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aliina [53]
3 years ago
9

What is 8 1/2 +7 1/4= ?

Mathematics
2 answers:
Rzqust [24]3 years ago
7 0
15 3/4 would be the fraction answer
Oliga [24]3 years ago
5 0
The correct answer is 15.75
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torisob [31]

Answer:

see attachments

Step-by-step explanation:

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Pls help n explain what to do
monitta

Answer:

3

Step-by-step explanation:

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To find this do 9/12.

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Erica is participating in a road race. The first part of the race is on a 5.2-mile-long straight road-oriented at an angle of 25
kap26 [50]

Answer:

6.31 mi

Step-by-step explanation:

The diagram below explains the solution better.

From the diagram,

C = starting point of the race.

A = end of the first part of the race.

B = end of the race.

Using Cosine rule, we can find the straight-line distance between the starting point and the end of the race.

Cosine rule states that:

a^2 = b^2 + c^2 - 2bc[cos(A)]

where A = angle A = <A

Given that

b = 5.2 miles

c = 2.0 miles

<A = 115° (from the diagram)

Hence,

a^2 = 5.2^2 + 2.0^2 - 2*5.2*2.0[cos(115)]\\\\a^2 = 27.04 + 4 - 20.8[cos(115)]\\\\a^2 = 31.04 + 8.79\\\\a^2 = 39.83\\\\a = \sqrt{39.83}\\ \\a = 6.31 mi

The straight-line distance between the starting point and the end of the race is 6.31 mi

4 0
3 years ago
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