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exis [7]
2 years ago
7

On the way to visit her grandmother, Sally drove at an average speed of 85 mph. On the way home (taking the same route) she only

averaged 65 mph. If the total round trip took 18 hours, how many hours did it take Sally to drive to her grandmother's? Write your answer as a decimal.​
Mathematics
1 answer:
Romashka-Z-Leto [24]2 years ago
7 0

Answer:

7.8 hours

Step-by-step explanation:

We will use the formula:

distance =rate×time

We don't know the distance but it is the same distance going and returning. Two rate×time calculations will both equal that distance from Sally's to Grandma's. See image.

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True or false the angle
Ira Lisetskai [31]

Answer:

Second option: False

Step-by-step explanation:

You need to use the following identity:

sin\alpha=\frac{opposite}{hypotenuse}

Let be "x" the lenght of the buildings's shadow.

opposite=x (Lenght of building's shadow)

You can observe in the figure that:

\alpha=75\°\\\\hypotenuse=50ft

Substitute these values into  sin\alpha=\frac{opposite}{hypotenuse} and solve for ""x":

sin(75\°)=\frac{x}{50}\\\\(50)(sin(75\°))=x\\\\x=48.29\°

Therefore, the length of its shadow IS NOT 12.94 feet.

6 0
3 years ago
99,000 = how many tens
Ray Of Light [21]
99,000/10
Take away one zero from both numbers
9,900/1 = 9,900
9,900 tens, Hope this helps!
7 0
3 years ago
Pls help its last question I need this to get 80% if I don't I have to do it again​
Vikki [24]

Answer:

x = 7/9

i hope this is the answer you are looking for

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Scott has $82.50 in his checking account after he wrote checks to pay bills for $37.96, $52.00, $12.26, and $96.36. How much was
Talja [164]

Answer:

If im correct its $281.08

Step-by-step explanation:

So i added all the numbers

$37.95+$52.00 (etc.)

Then i added the first number to the total

$82.50+$198.58 ( those are all the numbers i added at the beginning.)

Then it should equal $281.08

He had $281.08 before he paid his bills.

8 0
4 years ago
What is the GCF of 24jk and 32jkm?
mr Goodwill [35]
The GCF of 24 and 32 is 8.

Hope this Helps!!
7 0
3 years ago
Read 2 more answers
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