# math

posted by christine

-3(-9) – |-5 – 3

9c^3+7c-(3c^3-12+c)

4. Solve 4x- 3(5x-8) =23-9(x+2) . Please show all of your work

5. Solve the following equation for z. Please show all of your work.
x=1/25(22z-9w)

6. Solve -14x -7(4-7) <(2x-15) . Write your solution using set builder notation. Please show all of your work
7.
During one year, the Hills' real estate bill included \$413 for miscellaneous services. Of this amount, 8% went to the local homeless shelter. How much money did the homeless shelter receive?

Find the length and width of a rectangular lot with a perimeter of 108 meters if the length is 8 meters more than the width.

9. 9. Solve. Please show the algebraic inequality you used and show all of your work.
The Lido Company rents copy machines for a monthly charge of \$300 + 10 cents per copy. The Lumsden Company rents copy machines for a monthly charge of \$500 + 3 cents per copy. How many copies make the Lido Company more expensive than the Lumsden Company?

1. Ms. Sue

Jiskha is NOT a dumping ground for homework. We help students, but we do not do the work for them. If you continue posting a lot of questions with no work shown, you may be banned from posting here.

Also see Writeacher's message to you earlier today.

http://www.jiskha.com/display.cgi?id=1313421001

2. Henry

2. I'm assuming you meant:

-3(-9) - [-5-3] =
27 - 8 = 19.

3. 9c^3 + 7c -(3c^3-12+c) =
9c^3 + 7c - 3c^3 + 12 - c =
6c^3 + 6c + 12 =
6(c^3 + c + 2).

4. Similar to # 3.

5. x = 1/25(22x - 9w) =
Multiply both sides by 25:
25x = 22x - 9w,
25x - 22x = 9w,
3x = 9w,
X = 3w.

6. -14x - 7(4-7) < (2x-15)
-14x + 21 < 2x-15
-14x - 2x < -15 - 21,
-16x < -36,
X > -36/-16,
X > 2 1/4.

3. Henry

7. 0.08 * \$413 = \$33.04

8. Width = X-Met3rs.

Length = (x+8) Meters.

2x + 2(x+8) = 108m.
2x + 2x + 16 = 108,
4x = 108 - 16 = 92,
X = 23m = Width.

X+ 8 = 31m = Length.

9. 0.1x + 300 > 0.03x + 500,
0.1x - 0.03x > 500 - 300,
0.07x > 200,
X > 2857 Copies.

## Similar Questions

1. ### Algebra

Solve. Find the exact solution(s). Simplify as much as possible. Show work. 2x^2 + 4x – 1 = 0
2. ### Algebra Help

Solve. Find the exact solution(s). Simplify as much as possible. Show work. 2x^2 + 4x – 1 = 0
3. ### mat115

Please help me with this math question. I am asked to show my work but I don't know how to solve the problem to show my work. The question is: Choose the correct list of factors of the number 8. Again, I have to show my work with this …
4. ### algebra

simplify and show all work 11+12^2-(-11)*12 is this right11+144-(-11)*12 155-(-11)*12 144*12 1,928 simplify -(8m)-(-7m+2) 15m-2 according to order of operation what should be done first when evaluating this expression do not solve …
5. ### Calculus

Let f (x) = 5x^2 – 9 and g(x) = x – 3. (a) Find the composite function ( f o g)(x) and simplify. Show work. (b) Find ( f o g)(2) . Show work.
6. ### Math

Consider the equation below. 1/5(x+2)+2x = 6x-10 Part A: Which property can be used to simplify the expression 1/5(x+2)?
7. ### chemistry

1.)Calculate the number of moles in 3.50 x 10^21 atoms of silver. Show all work. 2.) Calculate the number of atoms in 2.58 mol antimony. Show all work 3.) Determine the mass of 1.45 mol FePO4. Show all work. 4.) Calculate the number …
8. ### algebra

Let f(x)= 2x^2 +7 and g(x)= x – 6. (a) Find the composite function (f*g)(x) and simplify. Show work. (b) Find ( f*g)(1). Show work.
9. ### math

I am not sure how to do these. 1. Simplify 4√6/√30 by rationalizing the denominator. Show your work. 2. Simplify (2√5 + 3√7)^2 Show your work. Justify each step.
10. ### Math

Simplify the expressions in each pair. (2 marks each) (Show your work) i) (x^2-x-2)/(x+1),g(x)=(x-2) My work on simplifying the functions: (x-1)(x+2)/(1) (x-1)(x+2) ii) (x^2-x-12)/(x+3), g(x)=(x^2-6x+8)/(x-2) My work on simplifying …

More Similar Questions