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Hatshy [7]
3 years ago
6

Solve the system of linear equations by adding or subtracting.

Mathematics
1 answer:
Fantom [35]3 years ago
8 0

Answer:

3x + 7y = −17

4x − 7y = 10

Add up both sides of 2 equations, then

7x = -7

=> x = 1

=> y =(3 x 1 - 17)/7 = -14/7 = -2

Hope this helps!

:)

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Factorize the following expression ab-a-b+1
dolphi86 [110]

Group 'em together

a b − a + 1 − b

a b − a = a ( b − 1 )

Notice that there will be a 1 as without it it'll simply be  ab

1 − b = 1 ( 1 − b )

Notice that it doesn't match with the upper one... so we'll change the signs

1 ( 1 − b ) = − 1 ( b− 1 )

(try to multiply them now!!

Jot them down in one expression

a ( b − 1 ) − 1 ( b − 1 )

You get!!!!!!

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5 0
3 years ago
Are these fractions equivalent or nonequivalent?<br> 4x/7y 8x/14y
ivann1987 [24]

Answer:

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6 0
3 years ago
Find the equation of the line that contains the points P1(-4,8) and P2(-6,8)...
olga_2 [115]
The equation would just be x=8 since the x of both points is 8. 
6 0
3 years ago
<img src="https://tex.z-dn.net/?f=2x-y%3D4%5C%5Cy-x%3D4" id="TexFormula1" title="2x-y=4\\y-x=4" alt="2x-y=4\\y-x=4" align="absmi
Flura [38]
Here is the answer. Hope this helps!

5 0
2 years ago
If a bag contains 12 quarters, 6 dimes, and 18 nickles, what is the part-to-whole ratio of nickles to all coins?
zepelin [54]

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3 0
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