Question

Evaluate the following expression for the given values of the variables.

1. (2s - t^2) / (st^2) for s = 5 and t = 3

A: 1/45 or 45

Simplify each expression.

2. -x - 3y + 4x - 9y + 2

A: 3x - 12y + 2

3. -4(-a + 2b) - 3(a - 5b)

A: a + 3b

4. 5 - (3m + 2n)

A: 5 - 3m - 2n

5. Enrique is baking muffins and bread. He wants to bake a total of 10 batches. Each batch of muffins bakes for 30 minutes, and each batch of bread bakes for 50 minutes. Let m represent the number of batches of muffins.

a. Write an expression for the total time required to bake a combination of muffins and bread if each batch is backed separately.

b. If Enrique makes 2 batches of muffins, how long will it take to bake all 10 batches?

A:

a. 500 - 20m
b. 460 minutes or 7 hours and 40 minutes.

Answer 1

1. (2s-t^2)/(st^2) = (2*5-3^2)/(5*3^2)=
1/45.

2. -x-3y+4x-9y+2 = 3x - 12y + 2.

3. -4(-a+2b) - 3(a-5b) = 4a-8b-3a+15b =
a + 7b.

4. 5-(3m+2n) = 5-3m-2n.

Answer 2

Tell your mother I said hi, and tell yourself to do the work sweetie. Or else I won't bring cupcakes next month when I come to visit.