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Soloha48 [4]
3 years ago
12

Four times the first number minus three times the second number is 2. Two times the first number increased by three times the se

cond is 10. Find both numbers.
Mathematics
1 answer:
Eddi Din [679]3 years ago
4 0

Answer:

First number is -2.5

Second number 5

Step-by-step explanation:

Four times the first number minus three times the second number is 2.

To represent this statement, 4x -3y =2

Two times the first number increased by three times the second is 10.

To represent thsi statement, 2x+ 3y = 10

4x - 3y = 2

2x + 3y =10

4x - 2x = 2x

2x = -5

x= -2.5

The first number is -2.5

By using Substitution

2x + 3y = 10

2(-2.5) + 3y = 10

-5 + 3y = 10

3y = 10 +5

3y =15

y = 5

The second number is 5

....To check my answer

-5 + 15 = 10

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A plane begins to descend from a height of 202 meters. The plane decreases in altitude at an average rate of 1.8 meters per seco
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3 0
3 years ago
Tommy can lay a brick walkway by himself in 12 hours. Robert does the same job in 10 hours.
Lapatulllka [165]

Answer:

5 5/11 hours

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So, there is a trick to doing this.

You would first need to get their work rate into the same measurements.

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8 0
3 years ago
Dave spent 21 minutes completing a race. He walked 9 minutes and jogged the rest. What
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6 0
3 years ago
I just need 5 please help show work and I’ll give brainliest
Ostrovityanka [42]

Hello from MrBillDoesMath!

Answer:

See Discussion below

Discussion:

A function f is even if f(-x) = f(x)


f(x)                               f(-x)                                  Are they equal?

----------------------------------------------------------------------------------------

-x^8 + 2x^6-5x           -(-x)^8 + 2(-x)^6 + 5x         No

3 abs(x) - 4                 3 abs(-x) -4                       Yes

log5 x^2                     log5 (-x)^2                        Yes

(6x)^ (1/7)                     (-6x)^(1/7)                          No

e^(x^2-x)                     e^( (-x)^2+x)                      No

(x^8 +5x^2)^(-1)           ( (-x)^8 + 5 (-x)^2) ^(-1)      Yes


Answers with Yes, above are even functions.

Regards,  

MrB

P.S.  I'll be on vacation from Friday, Dec 22 to Jan 2, 2019. Have a Great New Year!


6 0
3 years ago
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