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Over [174]
3 years ago
6

PLEASE HELP I JUST NEED TO KNOW HOW TO DO IT

Mathematics
2 answers:
RoseWind [281]3 years ago
7 0
Your answer should be x=7 and y=7
Brilliant_brown [7]3 years ago
5 0

Answer:

y=7, x=7

Step-by-step explanation:

They both equal y, so you can set the right part of the equations equal to each other

4x-21=2x-7

solve for x

2x-21=-7

2x=14

x=7

knowing x, we can now substitute back into one of the original equations to find y

y=4(7)-21=28-21=7

or

y=2(7)-7=14-7=7

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If f(x) = 3x²+2 and g(x)=x2-9, find (f- g)(x).
Solnce55 [7]

Answer:

Step-by-step explanation:

Depending on whether or not the g(x) is x^2 or 2x, I have both ways.

If g(x) is x^2 - 9...

--> (3x^2 + 2) - (x^2 - 9) = 2x^2 + 11

If g(x) is 2x...

--> (3x^2 + 2) - (2x - 9) = 3x^2 - 2x + 11

Hope this helps!

4 0
2 years ago
AYÚDENME!!!! T.T PORFA
Vitek1552 [10]

Answer:

Por el teorema de 30 grados en un triangulo rectangulo la linea roja es \sqrt{3} veces la longitud del cateto opuesto al angulo de de 30. Por tanto la linea roja será:

l=\sqrt{3}\times3\sqrt{3}=9

Luego

x=9-3=6

7 0
3 years ago
Every year,students at Memorial High school volunteer to clean local highway roadsides. Each club or team at the school is
arlik [135]
She has to clean 2.5
8 0
3 years ago
Read 2 more answers
Eighteen subtracted from half a number is 38.<br> Find the number.
Andrews [41]

Answer:

x=112

Step-by-step explanation:

x/2-18=38

first add +18

x/2=56

now multiply by 2

x=112


6 0
3 years ago
Consider the following function G(x) = 2 (x-3)<br><br><br> Find G(4) + G (5)​
NNADVOKAT [17]
Answer: 6

Solution: 2(4-3) + 2(5-3) = 8-6+10-6=6
4 0
2 years ago
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