Which expression should be used to estimate the answer to this story problem?

marcus is reading a long novel. for 5 nights, he read 83 pages each night. how many pages did marcus read?

a.90 × 5

b.90 ÷ 5

c.80 ÷ 5

d.80 × 5

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Find the area of the unshaded square