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Aleksandr [31]
4 years ago
12

-4x+y= 6 -5x-y=21 what is the answer​

Mathematics
1 answer:
bekas [8.4K]4 years ago
6 0

Answer:

x=15

Step-by-step explanation:

21-6=15

-4x+y=-5x-y=15

x+y=-y=15

x=15

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if the humpback whales had traveled at the same rate for 32 days,how many more miles would the have traveled than the grey whale
Nataliya [291]

Answer:

192 miles more than the gray whales.

Step-by-step explanation:

first, get the rate of each whale per day. To put it in simpler terms, divide 2,240 miles by 28 to find how much the humpback whales travel in a day. next, do the same for the gray whales. I got that the humpback whales traveled 80 miles in a day and the gray whales traveled 74 in a day. Multiply 80 miles by 32 days to get the distance the humpback whales travel in 32 days (2,560 miles). Since you know the distance the Gray whales traveled in 32 days, you do not need to solve for it. Subtract 2,560-2,368 and you get 192 miles.


Hope this helped. If you can, label this answer as brainliest. Dont hesistate to ask if you have any questions. <3

6 0
3 years ago
Read 2 more answers
Help me please and maybe explain how you go the answer
gregori [183]

Answer:

C.  x + 2y = 10

   -4x - y = 2

Step-by-step explanation:

A. quickest way is to plug in -2, 6  and see which one works

B. this is the other way

1. x + 2y = 10

-4x - y = 2

2. multiply 4 with  x + 2y = 10 so i can get 4x + 8y = 40

i want +4x so i can cancel with the -4x in  -4x - y = 2

3.

4x + 8y = 40

-4x - y = 2

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

7y = 42

y = 6

4. then plug in 6 into an equation to get x

-4x - y = 2

-4x -6 = 2

-4x = 8

x = -2

3 0
3 years ago
If f(x)=2x+1 and g(x)=x2-7find(f+g)(x)
docker41 [41]

Answer:

x^2+2x -6

Step-by-step explanation:

f(x)=2x+1

g(x)=x^2-7

(f+g)(x)= 2x+1+x^2-7

Combine like terms

      = x^2+2x -6

7 0
3 years ago
Read 2 more answers
Identify the property used in this equation: (–2) + 6 + 1 = 1 + 6 + (–2)
ruslelena [56]
(-2) + 6 + 1 = 1 + 6 + (-2)
-2 + 7 = 7 - 2
5 = 5
7 0
4 years ago
Help please uh yes please
Ivan

Answer:

D

Step-by-step explanation:

4 1/2, square root of 24, 5, 5.1

4 0
3 years ago
Read 2 more answers
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