21x because when a number (7) is right beside a number in parentheses it means that the number in the parentheses is being multiplied by the number next to the parentheses and then at the end when you get the answer you just put the x beside the answer.
Answer:
only 1
Step-by-step explanation: I just did the test and i got an A+!!
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Given:
In triangle ABC, Q is the centroid and FQ=9.
To find:
The length of FC and QC.
Solution:
We know that, centroid is the intersection point of medians of a triangle and medians divide teach other in 2:1. So, centroid divided each median in 2:1.
CF is a median and Q is the centroid. So,

Let the length of QC and FQ are 2x and x respectively.
We have, FQ=9.

Now,



And,



Therefore, the length of FC is 27 units and length of QC is 18 units.
Trigonometry
Sines, Cosines and tangents