2 years ago

Solve system by Substitution method, provide steps. y = 5x - 18 -5x+6y = 17

Mathematics

1 answer:

Sedaia [141]2 years ago

5 0

Answer:

x=5

Step-by-step explanation:

-5x+6(5x-18)=17

-5x+30x-108=17

25x-108=17

25x=17+108

25x=125

x=5

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tangare [24]

Answer:

x>29

Step-by-step explanation:

Multiply each term by -1

-x * -1 < -29 * -1

x > 29

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How do you use equivalent rates in the real world?

kotykmax [81]

Cross multiplication
or multiplying by a number which goes in both rates

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Value of x is 3.2x-9.6=38.4?

Svetradugi [14.3K]

Answer:

The steps that can be done to both sides of the equation is: Add 9.6, then divide by 3.2

Step-by-step explanation:

Solve the equation:

$3.2x - 9.6 = 38.4$

-First you add both sides 9.6:

$3.2x -9.6 +9.6 = 38.4 +9.6$

$3.2x = 48$

-Then, you divide both sides by 3.2:

$\frac{3.2x}{3.2} = \frac{48}{3.2}$

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3 years ago

15% of 90 hours<br> 15% of 90 hours

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Answer:

15 percent of 90 hours = 13.5 hours

What is 15% of 90?

Y is 15% of 90

Equation: Y = P% * X

Solving our equation for Y

Y = P% * X

Y = 15% * 90

Converting percent to decimal:

p = 15%/100 = 0.15

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A train traveled 325 miles in 5 hours. What was the train's average rate of speed in miles per hour?

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65 miles per hour

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