Determine the equation of joint variation. Then solve for the missing value.

x varies directly with y and z.

x = 400 when y = 8 and z = 10.

Find x when y = 10 and z = 12.

Find the least number by which 112 must be multiplied to give a perfect square

Aladdin had two envelopes to start. He bought three packs of envelopes. Each pack had the same number of envelopes. Aladdin now has 17 envelopes. Write an equation to find the number of envelopes in each pack. State what the variable represents.

Write 80/100 as tenths in fraction form and decimal form

What is the opposite of a straight and narrow path

What is the least common multiple for 4 and 5 and also 5,6and 7

Emily sold 78 boxes of cookies for a fundraiser. If she sold 40% of the total number of boxes sold for the fundraiser, how many total boxes of cookies were sold for the fundraiser?

How bad is the heavy traffic? you could walk 15 miles in the same time it takes to travel 30 miles by car. if the cars rate is 4 miles per hour faster than your walking rate, find the average rate of each

a contractor used about 4 1/5 pounds of nails per day. How man pounds of nails did she use in 5 days?

The temperature on Saturday was 6 1/2 celcius. On Sunday it became 3 3/4 celcius colder what was the temperature on sunday

Calculate the average rate of change of f (x) = 3x2 + 2x + 1 for 2 ≤ x ≤ 4. A) 10 B) 20 C) 37 D) 40