Y varies directly as x If x= 5 when y= 12 find x when y = 30
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Set up a proportion so 12/5= 30/x so cross multiply 5 times 30 is = to 12x now divide 150 (which is 30 times 5) by 12 and you get 12.5. So 12.5 is your answer y 12 - x 5 y 30 - x ? x= 30 × 5 ÷ 12 x = 12.5
Eight less than four times the sum of a number and 3 is 16
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the number is 6.....
Determine the surface of the cover of a textbook that has a length of 11 inches, a width of 8 inches, and a height of 3 inches.
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The answer is 264 inches when you use
the formula L × W × H which is 11 × 8 ×
3 = 264 inches
The perimeter of a rectangular rug is 24 feet the the length of the rug 1 2/5 it's width what is the area of the rug2. Explain how you solve the problem
Answers
The area is 6 feet squared. This is because the formula for perimeter is the length plus length added to the width plus width, so you know that the P is 24 and the length is 1 2/5. So you do 1 2/5 plus 1 2/5, which is 2 4/5. You do 24 divided by 2 4/5 (because the width has to add up to the perimeter divided by the length) which is then, 8 4/7. Next, since 4 2/7+ 4 2/7=8 4/7, because you now have the width and length. And since A (area) = l (length) times w (width), you do 1 2/5 times 4 2/7, which is then finally, 6. And to conclude the area is 6 feet squared. It is squared because area is found by multiplying two numbers, while volume (where you use cubed) is found by multiplying three numbers.
(Sorry if it took a while.)
Lucy is a dress maker. She sews 4/7 of a dress in 3/4 of an hour. At this rate, how many dresses does Lucy sew in one hour?
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this can be solve by proportinality amount of dress is directly proportional to time she make the dress 4/7 = a (3/4)a = 4/7 / (3/4)a = 16/21 so if she sew for 1 hr d = atd = 16/21 (1)d = 16/21 of a dress