All categories

3 years ago

Y varies inversely with x. If y = -8 when x = -7, find the y when x=-4.

Mathematics

1 answer:

lora16 [44]3 years ago

8 0

Answer:

y =-14

Step-by-step explanation:

Inverse variation is of the form

xy = k where k is a constant

(-7)(-8) = k

56 = k

The equation is

xy = 56

Let x = -4

(-4)y = 56

y = 56/-4

y =-14

You might be interested in

12 divided by 1 1/5 plz hurry asap

makkiz [27]

Answer:

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Somebody please help .. What is the exact volume of this right cone ?

stiks02 [169]

$\bf \textit{volume of a cone}\\\\
V=\cfrac{\pi r^2 h}{3}~~
\begin{cases}
r=radius\\
h=height\\
-----\\
r=12\\
h=8
\end{cases}\implies V=\cfrac{\pi (12)^2(8)}{3}$

7 0

3 years ago

HELP ASAP:

tekilochka [14]

Answer:

Here's how I would do it.

Step-by-step explanation:

If two triangles are similar, corresponding sides are in the same ratio.

We know the measures of b and a, so we can calculate the ratio b/a.

d and b are in the same ratio, so

$\begin{array}{rcl}\dfrac{d}{c}& = & \dfrac{b}{a}\\d & = & c \times \dfrac{b}{a}\\\end{array}$

We know the measures of c, b, and a, so we can calculate the value of d.

5 0

3 years ago

Write a declaration for a variable channel that can hold tv channel numbers (1 to 900) and a variable hours_recorded that can ho

Mamont248 [21]

Int channel; double hours_ recorded;

6 0

3 years ago

If a population of 200 squirrels has a 10 percent growth rate each year, how many individuals will there be in the population af

Anarel [89]

For this case we have a function of the form:
y = A * (b) ^ t
Where,
A: initial amount
b: growth rate
t: time
Substituting values we have:
y = 200 * (1.10) ^ (t)
For 3 years we have:
y = 200 * (1.10) ^ (3)
y = 266.2
Rounding off we have:
y = 266
Answer:
there will be 266 squirrels in the population after 3 years

4 0

3 years ago