solve the equation: 15(7x-6) = 3x-5

2) Mary and her brother collect coins. Mary has 4 times the number of coins that her brother has. Together they have 175 coins. How many does Mary have?

3) Perform the indicated operations. Express the answer as a single polynomial in standard form.
(x-1)(x^2 + 2x -3)
My answer is x^3 + x^2 - 5x + 3

4) Determine which values must be excluded from the domain.
x / x^2 - 9
My answer is x=3 and x=-3

5) Solve the equation. The letters a,b,c are constants.
ax-b=c; a is not equal to 0.
My answer is x=b + c / a

6) Find c in the following.
For 4x^2 - 12x + c to be a perfect square, c must be?
The choices are 9 , 3 ,-9, 0, or noe of the above.
My answer is none of the above.

7) Write the statment using symbols.
The sum of four and x is the product of 5 and y.

My answer is 4+x = 5y

8) write the number as a decimal.
3.875 x 10^-9

all ok, except #5 and #6
in #5 write it as (b+c)/a or else only b is divided by a

#6 should be 9 so that
4x^2 + 12 + 9 = (2x+3)^2

Thank you!

(x-2)(x+2)
___________
2(x-3)

I need to see the work for the problem 2/5x2875....I know the answer is 1725...but i need to see the process in order to answer the other questions.

Similar Questions

1. Math

Make your own equation. 1. A number is 6 times another number. The sum of the two numbers is 56. @. Donna has twice as many coins as Cathy. When Donna gives Cathy 2 coins, they each have the same number. How many coins do they each …
2. Math

Mrs. Chans math class contributed 2 dollars and \$1 coins to an earthquake relief fund. the number of \$1 coins contributed was 8 less than 5 times the number of \$2 coins contributed. if class raised total of 160 bucks, how many coins …
3. Math

Susan has some \$2-coins and \$5-coins. If there are 18 coins and the total amount of these coins is not less than \$75, find the minimum number of \$5-coins.
4. maths

A bag contained a number of 20cents, 50cents and \$1 coins. 1/3 of the 20cents coins is equal to 2/3 of the 50cents coins. There are 3/5 as many 50cents coins as \$1 coins. If the total value of these coins is \$23.10, how many coins …

I need to use quarters, dimes, nickles and pennies to make the following: \$1.53 in 12 coins \$2.53 in 20 \$2.32 in 15 coins \$2.00 in 22 \$1.45 in 10 coins \$1.76 in 16 coins \$0.85 in 11 coins \$1.01 in 12 coins \$1.29 in 15 coins
6. Math

Thomas put 1/4 of the c coins he had in his pocket into the jar under his bed. He put 16 coins into the jar. The equation that models this situation is 1/4c = 16. How many coins did Thomas have in his pocket?
7. maths

mohan changed 2 in to 5 p 20 p and 50 p coins. if the number of 5 p coins was double the number of 20 p coins and the 50 p coins were one fifth the 20 p coins . how many coins of each denomination did he get?
8. Math

Please check to see if I did this correctly. This is a 2 part math problem. 1. Janelle has d dimes and n nickles. Her sister has 5 times as many dimes and 6 times as many nickles as Janelle has. Write the sum of the number of coins …
9. hj

mary and peter have 480 coins after party spending 20 coins . he has 3 times as much coins as mary..how many did mary have