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lina2011 [118]
3 years ago
11

Which of these strategies would eliminate a variable in the system of equations? ​8x+8y=2 8x+5y=1 ​ Add the equations. (Choice B

) B Subtract the bottom equation from the top equation. (Choice C) C Multiply the top equation by 1/2,then subtract the bottom equation from the top equation.
Mathematics
2 answers:
harkovskaia [24]3 years ago
7 0

Answer:

B. Subtract the bottom equation from the top equation.

Step-by-step explanation:

When looking at the two equations:

8x + 8y = 2

8x + 5y = 1

We can easily get rid of the x variable by subtracting the two equations from each other since the terms are equivalent. This would allow us to solve for the y value, which we could plug into the an equation to solve for the x value.

Lady_Fox [76]3 years ago
6 0

Answer:

Subtract the bottom equation from the top equation.

Step-by-step explanation:

i made sure it was the answer which is in khan academy.

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svlad2 [7]
The order of operations is PEMDAS; which stands for Parenthesis, Exponents, Multiplication and Division, and Addition and Subtraction; this is the order used to solve expressions, equations, and inequalities.
5 0
3 years ago
Please help:
suter [353]

Answer:

A. 14:8 or 7:4

B. 14:6 or 7:3

C. 6:8 or 3:4

D. 6:28 or 3:14

Step-by-step explanation:

All you have to do is put the numbers in order and sometimes you can simplify it. It's pretty self-explanatory.

Hope this helps :)

5 0
3 years ago
F(x) = -7x - 1<br> f() = -8
xxMikexx [17]

Answer:

  f(1) = -8

Step-by-step explanation:

Apparently, you want the argument of the function such that the function value is -8. Fill in the given information and solve for x:

  -8 = -7x -1

  -7 = -7x . . . . add 1

  1 = x . . . . . . . divide by -7

Now, you know that ...

  f(1) = -8

3 0
3 years ago
After 2 females leave a party, there are twice as many males as females. Then 9 males leave and there are twice as many females
ira [324]

Answer: 9 people are left at the party

Step-by-step explanation:

There was originally 8 females and 12 males

8-2 = 6

Twice the males as females

9 men leave which leaves 3 men and 6 women which is twice as many men

Hope this helps!

8 0
3 years ago
If one gallon of paint covers 25 sq. ft., how much paint is needed to cover 40 sq. ft.? i will mark brainliest
gogolik [260]

Answer:

1.6 gallons (so if you can only buy by the gallon, 2 gallons)

Step-by-step explanation:

You divide the total area by how much a gallon covers to get the number of gallons needed.

40/25=1.6

8 0
3 years ago
Read 2 more answers
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