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andreyandreev [35.5K]
3 years ago
10

I need to knowww nowwwww

Mathematics
1 answer:
mars1129 [50]3 years ago
6 0

Answer:

Stephanie.

Step-by-step explanation:

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By using Carl Gauss's clever formula, (n / 2)(first number + last number) = sum, where n is the number of integers, we learned how to add consecutive numbers quickly. We now know that the sum of the pairs in consecutive numbers starting with the first and last numbers is equal.

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The point (-2, -1) satisfies which of the following inequalities?
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3 years ago
Please solve this by solving systems by elimination<br><br><br>6x+3y=-18<br><br>7x+7y=0
gavmur [86]

Answer:

Step-by-step explanation:

6x + 3y = -18

Taking 3 common from left side

so, 3(2x+y) = -18

2x+y = -18/3

2x+y = -6 (equation 1)

and, 7x + 7y = 0

Taking 7 as commom from left side

7(x + y) = 0

x + y = 0/7

x + y = 0 (equation 2)

now , by using elimination method

subtracting equation2 from equation1

2x + y - (x + y)= -6 - 0

2x + y - x - y = -6

x = -6

so, x = -6

substituting value of x in equation 1

2(-6) + y = -6

-12 + y = -6

y = -6 +12

y = 6

hence, the value of x = -6

          and value of  y = 6

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3 years ago
How do you use equivalent rates in the real world?
kotykmax [81]
Cross multiplication
or multiplying by a number which goes in both rates
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3 years ago
What is the product of -3 and 5<br><br>it's on engenuity so I need answer​
Katarina [22]

Answer.........

-15

.______.

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