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disa [49]
3 years ago
5

PLS HELP ASAP:Find all the missing elements:

Mathematics
1 answer:
adelina 88 [10]3 years ago
3 0

Answer:

b ≈ 9.5, c ≈ 14.7

Step-by-step explanation:

Using the Sine rule in Δ ABC, that is

\frac{a}{sinA} = \frac{b}{sinB} , substitute values

\frac{7}{sin23} = \frac{b}{sin32} ( cross- multiply )

b × sin23° = 7 × sin32° ( divide both sides by sin23° )

b = \frac{7sin32}{sin23} ≈ 9.5 ( to the nearest tenth )

Also

\frac{a}{sinA} = \frac{c}{sinC}

\frac{7}{sin23} = \frac{c}{sin125} ( cross- multiply )

c × sin23° = 7 × sin125° ( divide both sides by sin23° )

c = \frac{7sin125}{sin23} ≈ 14.7 ( to the nearest tenth )

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Step-by-step explanation:

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Logs are stacked in a pile. The top row has 15 logs and the bottom row has 24 logs. How many logs are there in the stack?
ziro4ka [17]
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You can also use the formula (where n is the number of rows)
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3 years ago
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If you add​ Natalie's age and​ Fred's age, the result is 39 If you add​ Fred's age to 3 times​ Natalie's age, the result is 69 W
vaieri [72.5K]

Answer:

Natalie is 15

Fred is 24

Step-by-step explanation:

You would first create equations to represent the problem. You would then solve for a variable (I chose to solve for y). I subtracted each equation from each other which helped me isolate y, which equaled 15. I then substituted y for 15 which allowed me to isolate x, which gave me 24.

(the equations)

x + y = 39

x + 3y = 69

(solving for y)

x + 3y = 69 - x + y = 39

x-x +3y -y = 69 - 39

2y = 30

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(solving for x)

x + 15 = 39

x +15 -15 = 39 -15

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3 years ago
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