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Agata [3.3K]
4 years ago
13

−(7 − 2x) + 7 = −7 solve for x

Mathematics
1 answer:
jekas [21]4 years ago
3 0
First, remove the parentheses

-7+2x+7=-7

Cancel the equal terms.

2x+7=0

Subtract 7

2x= -7

Divide both sides by 2

Final answer is:

X= -3.5
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Plz help this one is the last one of the day plz help
Juliette [100K]
We know 20% is 15
and now we find 80%

since 20% x 4 = 80%, we can multiply 15 by 4 to get 80% of 75

15 x 4 = 60

80% of 75 = 60
3 0
3 years ago
I figured out the first part but not B and C
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3 0
2 years ago
A washer and dryer cost $869 combined. The washer cost $81 less than the dryer. What is the cost of the dryer?
marysya [2.9K]
W+d=869
w=d-81
plug in
(d-81)+d=869
2d-81=869
+81 both sides
2d=950
÷2 both sides
d=475
dryer cost $475

let's check w=475-81
w=394
475+394=869
869=869
the solution is true :)


7 0
3 years ago
Read 2 more answers
Determine algebrically if f(x)=4x³-5x is odd or even function​
Gelneren [198K]

Answer:

Odd function

Step-by-step explanation:

So to see if a function is odd or even we need to plug in a negative x for x, so f(-x)=4(-x)^3-5(-x). This produces -4x^3+5x, which is the exact opposite of the original equation, so it is an odd function. If it were even, then the signs of the coefficients would be the same as the original function.

4 0
3 years ago
What is the mean of the values in the dot plot? Enter your answer in the box. A number line ranging from 15 to 25 with one dot o
solmaris [256]
The mean of a dataset is the all members of the dataset added together and then divided by the number of members in the set. From your description of the number line, I've created a list of members.

16, 17, 17, 17, 17, 19, 19, 19, 19, 21, 22, 22, 23, 25

Adding all members of this set up produces the value 273. There are 14 members in the set, so 273 / 14 = 19.5. Thus, the mean of the set is 19.5

4 0
3 years ago
Read 2 more answers
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