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3 years ago

A class has 6 boys and 15 girls. What is the ratio of boys to girls? Example 2

Mathematics

2 answers:

Travka [436]3 years ago

7 0

Answer:

Simplified: 6/15 = 2/5

Step-by-step explanation:

Nataly_w [17]3 years ago

5 0

Answer:

6:15 (6 to 15)))))))))))))))))))))

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Solve the triangle A = 2 B = 9 C =8

VARVARA [1.3K]

Answer:

$\begin{gathered} A=\text{ 12}\degree \\ B=\text{ 114}\degree \\ C=54\degree \end{gathered}$

Step-by-step explanation:

To calculate the angles of the given triangle, we can use the law of cosines:

$\begin{gathered} \cos (C)=\frac{a^2+b^2-c^2}{2ab} \\ \cos (A)=\frac{b^2+c^2-a^2}{2bc} \\ \cos (B)=\frac{c^2+a^2-b^2}{2ca} \end{gathered}$

Then, given the sides a=2, b=9, and c=8.

$\begin{gathered} \cos (A)=\frac{9^2+8^2-2^2}{2\cdot9\cdot8} \\ \cos (A)=\frac{141}{144} \\ A=\cos ^{-1}(\frac{141}{144}) \\ A=11.7 \\ \text{ Rounding to the nearest degree:} \\ A=12º \end{gathered}$

For B:

$\begin{gathered} \cos (B)=\frac{8^2+2^2-9^2}{2\cdot8\cdot2} \\ \cos (B)=\frac{13}{32} \\ B=\cos ^{-1}(\frac{13}{32}) \\ B=113.9\degree \\ \text{Rounding:} \\ B=114\degree \end{gathered}$ $\begin{gathered} \cos (C)=\frac{2^2+9^2-8^2}{2\cdot2\cdot9} \\ \cos (C)=\frac{21}{36} \\ C=\cos ^{-1}(\frac{21}{36}) \\ C=54.3 \\ \text{Rounding:} \\ C=\text{ 54}\degree \end{gathered}$

3 0

1 year ago

Ten subtracted from the quotient of a number and 7 is less than -6

Tresset [83]

Answer: (x ÷ 7) - 10 < -6

Step-by-step explanation:

4 0

3 years ago

Decide if the following biconditional statement

garik1379 [7]

true because if you add up 4 90°you get 360

7 0

3 years ago

Read 2 more answers

Jeff adds 5 Xbox games to his collection but then has to give half of his collection away. He now has 8 Xbox games. How many Xbo

ratelena [41]

Answer:

13 i think

Step-by-step explanation:

7 0

3 years ago

I need help that is simple enough explnation

velikii [3]

Answer:

7 in both boxes

Step-by-step explanation:

In the picture, it shows

4 (x - 3) = 20

and then it shows

4 (x) - 4 (3) = 20

so practically you separate the x and 3 and put them in parentheses and then put a 4 next to both of them.

It should be the same as your question.

7 x (8 - 3)

and then separate 8 and 3 and put a 7 next to both of them.

( 7 x 8) - ( 7 x 3)

Hope it helps and have a great day! =D

~sunshine~

3 0

2 years ago

A class has 6 boys and 15 girls. What is the ratio of boys to girls? Example 2​

A class has 6 boys and 15 girls. What is the ratio of boys to girls? Example 2