Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth.

x^2-21=-4x

a. 7,3

b. - 7,4

c. 7,-3

d. - 7,-3

Simplify each radical expression - square root of 200 square root of 125 -5 square root 112 square root of 68 3 square root of 121 square root 63t to the 4th power square root of 48n to the 3rd negative square root of 60m to the 7th

Chris wanted to find out what would make his tomato plants grow best. He set up an experiment to find out and planted three little plants. He gave each plant different amounts of water, fertilizer, and sunlight. The amounts are shown below.

Joey Chestnut is trying to break his own world record for eating the most hot dogs and buns in 101010 minutes. He needs to eat more than 72 hot dogs to break his record. After 1 minute of competition, Joey has eaten 10 hot dogs.

What is the slope of the equation y=2.10x + 1.15

What is the volume of a cylinder with base radius 3 and height 6? Either enter an exact answer in terms of it or use 3.14 for it and enter your answer as a decimal. cubic units

Why can't the input value be negative?

A regulation-size women's basketball has a diameter of 9.07 inches. What is the surface area of the basketball? Use 3.14 for π and round to the nearest tenth. Enter your answer in the box.

Maddy's fourth grade class is going on 5 field trips. Each has a fee of $12.10. Sack lunches for each trip are an additional $2.75. Round each amount to the nearest dollar to find an estimate for the cost of all 5 trips. A. $60 B. $65 C. $70 D. $75

What is another equivalent expression for 4 (5 + x)

An aluminum can has a capacity of 2.32 L. How many milliliters of soup can it hold? (1 L = 1,000 mL)