2 years ago

8th grade math! Please help. timed test

Mathematics

1 answer:

jeka57 [31]2 years ago

3 0

Answer: c

Step-by-step explanation:

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Y is directly proportional to X

Zarrin [17]

y = kx

30 = 6k

k = 5

a) y = 5x

y = 5 × 12

b) y = 60

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2 years ago

The graph of a line passes through the points (0, -2) and (6.0). What is

9966 [12]

Answer:

$y=\frac{1}{3}x-2$

Step-by-step explanation:

The equation of a line is given in the form $y=mx+b$

Where

m is the slope with formula $m=\frac{y_2-y_1}{x_2-x_1}$

and

b is the y-intercept [y axis cutting point of line]

Given the two points (0, -2) and (6,0),

x_1 = 0

y_1 = -2

x_2 = 6

y_2 = 0

Now, we find m using formula:

$m=\frac{0+2}{6-0}=\frac{1}{3}$

Now we have

$y=\frac{1}{3}x+b$

Finding b, we plug in any (x,y) point. Lets put (6,0) and find b:

$y=\frac{1}{3}x+b\\0=\frac{1}{3}(6)+b\\0=2+b\\b=-2$

Thus,

equation of line = $y=\frac{1}{3}x-2$

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2 years ago

A sphere and a cylinder have the same radius and height. The volume of the cylinder is 21 meters cubed.

LenaWriter [7]

Answer:

28 meters cubed.

Step-by-step explanation:

Since we know that the volume of a sphere is 4/3 the volume of a cylinder, we can multiply 21*4/3. 21*4 will equal 84 and 84/3 would be 28. So the volume of the sphere would be 28 meters cubed.

5 0

2 years ago

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A rectangle is 25 in. long and 13 in. wide. What is the area of the rectangle? Enter your answer in the box as a fraction in sim

Anarel [89]

I hope this helps you

Area=length ×width

Area=25×13

Area =325

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2 years ago

The price of a stock decrease by 60 cents one week , decreased 10 cents the next week , and decreased another 20 cents the follo

r-ruslan [8.4K]

-60 + -10 + -20 = -90 / 3 = -30

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2 years ago

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