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viva [34]
3 years ago
5

Suppose that y varies inversely with x, and y=4 when x=7. What is an equation for the inverse variation

Mathematics
1 answer:
balu736 [363]3 years ago
8 0

Answer:

xy = 28

Step-by-step explanation:

The formula for inverse variation is

xy =k

If y = 4 and x = 7

4*7 = k

28 = k

The equation is xy = 28

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Marina86 [1]
I think it A but I’m not 100% sure
5 0
3 years ago
Simplify the rational expression<br> x^2-25÷x^2+x-6 × x+3÷×-5
aliina [53]

Answer:

 x - 6

 —————

 x + 5

Step-by-step explanation:

4 0
3 years ago
Can any of you guys help my cousin with her homework its very confusing to me I'm not very good at math so please help her she g
dangina [55]
Simplify 5/15: the numerator and denominator are both multiples of 5, so the fraction can be reduced to 1/3 by dividing the top & bottom by 5. 5/15 of a rectangle is the same as 1/3 of a rectangle.

Compare 1/2 and 5/7:
The simplest way is to ask if 5/7 is more than one half. Half of 7 is 3.5, and 5 is greater than 3.5, so 1/2 < 5/7.
The way that is a little more work is to get a common denominator and make equivalent fractions of 7/14 and 10/14.

Fraction to decimal of 4/5. 4 divided by 5 = 0.8

Decimal to fraction, 0.78:
0.78 = 78 hundredths = 78/100 as a fraction. They usually want fractions in the lowest terms, so divide the numerator and denominator by two, and you have 39/50.

Mixed to improper fraction 5 2/9: multiply the denominator of 9 times the whole number of 5, that equals 45. Add the 2 in the numerator, that is 47. Keep that over 9, because we are trying to figure out how many ninths we have. 5 2/9 = 47/9

Add ‘em 3/5 + 1/2:
Make equivalent fractions with a common denominator. (10 is the least/lowest common denominator). So we are adding 6/10 + 5/10 = 11/10 or 1 1/10.

Improper to mixed, 9/4:
We have 9 fourths. 4 fourths = 1 whole. So we get 2 wholes with 1/4 left over. 9/4 = 2 1/4.

Subtract ‘em, 3/10 - 1/5.
Again, need a common denominator/equivalent fraction. 1/5 = 2/10
3/10 - 2/10 = 1/10

Draw it, 1/3:
The circle is already divided into thirds. Shade one of them in.

Multiply ‘em 2/3 x 5:
Multiply the numerator times the whole number, leave the denominator alone. 2/3 x 5 = 10/3 = 3 1/3 if they want it converted to a mixed number.

Divide ‘em: 8/9 divided by 3 is 8/27

What’s the word?
4 x 1/2 = 2 (what is one half of 4?)

Word up:
3/5 divided by 3 = 1/5

Your grade? 14/14 = 100%

Please let me know if you have questions. Please mark brainliest if you can :) Thank you!
4 0
3 years ago
Find the volume of a cylinder that has a radius of 6 feet and a height of 10 feet. Use 3.14 for pi.
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It is the last one, 1,130.4 ft^3. The volume of a cylinder equals pi (in this case 3.14) multiplied by the radius squared multiplied by the height. (3.14x6^2x10)
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How do i find the area of 8,12, and 4?
Viefleur [7K]

Answer:

Step-by-step explanation:

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