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sergiy2304 [10]
3 years ago
15

the variables x and y vary inversely with a constant variation of 7. Use the variation formula, k=xy, to find why when x=9

Mathematics
1 answer:
dolphi86 [110]3 years ago
7 0

1.Make y the subject

k = xy

k/x = xy/x

y = k/x

2.Substitute

y = k/x

y = 7/9

y = 0.777......

y = 0.8 (Answer)

To confirm

k = xy

k = 9 × 0.8

k = 7.2

k = 7 (constant)

Hope it helps☺

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UkoKoshka [18]
2,100 quarts could be made in 12 hours. The rate for that day was 175 quarts every hour. We get this by dividing 350 by 2.
8 0
3 years ago
Un círculo tiene un radio de 5 cm. ¿Cuántos <br><br>centímetros mide su circunferencia?
denpristay [2]

Answer:

10\pi[/tex]

Step-by-step explanation:

Circunferencia de un círculo = Pi veces diámetro

como el diámetro es igual a la mitad del radio, sabemos que si multiplicamos el radio por dos obtendremos el diámetro del círculo. Por lo tanto, 5 veces 2 = 10. Ahora hacemos 10 veces pi. El cual es 10 pi o 31.4159

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8 0
3 years ago
A and b are positive integers. Find −2a+3b if a^3 b^2=72.
Alexxx [7]
The answer for "-2a + 3b" is 5.

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Now you fill in for "a" and "b". "-2*2 + 3*3" before adding you do all the multiplying, which leaves "-4 + 9". Combining like terms gives you 5.

I hope this helps!!
3 0
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6. Find the area of each figure, round your answer to
Diano4ka-milaya [45]

Answer:

Here you go

Step-by-step explanation:

A. 4070

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c. 410

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3 years ago
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