Answer: A
The y-intercept is 43, which means that at 0 hours it was 43 degrees. The slope is -2 so it means that the temperature is decreasing at a rate of 2 degrees per hour.
Answers:
x = 8
y = 15*sqrt(2)
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Explanation:
This is a 45-45-90 triangle. The right triangle is isosceles.
This means the two legs 3x-9 and x+7 are the same length
3x-9 = x+7
3x-x = 7+9
2x = 16
x = 16/2
x = 8
If x = 8, then each leg is...
3x-9 = 3(8)-9 = 24-9 = 15
x+7 = 8+7 = 15
Each leg is 15 units long to help confirm we have the correct x value.
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The hypotenuse y is exactly sqrt(2) times that of the leg length.
Therefore, y = 15*sqrt(2) since earlier we found each leg is 15 units long.
15*sqrt(2) = 21.213 approximately
Answer:
no solution.
Step-by-step explanation:
The given equation is


On simplifying, we get

Squaring both sides

Subtract b from both sides

On simplifying, we get

Squaring both sides

Now, we substitute this value in the original equation

Hence, b = 81 is an extraneous solution.
Therefore, the given equation has no solution.
8.5% if you divide it or if you round it correctly
Answer: x = 2
Step-by-step explanation:

subtract 5

Combine like terms;

Divide by -5
