3 years ago

Y varies directly as x. y = –9 when x = 3 What is the equation? Find y when x = –15.

Mathematics

1 answer:

lyudmila [28]3 years ago

3 0

Answer: -3 = k

Step-by-step explanation: y/x = k is the equation.

Okay so you plug in y into that equation and x also. You should have the equation -9/3 = k. All you do is solve! You should get -3=k. I hope this helped! :D

You might be interested in

How to solve …….::::::::::

ValentinkaMS [17]

Simplify and evaluate

9) 6x^2 - 27 + 4x^3

10) -7x2 - 5x + 9

6 0

2 years ago

What is the slope of the line that passes through (2, 12) and (4, 20)?On the graph of the equation 3x + 2y = 18, what is the val

Paha777 [63]

Answer: The slope of the line that passes through (2, 12) and (4, 20) is 4.

The value of the y-intercept is 9.

Step-by-step explanation:

Slope of line passing through (a,b) and (c,d) = $\dfrac{d-b}{c-a}$

Then, the slope of the line that passes through (2, 12) and (4, 20) = $\dfrac{20-12}{4-2}$

$=\dfrac{8}{2}=4$

So, the slope of the line that passes through (2, 12) and (4, 20) is 4.

To find the y-intercept of 3x + 2y = 18, first write in slope intercept form y=mx+c ( where c= y-intercept ).

$2y=-3x+18\\\\\Rightarrow\ y=-\dfrac{3}{2}x+9$

By comparison, c= 9

Hence, the value of the y-intercept is 9.

4 0

3 years ago

Mark is in training for a bicycle race. He needs to ride 50 kilometers a week as part of his training. He rode 18.23 kilometers

kirill115 [55]

the answer is B-about 18km

7 0

3 years ago

Given triangle abc is an isosceles right triangle where angle b is the right angle and line bd is an angle bisector. Which postu

Leya [2.2K]

Answer:

angle bisector theorem

Step-by-step explanation:

the angle bisector theorem tells us that if an angle is cut by a bisector than it willl be equally cut and congruent

3 0

3 years ago

Hii please help i’ll give brainliest

Alinara [238K]

Answer:

X>3

Step-by-step explanation:

7 0

3 years ago