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Serggg [28]
3 years ago
14

15. 3- (-3) +7 – 4 = А. 12 в. 2 С. 9 D. 14

Mathematics
2 answers:
Aleonysh [2.5K]3 years ago
5 0

Answer:

C. 9.

Step-by-step explanati

3- (-3) +7 – 4 =

3 + 3 + 7 - 4          (- (- =  + )

= 13- 4

= 9.

Lisa [10]3 years ago
5 0
The answer would be C

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Kamila [148]

Answer:

Reason given in step 2. is incorrect. It should read; "Distributive Property."

Step-by-step explanation:

The reason given to go from :

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is NOT "Multiplication Property of Equality" because one is not multiplying both sides of the equality by a number. The property that is being used is the Distributive Property on the left side of the equation in order to remove the grouping symbols (parenthesis) performing the implied multiplication of the external factor times each term of the binomial in parenthesis.

8 0
4 years ago
The numbers x and y are inversely proportional. When the sum of x and y is 42, x is twice y. What is the value of y when x = -8?
dolphi86 [110]

Answer:

y= -4

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x+y=42.   We know that x plus y equals 42.

x=2y .   We also know that x equals twice y.

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x+14=42.   Now that we know what y equals, let's replace y with 14 from the original equation.

x=28.  Now that we know that x=28 and y=14, we know that y is always x/2.

When x=-8, we divide it by 2 and get, -4.

Not absolutely positive as this was all mental math, but hope this helps! :)

4 0
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Fynjy0 [20]

Answer:

Step-by-step explanation:j7/10. 7 divided by 10. And .7

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