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3 years ago

What is a unit rate?

Mathematics

1 answer:

Ksivusya [100]3 years ago

5 0

Answer:

A unit rate is something over a unit of something else.

Such as: (50 miles) / hour

If you have (150 miles) / 3 hours

This is not a unit rate, therefore you have to divide the top and bottom by 3 to get the unit rate

(150/3 miles) / (3/3 hours)

(50 miles) / hour

Hope this helps :)

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Find the first, fourth, and eighth terms of the sequence. A(n) = −3 ∙ 2^x − 1

Sedbober [7]

$\bf A(n)=-3\cdot 2^{n-1}\\\\
-------------------------------\\\\
\textit{first one}\qquad A(1)=-3\cdot 2^{1-1}
\\\\\\
\textit{fourth one}\qquad A(4)=-3\cdot 2^{4-1}
\\\\\\
\textit{eighth one}\qquad A(8)=-3\cdot 2^{8-1}$

8 0

3 years ago

given the midpoint of segment KL is M (1, -1) and L (8 ,-7) what are the coordinates of the other endpoint K

andrey2020 [161]

The answer is (-6, 5) for K.

In order to find this, we must first note that to find a midpoint we need to take the average of the endpoints. To do this we add them together and then divide by 2. So, using that, we can write a formula and solve for each part of the k coordinates. We'll start with just x values.

(Kx + Lx)/2 = Mx

(Kx + 8)/2 = 1

Kx + 8 = 2

Kx = -6

And now we do the same thing for y values

(Ky + Ly)/2 = My

(Ky + -7)/2 = -1

Ky + -7 = -2

Ky = 5

This gives us the final point of (-6, 5)

7 0

3 years ago

Read 2 more answers

X / x-2 + x-1 / x+1 = -1 Im really confused, please show all steps

Yakvenalex [24]

I cant access paper right now so i can only give the answer

x= 0,1

3 0

3 years ago

Which equation can be used to solve for in the following diagram?

g100num [7]

Answer:

Choice C should be the answer

Step-by-step explanation:

Because all of them adds up to 180 since it is a straight angle.

6 0

3 years ago

from the top of a tree the angle of depression of a rock on the ground is 49 degrees. If the tree is 18.5 m tall, how far is the

Rashid [163]

Answer:

Step-by-step explanation:

If you were to sit in the very top of said tree and look directly straight, your line of vision would be parallel to the ground. The angle of depression is in between your line of vision and the rock. When you look down at the rock, your line of vision to the rock is a transversal between the 2 parallel lines. With this being the case, the angle of depression is alternate interior with the angle made on the ground from the rock to the top of the tree. See the illustration I attached below.

We are looking for the distance on the ground between the tree and the rock, which we will call x. The side opposite the reference angle is the height of the tree and the side adjacent to the reference angle is x. Side opposite over side adjacent is the tangent ratio. Therefore,

$tan(49)=\frac{18.5}{x}$ and

$x=\frac{18.5}{tan(49)}$ and on your calculator in degree mode, you will find that

x = 16.08 m

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4 0

4 years ago