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2 years ago

I really need help. Evaluate each expression for g = -7 and h = 3 and match it to its value.

Mathematics

1 answer:

neonofarm [45]2 years ago

7 0

9514 1404 393

Answer:

10
46
2
-21
-10
-4

Step-by-step explanation:

Put the numbers where the letters are and do the arithmetic.

h - g = 3 - (-7) = 3 + 7 = 10

g² - h = (-7)² -3 = 49 -3 = 46

g + h² = -7 +3² = -7 +9 = 2

gh = (-7)(3) = -21

g - h = -7 -3 = -10

g + h = -7 +3 = -4

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harkovskaia [24]

Answer:

A) speed = 10.5 miles per hour

B) Time taken by him = 1.714 hours

C) Distance = 10.5 mph × 7 hours = 73.5 miles

Step-by-step explanation:

Given as :

The distance cover by David = $\frac{21}{4}$ miles = 5.25 miles

The time taken by David = $\frac{1}{2}$ hours = 0.5 hours

Let the speed = x mile per hour

So, Distance = Speed × Time

A)or, Speed = $\frac{Distance}{Time}$

Or, Speed = $\frac{5.25}{0.5}$

∴ speed = 10.5 miles per hour

<u>B) Again The Distance cover by him = 18 miles</u>

SO, with speed 10.5 miles per hour

The Time taken by him = $\frac{Distance}{speed}$ hours

Or, Time taken by him = $\frac{18}{10.5}$ hours

∴ Time taken by him = 1.714 hours

<u>C) Again the Time taken by him = 7 hours </u>

So, Distance cover by him with speed 10.5 mph

Or, Distance = 10.5 mph × 7 hours = 73.5 miles

A) speed = 10.5 miles per hour

B) Time taken by him = 1.714 hours

C) Distance = 10.5 mph × 7 hours = 73.5 miles Answes

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3 years ago

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Andrej [43]

The domain is {-8}
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Step-by-step explanation:

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