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2 years ago

WHICH STATEMENT IS TRUE ABOUT THE PRODUCT OF 5/12 X 7

Mathematics

1 answer:

I am Lyosha [343]2 years ago

7 0

The product is 35/12.

Step-by-step explanation:

Multiplying the fraction with a whole number, we will get,

5/12 × 7

which means that we have to multiply the numerator 5 by 7 and then divide the product by 12.

= 5×7 / 12

= 35/12

So the product is 35/12.

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3 years ago

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3 years ago

Use the Law of Cosines to find the values of x and y. (PLEASE HELPPP!!!!)

vredina [299]

Answer:

$x = 49.8^\circ\\y = 54.6^\circ$

Step-by-step explanation:

Kindly refer to the image attached in the answer region for labeling of triangle.

AB = 16

BC = 19

AC = 15

$\angle ABC = x^\circ\\\angle ACB = y^\circ$

We have to find the angles x and y i.e. $\angle B \text{ and }\angle C$ .

Formula for cosine rule:

$cos B = \dfrac{a^{2}+c^{2}-b^{2}}{2ac}$

Where

a is the side opposite to $\angle A$ ,

b is the side opposite to $\angle B$ and

c is the side opposite to $\angle C$ .

$\Rightarrow cos x = \dfrac{19^{2}+16^{2}-15^{2}}{2 \times 19 \times 16}\\\Rightarrow cos x = \dfrac{392}{608} \\\Rightarrow x = 49.8^\circ$

Similarly, for finding the value of y:

$cos C = \dfrac{a^{2}+b^{2}-c^{2}}{2ab}\\\Rightarrow cos y = \dfrac{19^{2}+15^{2}-16^{2}}{2 \times 19 \times 15}\\\Rightarrow cos y = \dfrac{330}{570}\\\Rightarrow y = 54.6^\circ$

Hence, the values are:

$x = 49.8^\circ\\y = 54.6^\circ$

7 0

3 years ago

What is f(r) = 60 - 2/3 r when r =12?

7nadin3 [17]

F(r) = 60 - 2/3r r = 12
Substitute r for 12

f(12) = 60 - 2/3(12) 12 * 2/3 = 8

f(12) = 60 - 8

f(12) = 52

52 is your answer

5 0

3 years ago