We can use the cosine rule to find the third side:
c² = a² + b² -2abcos(C)
c = √(42² + 35² - 2(42)(35)cos(120)
c = 66.78
The answer is D.
Answer:
What percent of the school are girls? 55%
What percent of the school are boys? 45%
How many boys are there? 162
How many girls are there? 198
Step-by-step explanation:
The number of girls = 198
The percent of girls = 198/360 x 100% = 55%
The number of boys = 360-198 = 162.
The percent of boys = 162/360 x 100% = 45%.
Answer:
Step-by-step explanation:
i say a
Answer: 144 minutes
Step-by-step explanation:
Based on the information that has been given in the question, the minutes that the slower pipe alone can use in filling the tank can be denoted by y minutes.
Therefore, the faster pipe will fill it in 1/3 × x = x/3 minutes.
Therefore,
1/x + 3/x = 1/36
4/x = 1/36
x = 36 × 4
x = 144
The number of minutes taken by the slower pipe will be 144 minutes.
Well, I don't know.
Let's see . . .
To simplify any fraction, you divide both the numerator and denominator
by their greatest common factor. So we need to determine whether 49
and 98 have any common factors.
When you work it all out, it turns out that 49 is the greatest common factor
of 49 and 98, so you can divide top and bottom by 49. When you do that,
you have <em>1/2</em> .
