Boys : Girls : Total
5 : 7 : 5 + 7
5 . ; 7 . : 12
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Find 1 part :
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12 parts = 36
1 part = 36 ÷ 12
1 part = 3
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Find number of boys (5 parts)
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1 part = 3
5 parts = 3 x 5
5 parts = 15
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Answer: There are 15 boys.
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Answer:
The average speed of a sprinter would be 8m/s (meters per second).
Step-by-step explanation:
200/25 = 8
Answer:
4u= - 4i - 24j
u +w = -9i - 3j
Step-by-step explanation:
The question is on operation of vectors
Given u= -i -6j and w= -8i+3j
Then 4u = 4{ -i-6j}
4u= - 4i - 24j
u+w= -i -6j + -8i+3j......................collect like terms
= -i -8i + -6j +3j
= -9i + -3j
= -9i - 3j
<span>A. 8,648,640
B. 13
C. 665,280
D. 4,324,320
</span>Assume you don't watch movies twice.
If you have 13 movies to pick from, then you have 13 choices for the first movie. Then, only 12 choices are left. Do this until only 6 are left (13-7=6)
This equates to

Therefore, the answer is A, 8,648,640 different ways.
Hope this helps!