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3 years ago

Twice a number is 16 more then 42.

Mathematics

1 answer:

saw5 [17]3 years ago

3 0

Let the number be x
2x-16=42
2x=42+16
2x= 58
x=29
not sure if it’s right!!

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Identify an equation in point-slope form for the line perpendicular to

Alchen [17]

Answer:

$y - 9 = \frac{1}{2}(x +3)$

Step-by-step explanation:

Given

Function; $y = -2x + 8$

Required

Find an equation perpendicular to the given function if it passes through (-3,9)

First, we need to determine the slope of: $y = -2x + 8$

The slope intercept of an equation is in form;

$y = mx + b$

Where m represent the slope

Comparing $y = m_1x + b$ to $y = -2x + 8$ ;

We'll have that

$m_1 = -2$

Going from there; we need to calculate the slope of the parallel line

The condition for parallel line is;

$m_1 * m_2 = -1$

Substitute $m_1 = -2$

$(-2) * m_2 = -1$

Divide both sides by -2

$m_2 =\frac{ -1}{-2}$

$m_2 =\frac{1}{2}$

The point slope form of a line is;

$y - y_1 = m_2(x - x_1)$

Where $(x_1,y_1) = (-3,9)$ and $m_2 =\frac{1}{2}$

$y - y_1 = m_2(x - x_1)$ becomes

$y - 9 = \frac{1}{2}(x - (-3))$

Open the inner bracket

$y - 9 = \frac{1}{2}(x +3)$

Hence, the point slope form of the perpendicular line is: 

 $y - 9 = \frac{1}{2}(x +3)$ 

3 0

4 years ago

Oliwia made a scaled copy of the following triangle. She used a scale factor greater than 111. What could be the height of the s

GaryK [48]

Answer:

c,d,e

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Find the volume of the pyramid.

andrey2020 [161]

Answer:

I believe it would be 1400

Step-by-step explanation:

If it is multiple choice this would probably be the best choice

4 0

3 years ago

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Cole said that 555 rounded to the nearest ten is 600. What's coles error?

ki77a [65]

Cole's mistake was that he rounded 555 to the nearest hundred instead of the nearest ten. He should've rounded it to 560 because the tens place is the second number, not the first one.

3 0

3 years ago

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HELP PLEASE assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2

DiKsa [7]

Y=k/x
1.6=k/0.5
K=0.8
Y=0.8/x
3.2=0.8/x
X=0.8/3.2
X=0.25
Hope this helps

4 0

4 years ago