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Natasha2012 [34]
3 years ago
15

Help and explain !!!!( Solve using the substitute method )

Mathematics
1 answer:
alex41 [277]3 years ago
5 0

Answer:

x=13

y= -9

(13, -9)

Step-by-step explanation:

If we are solving using the substitution method, we can take the first equation and set it to y so y=4-x.

Then, we can take that equation and plug it into the bottom one so

3x+4(4-x)=3

Simplify:

3x+16-4x=3

-x=-13

x=13

We can then plug 13 into any of the two given equations (I am just going to plug it into the top one)

So, 13+y=4 which y= -9

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Please show your work on this and I’ll mark you brainliest!!
larisa [96]
F(x) = 3x^2 + 4x - 1

f(-3) = 3(-3)^2 + 4(-3) - 1

f(-3) = 3 * 9 - 12 - 1

f(-3) = 27 - 12 - 1

f(-3) = 15 - 1

f(-3) = 14
4 0
4 years ago
Leila says that 75% of a number will always be greater than 50% of any other number. Complete one inequality to support Leila's
babunello [35]
Supporting claim :
75% of 100 = 0.75 * 100 = 75
50% of 100 = 0.50 * 100 = 50
0.75(100) > 0.50(100) <== ur inequality

counter claim :
75% of -100 = 0.75 * -100 = -75
50% of -100 = 0.50 * -100 = -50
0.75(-100) < 0.50(-100) <== ur inequality


4 0
4 years ago
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Combine like terms to simplify<br> 3x + 2y + 4x - 6y
Leno4ka [110]

Answer:

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Step-by-step explanation:

7 0
3 years ago
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A model is made of a car. The car is 9 feet long and the model is 6 inches long. What is the ratio of the length of the car to t
velikii [3]

Answer:

B

Step-by-step explanation:

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Now we are told to get the ratio of length of car to length of model.

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4 years ago
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