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Sav [38]
3 years ago
11

Please help me 10 points

Mathematics
2 answers:
denis-greek [22]3 years ago
7 0

In step 2 multiply what is inside the parenthesis by 7 (distributive property):

7 * x = 7x

7 * 3 = 21

In step 3 subtract -7x on both sides of the equation.  (Property of subtraction of equality)

Then -7x + 4x = -3x

7x-7x + 21 = 21


In step 4, both sides of the equation are divided by -3.  (owned by the equality division)

So:

-3x / -3 = x

-21 / -3 = 7

Recall that the division of equal signs results in a positive number.

ASHA 777 [7]3 years ago
5 0
So on number 2 u can put 7x-3 equals -21
and on number 3 u can put that you need to subtract the 7 from both sides so thats where you get -3 on the left side and on number 4 you can put that you need to divide by negative 3 to get the answer which is 7
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Answer this question please and thank you
baherus [9]

Step-by-step explanation:

8 = 2^3

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13= 13^1

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3 years ago
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ANTONII [103]

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it is given that , 1 kilometer = 0.6214 miles

and 1 gallon = 3.78 liter

so

R = 35 (miles/gallon) (1 kilometer/0.6214 miles) (1 gallon/3.78 liter)

R = (35) (1/0.6214) (1/3.78) (miles x 1 kilometer/1 miles) (1 gallon/(1 gallon x 1 liter))

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OLga [1]

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Let the amount of sea water be W and the amount of salt be S.

This means that:

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=> W = kS

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2 liters of sea water contain 70 grams of salt Therefore:

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vazorg [7]

Answer:

O C. 0

Step-by-step explanation:

What is the sum of 15 and its additive inverse?

In Mathematics, the additive inverse of a number is defined as the number that when it is added to a specific number equals 0

From the above question, the additive of 15 = -15

Therefore, the sum of 15 and its additive inverse is calculated as:

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alisha [4.7K]

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