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2 years ago

If the value of "Y" varies directly with "X" and y=-8,when x=20,find "Y"if x=-4

Mathematics

1 answer:

kherson [118]2 years ago

6 0

Answer:

y is 8/5 when x = -4.

Step-by-step explanation:

If the value of "Y" varies directly with "X", we can write y = kx, where k is the constant of proportionality.

If "y=-8,when x=20," then we can find k: -8 = 20k, or k = -2/5.

Then y = (-2/5)x.

If x = -4, then y = (-2/5)(-4) = 8/5

y is 8/5 when x = -4.

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maks197457 [2]

Answer:

which of the following element is essential to formation and

Step-by-step explanation:

maintenance of bones and teeth

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2 years ago

I NEED HELP ASAPPPP

Yuliya22 [10]

Pythagorean Theorem- A^2+B^2=C^2
1) 6^2+9^2= x^2
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4 0

2 years ago

If you could explain to me how you get the answer, that will be great!

Varvara68 [4.7K]

Answer:

156 inches^2

Step-by-step explanation:

The area of a triangle is 1/2 base x height

All of the triangles have a base of 6 inches and a height of 10 inches.

so 1/2 6 x 10= 30

There are 4 triangles with an area of 30 square inches

and then the square in the middle has a length of 6 in and a width of 6 in so it has an area of 36 in^2

so in total you would have 30+30+30+30+36, or 156

3 0

2 years ago

Eliza bought a day pass to rent a bike in the city. The day pass costs $40 from 9 a.m to 7 p.m. There is a additional fee of $4

murzikaleks [220]

out of 50 bucks Eliza has already used 40.

she has 10 dollars to pay for 5 quarter of an hour

very quarter of an hour takes 4 dollars. Eliza needs 10 more bucks. Eliza does not have enough money.

In an equation 4$ = 15 Minutes. So Eliza should return the bike at 7:30.

7 0

3 years ago

An archeologist used the functions below to model the changing populations of two ancient cities as they grew in size. Compare t

Lyrx [107]

Answer:

The answer is "6.3 and 5.25"

Step-by-step explanation:

Please find the complete question in the attached file.

Throghout the question the calculated points are:

$(0,0) , \ \ (40,252) \\(0,0) , \ \ (40,210) \\$

Formula for Calculating slope:

$M=\frac{y_2-y_1}{x_2-x_1}$

For First point slope:

$M=\frac{252-0}{40-0}=\frac{252}{40}= 6.3 \ \frac{people}{mi^2}$

For second point slope: $M=\frac{210-0}{40-0}=\frac{210}{40}=\frac{21}{4}= 5.25 \ \frac{people}{mi^2}$

8 0

2 years ago