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dlinn [17]
3 years ago
11

Write a question that matches this equation. 45 – n = 15

Mathematics
2 answers:
Dominik [7]3 years ago
3 0
15 + n = 45, hope you get it, thanks. When you take one number to the other side of the equal sign, you have to reverse the operation, according to Indian Math curriculum.
Marina CMI [18]3 years ago
3 0
"15 is equal to 45 minus what value, n?"
That is a very simple way of wording it. I think thats what you were asking for
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I need help with some problems. I can't get it to click into understanding.
N76 [4]

I'll go over part A.

What's happening is that we are plugging some unknown number x into the function, and getting -1 as the result. The function rule is 3*x-7 which translates to "multiply the input number by 3, then subtract off 7"

Notice how multiplication comes first and then we subtract. This is following the order of operations PEMDAS (some books may call it BEDMAS depending on your region). The M for multiplication comes before the S for subtraction.

To isolate x, we follow the order of operations in reverse. We undo the "subtract off 7" then we undo the "multiply by 3"

So this is how it all works out

f(x) = 3x-7

-1 = 3x-7 .... replace f(x) with -1

3x-7 = -1

3x-7+7 = -1+7 ... add 7 to both sides to undo the "-7"

3x = 6

3x/3 = 6/3 ... divide both sides by 3 to undo the "multiplication"

x = 2

Therefore, if the input is 2, then output is -1

------------------------------------------------------------

Let's plug x = 2 into the function and see what happens

f(x) = 3x-7

f(2) = 3*2-7 .... replace x with 2

f(2) = 6-7 .... multiply

f(2) = -1 .... subtract

The input x = 2 leads to the output -1

So this confirms that  x = 2 is the proper answer for part A

6 0
3 years ago
If i make 2230.80 per month, how much per hour for 40 hour work week
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2230.80 per month
=2230.80/4 = 557.70 per week
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7 0
3 years ago
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