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Nina [5.8K]
3 years ago
7

Hong drove 648 miles in 9 hours.

Mathematics
2 answers:
ioda3 years ago
6 0

Answer:

864 miles

Step-by-step explanation:

648/9 = 72 mph

72 x 12 = 864

koban [17]3 years ago
3 0

Answer:

he drive 864 miles

Step-by-step explanation:

\frac{648}{9}  \times 12 = 864miles

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S_A_V [24]

Answer:

5

Step-by-step explanation:

You need to set up and solve a system of linear equations here.

Let s and a represent the number of students and adults respectively.

Then s + a = 9, and s = 9 - a.

Total ticket cost for the adults was ($8/adult)(a)

and for the students ($5/student)(s).

Total cost of the tickets was then  ($8/adult)(a) + ($5/student)(s) = $60.

Then our system of linear equations is:

8a + 5s = 60

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8a + 5(9 - a) = 60.

Then 8a + 45 - 5a = 60, or 3a = 15.

Solving for a, we get a = 5.

Solving for s using s = 9 - a, we get   s = 9 - 5, or s = 4.

There were 5 adults in the group (and 4 students).

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3 years ago
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147,456

Step-by-step explanation:

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Find the derivative of f(x) = -12x2 + 9x at x = 6.<br> a) -112.5<br> b)-135<br> c)90<br> d)108
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hi

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3 years ago
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