Ask question

Ask question

All categories

2 years ago

12

If y varies directly as x and y = 9 when x = –3, find y when x = 40.

1 answer:

DedPeter [7]2 years ago

8 0

Answer:

y = -120

Step-by-step explanation:

Direct variation is

y = kx where k is a constant

9 = k(-3)

Divide each side by -3

9/-3 = k

-3 = k

y = -3x

Let x = 40

y = -3(40)

y = -120

You might be interested in

You received a $178 per month raise. That was a 5% increase. What was your monthly salary before the increase? Show work please

zzz [600]

Answer: 169.52

Step-by-step explanation

%increase which is 5% =100 x final - initial

---------------------

initial

the initial is $169.52

and the final $178

3 0

2 years ago

Use the listing method to represent the following set.

Dafna11 [192]

The answer is c bc x is 3 and more

7 0

3 years ago

Read 2 more answers

Solve the equation X3 equals -215

Novosadov [1.4K]

Answer..

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

Please help me with this

Gnoma [55]

Given:

The equation is:

$3^x\times 9=3^{2n-1}$

To find:

The value of n in terms of x.

Solution:

We have,

$3^x\times 9=3^{2n-1}$

It can be written as

$3^x\times 3^2=3^{2n-1}$

$3^{x+2}=3^{2n-1}$ $[\because a^ma^n=a^{m+n}]$

On comparing the exponents, we get

$x+2=2n-1$

Add 1 on both sides.

$x+2+1=2n-1+1$

$x+3=2n$

Divide both sides by 2.

$\dfrac{x+3}{2}=n$

Therefore, the value of n is terms of x is $n=\dfrac{x+3}{2}$ .

7 0

3 years ago

While walking his dog in the park, Santiago often finds change lying on the ground. This week, Santiago recorded the amount of m

choli [55]

Th y rn r my. D nI eh t

7 0

2 years ago