4.) Pizza Hut has a sale. Two large one topping pizzas for $12.99 + tax (7%). What the sales tax?
O a) $9.09
O b) $0.91
O c) $0.90
O d) $9.10

Tax=$0.91

Step-by-step explanation:

Tax=$12.99(.07)=$0.9093

Tax=$0.91

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.

its an acute right triangle

step-by-step explanation: