Which of these equations represent functions?

check all that apply.

a. x2 + y2 = 1
b. y = 3x
c. y = x2 - 3
d. y = 10x3

Afurniture manufacturer produces chairs and sofas. each chair requires 10 yards of fabric, and each sofa requires 20 yards of fabric. the manufacturer has 300 yards of fabric available. to fulfill orders, the number of sofas must be at least twice the number of chairs. let x be the number of chairs and y the number of sofas. which inequalities are described in the problem? check all of the boxes that apply

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?