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Slav-nsk [51]
3 years ago
13

Using adding and substitution to find the value of x for the set of equations x-y=120 x+y=150

Mathematics
1 answer:
Ronch [10]3 years ago
5 0
X= 135 and Y = 15. Hope that helps!
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PLSSS HELPPPPP MEEEE I WILLL GIVVVEEE BRAINLIESTTTT!!!!!!
Ivenika [448]

Answer:

y = 3x - 9

Step-by-step explanation:

To write a line with a slope of 3, set the coefficient of x to be 3:

y = 3x

But notice, if we evaluate x when it is equal to 2, we get 2*3=6, but we want it to be -3. Therefore, we just subtract 9 from the equation:

y = 3x - 9

6 0
3 years ago
A tank pumps out liquid at a rate of 12 gallons every 20 days. What is the unit rate in gallons per week?
pashok25 [27]

Answer:

4.2

Step-by-step explanation:

simplify 12 and 20 to 6 and 10 then divide 6 by 10 and multiply by 7 to get the answer.

8 0
3 years ago
Solve all please, thank you!
Mariana [72]

Answer:

Step-by-step explanation:

5 0
3 years ago
Find a polynomial, which, when added to the polynomial 5x^2–3x–9, is equivalent to <br><br> x^2-5x+6
alexandr1967 [171]
So this is easy counting
so 5x^2-3x-9
we have 5 x^2's
-3 x's
-9

wat do we add to that to get
1 x^2's
-5 x's
+6
so we do each
5x^2+what=1x^2
subtract 5x^2
from both sides
what=-4x^2
first is -4x^2

then we have -3x to -5x
-3x+what=-5x
add 3x to both sides
what=-2x
second is -2x

-9 to 6
-9+ what=6
ad d9
what=15
last is 15
thereffor add -4x^2-2x+15

6 0
3 years ago
A scientist looks at a bacterium and a virus in a lab. The bacterium has a diameter of 10 Superscript negative 6 meters. The vir
timofeeve [1]

Step-by-step explanation:

The diameter of the bacterium is 10 times greater than that of the virus.

8 0
3 years ago
Read 2 more answers
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