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3 years ago

Math help please.. number 13

Mathematics

1 answer:

Lerok [7]3 years ago

4 0

Use the Law of Cosines here with angle A as your reference angle. It will be the one that the helicopter is at, the one we are looking for. If that angle is angle A, then the side across from it is a, measure of 11.4. Here's how the Law looks in our particular situation: $(11.4) ^{2}=(7.4) ^{2} +(8.5)^2-2(7.4)(8.5)cos(A)$ . Simplifying a bit we get 129.96 = 54.76 + 72.25 - 125.8cos(A) Combining like terms across the equals sign gives us 2.95 = -125.8 cosA. Doing the division we get -.0234499205 = cosA. Find the angle using the 2nd and cos buttons on your calculator. It's 91.34°, rounded to just 91°. Choice A

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john paid $99 for one algebra book and two geometry book. the cost of a geometry book is $3 less than a algebra book. substituti

tia_tia [17]

Answer:

A=34, G=31

Step-by-step explanation:

G=A-3

2G+A=99

plug in for g 2(A-3)+A=99

distribute 2 A-3+A=99

combine like terms 3A-3=99

solve for a 3A=102 A=34

plug in a solve for g G=34-3 G=31

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3 years ago

What best describes the number 5 ?write prime or composite or both prime and composite

Salsk061 [2.6K]

It is prime because nothing equals it other than 5x1

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4 years ago

Solve for R. P=R−C What is R equal to?

kykrilka [37]

Answer:

R = P+C

Step-by-step explanation:

P = R-C

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R = P+C

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3 years ago

A full grain silo

Kazeer [188]

Answer:

m is the slope.

b is the y-intercept.

the slope is the same as he constant rate.

let y = the number of feet of grain left in the silo.

let x = the number of seconds.

you get y = -3.5 * x + b.

when x = s seconds, the equation becomes y = -3.5 * s + b.

b is the y-intercept which is the value of y when x = 0.

when x = 0, no seconds have elapsed and the silo is therefore at whatever height it was before you started to empty it.

that would be the value of b.

if we assume that the height of the grain in the silo was 150 feet, then the formula would become

Step-by-step explanation:

y = -3.5 * x + 150

after s seconds, the formula would become y = -3.5 * s + 150.

if s was equal to 20, then the formula would become y = -3.5 * 20 + 150 which would then become y = -70 + 150 which would then become y = 80.

after 20 seconds, there would be 80 feet of grain left in the silo.

the graph of the equation would look like this.

from the graph, you can see that the height of the grain in the silo is 150 feet when you start and gets down to 80 feet after 20 seconds and that the silo will be empty somewhere between 42 and 43 seconds.

7 0

3 years ago

Suppose that y varies inversely with x. Write an equation for the inverse variation. y = 6 when x = 1/3

murzikaleks [220]

Y='x'xk
6=1/3xk
K=18
Y='x'x18
Y=18x

7 0

3 years ago

Read 2 more answers