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irina [24]
2 years ago
10

Solve this put it in an equation and show your work

Mathematics
1 answer:
Dmitry_Shevchenko [17]2 years ago
7 0

Answer:

y = -\frac{5}{2}x +30

Situation: You start out with $30 and spend $2.50 every day on a soda.

Step-by-step explanation:

The equation of a line is y = mx + b

b = y-intercept

m = slope, rise/run

The line crosses the y axis at 30, so b is 30

Now for the slope, rise/run.

Start at 30 on the y-axis and go down to 25, that is a rise of -5. Now you are at (0, 25) on x-axis. Move right to the point (2, 25). The run is 2.

m = -5/2

The equation of the line is y = -5/2x + 30

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PLEASE HELP!!!Which statement is true? Select all that apply.
Fittoniya [83]

Answer:

"The relationship is proportional."

"The relationship is proportional."

"The equation of the line is y = -3x"

Step-by-step explanation:

First, a proportional relationship can be written as:

y = k*x

where k is called the constant of proportionality. (or the slope)

You can see that if we take x = 0, we have

y = k*0 = 0

Then this type of line always passes through the point (0, 0).

And in the graph you can see that this line does that, then:

"The relationship is proportional." is true.

We also can see that as x increases, the value of y decreases, this must imply that k is a negative number, then:

"The slope is negative." is true.

To find the value of the slope, we can take two points that belong to the line.

I will choose:

(0, 0) and (2, -6)

For the slope, we just take the quotient between:

Δy = -6 - 0 = -6  (the difference in the y-components)

Δx = 2 - 0 =  2   (the difference in the x-components)

the slope is:

k = Δy/Δx = -6/2 = -3

Then the slope is -3, and we can write the equation as:

y = -3*x

Then:

"The equation of the line is y = -3x" is true.

7 0
3 years ago
Which algebric expression represents "the sum of a number and 9
Lesechka [4]

Answer:

x + 9

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
A quart of paint covers 80 square feet. How many quarts should you buy to paint the ramp with two coats? (Assume you will not pa
Amanda [17]

Answer:

Step-by-step explanation:

Alright, lets get started.

We first need to find the surface area of the ramp without its base.

The ramp consists 4 sides two triangles and two rectangles.

Area of 1 triangle = \frac{1}{2}*14*6=42

Area of 2 triangle = 42

Area of top rectangle = 15.2*19.5=296.4

Area of back rectangle = 6*19.5=117

So total area =  42+42+296.4+117=497.4 square feet

We are asked to paint two coats of paint means we have to double the area.

So the double area is = 2*497.4=994.8

80 square feet requires = 1 quart of paint

994.8 square feet requires = \frac{994.8}{80}=12.435

12.4 quart can't be purchased so complete number of quart will be 13 quart.   :   Answer

Hope it will help :)

5 0
3 years ago
According to the image whats the answer? 30 points for brainliest!<br> PLEASE HURRY
marysya [2.9K]
The answer is 28 1/3 x 7x 12= 28
7 0
4 years ago
Hi its 1 am i have to many missing assignments anwser this for me lol thx!!&lt;3
qaws [65]

Answer:

20

Step-by-step explanation:

(-4) × (-5) = 20

Hope this helps

5 0
3 years ago
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