Carlos needs 2/3 cups of raisins to make one batch of oatmeal bars. How many cups of raisins does Carlos need to make 4 batches of oatmeal bars?

8/3 cups

Step-by-step explanation:

Since he needs 2/3 cups for each batch, and he wants to make 4 batches, we can add 2/3 4 times, or multiply 2/3 times 4.

2/3+2/3+2/3+2/3=8/3

2/3*4=8/3

He needs 8/3 cups for 4 batches.

This can also be written as a mixed number: 2 2/3 cups

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

step-by-step explanation:

6.48/4 4 goes into 6.48 1.62 times