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3 years ago

A direct variation function contains the points (2, 14) and (4, 28). Which equation represents the function?

2 answers:

6 0

Direct variation mean x =ky so y = x/k

(2,14) mean y = kx so 14 = k*2 so 14 = 7*2 so 14 = 14
(4,28) mean y = kx so 28 = k*4 so 28 = 7*4 so 28 = 28

from these result that the 3rd choice is right sure

mash [69]3 years ago

6 0

y = 7x THIS IS THE ANSEWR

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Use angle relationships to complete the top equation. Then, solve for x and find the measure of both angles.

Blababa [14]

X = 20
4x + 30 = 110
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3 years ago

Steven wants to buy a $580 bicycle. Steven has no money saved, but will be able to deposit $30 into a savings account when he re

Bingel [31]

$30 + $30 = $60

$60 + $30 = $90

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Hope this Helps!!

8 0

4 years ago

Need help with this please.

sp2606 [1]

Answer:

$y = -\frac{3}{2} x + 4$

Step-by-step explanation:

First, let us find the gradient of AB:

Gradient of AB = $\frac{-1-3}{-1-5}$

= $\frac{2}{3}$

We also need to know that The product of gradients which are perpendicular to each other is -1. Using this idea, we can find the gradient of the perpendicular bisector:

(Gradient of perpendicular bisector)( $\frac{2}{3}$ ) = -1

Gradient of perpendicular bisector = $-\frac{3}{2}$

Now, we need to know at which coordinates the perpendicular bisector intersects AB. A perpendicular bisector bisects a line to two equal parts. Hence the coordinates of the intersection point is the midpoint of AB. Thus,

Coordinates of intersection = ( $\frac{-1 + 5}{2}$ , $\frac{-1 + 3}{2}$ )

= ( 2, 1 )

Now, we can construct our equation. The equation of a line can be formed using the formula $(y - y_{1}) = m(x - x_{1})$ where $m$ is the gradient and the line passes through $(x_{1} , y_{1} )$ . Hence by substituting the values, we get:

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

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

$y = -\frac{3}{2} x + 4$

4 0

3 years ago

29 more than t is equal to 1. What is the value of t?

cricket20 [7]

First, let's set up the equation:
"29 more than" is just
29+
"t" is
t
"equal to one" is
=1
put it all together to get
29+t=1
subtract 29 from both sides to get your answer:
t=-28

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3 years ago

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Alenkasestr [34]

Answer:

100

Step-by-step explanation:

10x10=100

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3 years ago

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