How to make this y=21x-7 into standard form

The music for Jordyn's dance routine lasts for exactly 4 minutes. When Jordyn dances her routine, she starts with her music and finishes 12 seconds before the music ends. What percent of the time the music is playing is Jordyn dancing?

X=2y 4x+3y=19.25 substitution method

Suppose that the weight (in pounds) of an airplane is a linear function of the amount of fuel (in gallons) in its tank. When carrying 16 gallons of fuel, the airplane weighs 2004 pounds. When carrying 48 gallons of fuel, it weighs 2212 pounds.

A circle has a diameter of 24 units. What is the area of the circle to the nearest hundredth of a square unit? A 37.70 B. 75.40 452.39 D. 1809.56

The table shows the total amount of money in a parking meter at different time intervals after it was repaired. Hour--1,3,6,7,12 Amount of money--0.40,3.75,4.95,6.15,10 What was the average rate of change between hour 1 and hour 6?

What is 1.179 rounded to the nearest 2dp

Continue the pattern for 3 more numbers, 1, 3, 7, 13, 21,__, __, __. What is the pattern?

A sauce recipe uses 4 cans of tomatoes in every 21/2 quarts. how many cans of tomatoes are used in each quart of the sauce?

In geometry, the kissing number of a mathematical space is defined as the greatest number of non-overlapping unit spheres that can be arranged in that space such that they each touch a common unit sphere.

leg a of a right triangle is 12 inches long and the hypotenuse c is 13 inches long how long is the other leg b