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3 years ago

Math question-Help PLEASE!

Mathematics

1 answer:

Dima020 [189]3 years ago

8 0

The answer is E. To find a line perpendicular to another, you have to take the reciprocal of the original slope. That will give you the slope of the new line. Then the intercept (in this case -2) stays the same.

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The coordinates below represent two linear equations.

marshall27 [118]

Look at the first line in the first problem.
x y
<span>–6 –6
–4 –3</span>
find the slope:
y2-y1 / x2-x1
-3+6 / -4+6
3 / 2
the slope is 3/2. now plug this into point-slope form, along with one of the ordered pairs. i'll use (-4,-3) because the numbers are smaller.
y-y1=m(x-x1)
y+3=3/2(x+4)
y+3=3/2x+6
y=3/2x+3

now do the same for the other line.
<span>x y
0 3
2 6
actually, this one's convenient, because it tells you the y-intercept is 3 (when an ordered pair has a 0 as its x coordinate, that means its on the y axis). so we just have to find the slope.
y2-y1 / x2-x1
6-3 / 2-0
3/2
the line is y=3/2x+3. it's the same line as before. that means there are infinitely many solutions, because there are an infinite amount of points where the lines "cross" each other (since they lie on top of each other).

follow the same procedure for the next problem. if the equations turn out to be the same, it has infinite solutions. if the two lines have the same slope but different intercepts, that means they're parallel, and have no solution since the lines will never intersect. if the lines have different slopes, they will have one solution. and it makes no sense for lines to intersect at two different points, so you can ignore that option altogether.

hope this helps
</span>

6 0

3 years ago

Question and options are in the picture!

True [87]

Answer:

answer is A

Step-by-step explanation:

please I need brainlist

7 0

2 years ago

Read 2 more answers

A shirt costs $34. Sales tax is 6%. What is the total amount including tax

ehidna [41]

Answer:

the answer is $36.04

Step-by-step explanation:

34 dived into 100= 0.34 times 6 equals 2.04 34+2.04=36.04

8 0

3 years ago

If you are able to do 5 pull ups now and after 4 weeks you are able to do 9 pulls ups. Write an equation that represents the num

pochemuha

Answer:

The equation that that represents number of pull ups $'y'$ i can do after $'x'$ weeks is $y=5+x$ .

Step-by-step explanation:

Given:

Number of pull ups at the beginning = 5

Number of pull ups after 4 weeks = 9

We need to write the equation for number of pull ups $'y'$ i can do after $'x'$ weeks.

Solution:

Now we will find the number of pull ups increased in 4 weeks.

number of pull ups increased in 4 weeks can be calculated by Number of pull ups after 4 weeks minus Number of pull ups at the beginning.

framing in equation form we get;

number of pull ups increased in 4 weeks = $9-5=4$

So we can see that;

in 4 weeks = 4 pulls increase

in 1 week = Number of pull ups able to do in 1 week.

By using Unitary method we get;

Number of pull ups able to do in 1 week = $\frac{4}{4}=1$

Now we can say that;

Let the number of pull ups you can do $'y'$ .

Let he number of weeks be $'x'$ .

So we can say that;

number of pull ups you can do after 'x' weeks is equal to Number of pull ups at the beginning plus Number of pull ups able to do in 1 week multiplied by number of weeks.

framing in equation form we get;

$y=5+x$

Hence The equation that that represents number of pull ups $'y'$ i can do after $'x'$ weeks is $y=5+x$ .

7 0

2 years ago

Help me pleaseeee????

DaniilM [7]

a-72km

b-99km

4-5in x 10in

5-1in=9ft

6 0

3 years ago