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Svet_ta [14]
2 years ago
12

Find the direct variation equation

Mathematics
2 answers:
Kaylis [27]2 years ago
8 0

Answer:

20

Step-by-step explanation:

if y varies directly with x, then it takes the form y=mx

to find m, substitute in the values of x and y to get 35=m*7 and simplify to get that m=5

then the equation becomes y=5x

substitute in the value they gave for x which is 4 to get y=5*4

to get that y=20

joja [24]2 years ago
6 0

Answers:

  • The direct variation equation is y = 5x
  • If x = 4, then y = 20

=================================================

Explanation:

Let's say that the letter k replaces the green box

We have the equation y = kx

Plug in (x,y) = (7,35) to get the equation 35 = k*7

Dividing both sides by 7 leads to k = 5

Therefore, the direct variation equation is y = 5x

We can check this by plugging in x = 7

y = 5x

y = 5*7

y = 35

So x = 7 leads to y = 35 as expected.

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

Do the same for x = 4

y = 5x

y = 5*4

y = 20 when x = 4

Side note: direct variation equations always go through the origin.

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Answer:

The area of the pizza with a diameter of 18 inches is 254.34 inches.

Step-by-step explanation:

The formula to find the area of a cirlce is A = pi x r^2 or pi times radius squared.

Second, we need to find our radius. To find the radius we need to divide the diameter by 2 to get the radius. In this case; 18 divided by 2 is 9.

Then, we need to plug the radius in the formula:

A = 3.14 x 9^2

9 squared or 9 times 9 equals 81

Next, multiply 81 by 3.14 and you get 254.34

Lastly, add the units of measurement, which would be inches.

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2 years ago
From the given slopes of the lines, identify whether the two lines are parallel, perpendicular, or neither.
vivado [14]

Answer:

Neither

Step-by-step explanation:

To be parallel the lines have to have the same slope. In this case the slopes are not the same.

To be perpendicular, the lines have to have negative reciprocal slopes.

For example, if one slope is 6, then its negative reciprocal i (- 1/6). We do not have this also.

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7 0
3 years ago
Read 2 more answers
What’s the answer to this
grigory [225]

Answer:

A.  x = -5/6  and  x = 1/2.

Step-by-step explanation:

12x^2 + 4x - 5 = 0

Use the 'ac' method to try to factor this:

Consider the above highlighted numbers:

12 * -5 = -60.

Now we need 2 numbers whose product is -60 and whose sum is +4.

They are -6 and +10, so we replace the + 4x by -6x + 10x:

12x^2 - 6x + 10x - 5 = 0   Now factor by grouping:

6x(2x - 2) + 5(2x - 1) = 0   The 2x -1 is common, so:

(6x + 5)(2x - 1) = 0

So x = -5/6  and  x = 1/2.

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3 years ago
Answer ASAP PLEASE WILL MARK BRAINLIEST
NARA [144]

Answer:

Answer should be A

Step-by-step explanation:

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4 0
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jok3333 [9.3K]

Answer:

12

Step-by-step explanation:

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12

3 0
3 years ago
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