WILL GIVE BRAINLIEST!!!!!!! find the value of x. find the value of y. :)

Mathematics

1 answer:

Elodia [21]3 years ago

7 0

Answer:

Since a line is equal to 180 degree

you pick one that has the variable x in it.

For example: 5x=180

180/5=36

therefore x=36

2. 6x=180

180/6= 30

x=30

Step-by-step explanation:

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Ms.Graves gave her class 12 minutes to read. Carrie reads 5 1/2 pages in that time. At what rate, in pages per hour, did Carrie

miv72 [106K]

Answer: 27.5 pages per hour

Step-by-step explanation:

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3 years ago

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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,

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