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aniked [119]
3 years ago
15

Use the substitution method to solve the system of equations. Please help me get this question right

Mathematics
1 answer:
vaieri [72.5K]3 years ago
7 0

Answer:  B (2,1)

You know what y is (x-1) so you substitute that for y in the other equation.

3x+ ((4)(x-1))=10

3x+4x-4=10

7x=14

x=2

Then put x=2 into y=x-1

y=2-1

y=1

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Simplify this expression, you are y years old. Your sister is 3 years older than you. Your uncle is 4 times older than your sist
uysha [10]

Answer:The simplified expression that represents the uncle's age is

4y + 12

Step-by-step explanation:

Let y represent your age.

Your sister is 3 years older than you. This means that your sister's age is y + 3

Your uncle is 4 times older than your sister. It means that the age of your uncle would be

4(y + 3)

The simplified expression that represents your uncle's age would be

4y + 12

8 0
3 years ago
Ignore my handwriting but here’s some math i need for tomorrow
Vitek1552 [10]

FYI - 14,15,16 are correct.

17. a) 7 (nearest integer), b) 6.8 (nearest tenth)

18. a) 14 (nearest integer), b) 13.8 (nearest tenth)

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6 0
3 years ago
F(x)=x^+4x+2 what is the average rate of change from x=3 to x=5
mars1129 [50]

Answer:

12

Step-by-step explanation:

f(x)=x^+4x+2 First, let's evaluate when x=3, x=4 and x=5.

f(3) = 3²+4(3)+2 = 9 + 12 + 2 = 23

f(4) = 4²+4(4)+2 = 16 + 16 + 2 = 34

f(5) = 5²+4(5)+2 = 25 + 20 + 2 = 47

Now, let's find the rate of change.

34 - 23 = 11

47 - 34 = 13

Finally, the average rate of change.

(11 + 13) / 2 = 12

8 0
3 years ago
Describe the main parts of a proof.
Leya [2.2K]

Answer:

ok i want to help but wdym by a proof

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3 years ago
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astraxan [27]
<span>20.52 m2 is the answer im pretty sure hope it helps

</span>
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3 years ago
Read 2 more answers
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