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4 years ago

Which equation, in point-slope form, represents a line with m=-15 that goes through the point (7,-1)?

Mathematics

1 answer:

Vikentia [17]4 years ago

3 0

Answer:

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

Here m = - 15 and (a, b) = (7, - 1), thus

y - (- 1) = - 15(x - 7), that is

y + 1 = - 15(x - 7) → D

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!!!!SHOW WHY IT IS CORRECT PLEASEEE!!!! \and please don't steal the points :(

jek_recluse [69]

Answer: Its correct because 3(2t+d) = 6t + 3d are equal.

Step-by-step explanation:

First we need to solve the equation

3( 2t+d ) = 6t + 3d //// Do some distributive property

6t + 3d = 6t + 3d //// Do you see it . . . They are equal to each other.

So its true.

4 0

3 years ago

Read 2 more answers

Lamy can paint 84 portraits in 6 weeks. at this rate , how many portraits can he paint in 2 weeks

lilavasa [31]

Answer:

28 portraits

Step-by-step explanation:

Let's first figure out how many portraits Lamy can paint in 1 week, which is his unit rate. To calculate this, we just have to divide the number of portraits he paints by the amount of time it takes him to paint them.

In this case, the former quantity is 84 portraits, and the latter quantity is 6 weeks, so his unit rate is $\frac{84 \text \: portraits}{6 \text \: weeks}$ = 14 paintings per week.

Now, we know that in 1 week, Lamy can paint 14 portraits. Therefore, since this is a directly proportional relationship, all we have to do to find how many portraits he can paint is 2 weeks is double the unit rate. This is because in a directly proportional relationship, if you multiply one variable by a number, you have to multiply the other by the same number to maintain equality, and here we are multiplying weeks by 2 so we need to multiply paintings by 2 as well.

Thus, Lamy can paint 14 · 2 = 28 paintings in 2 weeks.

Hope this helps!

7 0

2 years ago

Can you get the answer then you win

Katyanochek1 [597]

Number one is 5

I think number two is 21

Don’t trust me if u don’t trust me .
I’m in sixth grade

7 0

2 years ago

Read 2 more answers

The volume of a cube can be found using the equation V = s^3, where V is the volume and s is the measure of one side of the cube

Nina [5.8K]

This is confusing , sorry I cannot help

5 0

3 years ago

Sunhee had four plastic shapes a square, a circle, and a pentagon in how many ways can she line up the four shapes of the circle

julsineya [31]

Answer:

only three shapes are mentioned.

But anyhow, 4 shapes allow the following reasoning...

you can start lining up with any of the for shapes, so you have 4 possibilities, for the second position you have 3 possibilities, for the third 2 and for the last only 1.

so 4*3*2*1= 24 possible ways

but with the added rule to keep the circle and the square apart, we have to reduce the number.

by the same step-by-step reasoning we get

4 possibilities for the 1st item

only 2 possibilities for the 2nd item

(if 1st is square or circle, the other one's not an option, if it's not we have to choose one of them to not place them both at point 3 and 4)

only 1 choice for the 3rd item

(reasoning as above, if 2nd is square or circle, we have to the only other, if it isn't, we can put it here at 3rd position)

plus scenarios where either square or circle are on 1st point, the other's on 4th.

I guess that makes 14 possible arrangements

5 0

3 years ago