SOLUTION: Evaluate when a=2 and b = -3 a. �3a +2b b. b-3b c. �2a(3-b) Solve for x a. x+5= -6 b. �2x+3=15 c. �3(x+2)= -30 d. 7x-4=9x+6 If x=2 and y= -5 in this problem, what is t

Question 171802: Evaluate when a=2 and b = -3
a. �3a +2b
b. b-3b
c. �2a(3-b)
Solve for x
a. x+5= -6
b. �2x+3=15
c. �3(x+2)= -30
d. 7x-4=9x+6
If x=2 and y= -5 in this problem, what is the value of the following expressions after you substitute
2x+5y-4=
4y+3x-2xy=
True or False?
a. 4^3+4^5=4^8
b. (-5)^3= -5^3
I need help with these. and I think I will be able to figure out the rest of my hw. Thank you very much for anyone who can help me!

Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
I'll one of each to help you get started

Problem: Evaluate when a=2 and b = -3

a. �3a +2b

Solution:

Start with the given expression

Plug in a=2 and b = -3

Multiply -3 and 2 to get -6

Multiply 2 and -2 to get -6

Subtract -6 from -6 to get -12

So when a=2 and b = -3

Problem: Solve for x

d. 7x-4=9x+6

Solution:

Start with the given equation.

Add to both sides.

Subtract from both sides.

Combine like terms on the left side.

Combine like terms on the right side.

Divide both sides by to isolate .

Reduce.

----------------------------------------------------------------------

Answer:

So the answer is

Problem: If x=2 and y= -5 in this problem, what is the value of the following expressions after you substitute

2x+5y-4=

Solution:

Start with the given expression

Plug in x=2 and y= -5

Multiply 2 and 2 to get 4

Multiply 5 and -5 to get -25

Subtract -4 from -25 to get -29

Subtract 29 from 4 to get -25

So when x=2 and y= -5

Problem: True or False?

b. (-5)^3= -5^3

Solution:

Start with the given equation

Cube -5 to get

Cube 5 to get

Since both sides are equal to one another, this shows us that . So the answer is true.
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