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liberstina [14]
3 years ago
8

Help me someone!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
Julli [10]3 years ago
7 0
Substitute answers in, a = 3 and b = 2.

(3^2 - 2^2)/(3+2)
= (9-4)/5
= 5/5
= 1
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Use the substitution method to solve the system of equations choose the correct ordered pair
Gekata [30.6K]

Answer:

C. (4,28)

Step-by-step explanation:

The substitution method requires you to input a specified number in place of a variable. In this case, the variable 'x' should be replaced by the number 4. Using the order of operations, we know that multiplication should be applied before subtraction. When we replace 'x' with 4, we get the equation 'y=8(4)-4'. Multiplying 8 and 4 gives us 32. If we subtract 4 from 32, we get 28. The answer ends up being 'y=28'.

That is the first part of our solution. What we are actually looking for is an ordered pair. We know ordered pairs are written in the form (x, y). First, we need to find the 'x'. The 'x' has been given to us from the beginning, it is 4. Next is the 'y'. This is what we needed to find using substitution. We ultimately concluded that the 'y' is equivalent to 28. Therefore our ordered pair is (4, 28), the letter choice C.

I hope this helped you and that I clearly elaborated on the answer choice.

4 0
3 years ago
Find the percent of the number 35%of750
lara31 [8.8K]

Answer:

262.5

Step-by-step explanation:

35 percent * 750 =

(35:100)* 750 =

(35* 750):100 =

26250:100 = 262.5

5 0
2 years ago
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Answer quickly, please. I need this. I will give brainliest to whoever answers first. You also get 25 points for this
PilotLPTM [1.2K]
What is the question..?
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Explain how to find the coordinates of the focus of a parabola with vertex (0,0) and the directrix y=5
Ghella [55]
Keep in mind that, the directrix is "p" distance units away from the vertex, and the focus point is also "p" distance  units from the vertex but in the opposite direction, so in short the vertex is half-way between both of them.

in this case the vertex is at the origin, and the directrix 5 units above it, so that means the parabola is vertical and opening downwards, like the one in the picture below, and the focus point is 5 units the other way.

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2 years ago
Mrs. Jones got a new freezer. She plugged it in, and it began to get cold. The
Stella [2.4K]
The rate of change for one hour is 4°.
When you look at the problem it says the temperature dropped 24° in 6 hours . So if you divided 24 by 6 you get 4 which is the rate at which the temperature dropped per hour.
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