<u>Answer:</u>
<em>First Equation → </em><u><em>y = 21/4</em></u>
<em>Second Equation → </em><u><em>x = -1/57</em></u>
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<u>Explanation:</u>
<em>solving equation #1</em>
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step 1 - simplify
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step 3 - multiply each side of the equation by six

step 4 - add three to both sides of the equation.

step 5 - add three y to both sides of the equation.

step 6 - simplify

step 7 - divide both sides of the equation by four

Therefore, the solution to the first given equation is <u><em>y = 21/4 </em></u><em>or y = 5.25.</em>
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<em>solving equation #2</em>
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step 1 - simplify.

step 2 - multiply each side of the equation by five.

step 3 - subtract twenty x from each side of the equation.

step 4 - divide each side of the equation by negative nineteen.

step 5 - switch

Therefore, the solution to the second equation is <em><u>x = -1/57.</u></em>
Answer:
After 2 hours: -6°C.
After 5 hours: -15°C.
After
hours: -1.5°C
1 hour ago: 3°C.
3 hours ago: 9°C.
4.5 hours ago: 13.5°C.
To find these values, you simply need to multiply the hours elapsed by 3°C. Subtract from 0°C for future temperatures, and ADD to 0°C for the past.
Let's say you are solving for the temperature in 5 hours. All you need to do is:
3°C× 5= 15°C. 0°C-15°C= -15°C
For the temperature 3 hours AGO, what you will need to do instead is:
3°C×3= 9°C. 0°C+ 9°C= 9°C.
The correct answer is B.
Find the slope using the formula m= y2-y1 / x2-x1. You will get 11.50/2, which is p = $5.75 per hour.
5z>15-----subtract 2 on both sides
z>3----divide by 5
therefore, z must equal -10, or -4