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adell [148]
3 years ago
8

I need help please its a test

Mathematics
2 answers:
mestny [16]3 years ago
8 0

Answer:

-3

Step-by-step explanation:

GREYUIT [131]3 years ago
4 0
The answer to the problem is -3
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Find the amount of the sales tax and the total cost. Cost of Item $200 Tax Rate 8​% How much is the sales​ tax? What is the tota
Mariulka [41]
Cost=$200
sales tax rate, r= 8%
tax=cost*r=$200*0.08=$16
total cost = cost+tax=$200+$16=$216

3 0
3 years ago
2) Line segment MK has endpoints at (2, 3) and (5, ?4). Segment M'K' is the reflection of MK over the y-axis. Which statement de
Marianna [84]

Answer:

Option C -M'K' is the same length as MK

Step-by-step explanation:

Given : Line segment MK has endpoints at (2, 3) and (5,4)

               M'K' is the reflection of MK over the y-axis

By definition of reflection: reflection of point (x,y) across the the y-axis is the point (-x,y)

which implies M'K' has end points (-2,3) and (-5,4)

Now, we find the length of MK

let (x_1,y_1)=(2,3)\\\\(x_2,y_2)=(5,4)

d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

⇒ d=\sqrt{(2-5)^2+(4-3)^2}

⇒d=\sqrt{9+1}

⇒d=\sqrt{10}   ....(1)

Now, we find the length of M'K'

let (x_1^{'},y_1^{'})=(-2,3)\\\\(x_2^{'},y_2^{'})=(-5,4)

d^{'}=\sqrt{(x_2^{'}-x_1^{'})^2+(y_2^{'}-y_1^{'})^2}

⇒ d^{'}=\sqrt{(-2+5)^2+(3-4)^2}

⇒d^{'}=\sqrt{9+1}

⇒d^{'}=\sqrt{10} .....(2)

from (1) and (2) we simply show that the length of MK and M'K' is equal

we can also refer the figure attached for reflection of MK and M'K'

therefore, Option C is correct


3 0
4 years ago
Read 2 more answers
What is this please help I'll give you a brainliest
scZoUnD [109]
(4,0) i think, it only makes sense since its a square
5 0
3 years ago
Read 2 more answers
Use a vertical number line to think about how to represent the situation below. Then, answer the question.
Butoxors [25]

Answer:

-4

Step-by-step explanation:

i just did it on edge and got it right

5 0
4 years ago
3x+7y=17
Dafna1 [17]

Answer:

(\frac{10}{3}, 1)

Step-by-step explanation:

1) In order to solve a system of equations with the elimination method, you need to add or subtract the two equations and "eliminate" variables by canceling out terms. This leaves you with an equation with only one variable to solve. Then, once you solve that equation, you can substitute the answer you got into one of the system's equations to find either the x or y value.

This problem already has one 3x in each equation, so let's focus on canceling that term out, eliminating the x variable. To set up this situation, we need one 3x to be negative, so let's multiply the terms in 3x-6y = 4 by -1, which gets us to -3x + 6y = -4. Now let's "cancel out" those x variables by adding them together.  (This work is shown in the first picture.)

Remember to add the other terms. This leaves us with the equation 13y = 13. By isolating y, we can find its value, which leaves us with y = 1.

2) Next, let's substitute 1 for y in one of the two equations. In this case, I used 3x + 7y = 17. Then, isolate x to find its value:

3x + 7 (1) = 17\\3x + 7 = 17 \\3x = 10 \\x = \frac{10}{3}

Therefore, the answer would be (\frac{10}{3}  , 1).

5 0
3 years ago
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