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Lorico [155]
3 years ago
10

HELP! 15 pts!

Mathematics
1 answer:
Aleks04 [339]3 years ago
3 0

Answer: B

Step-by-step explanation:

To solve the system of equations, use substitution.

x+y =24

Subtract x on both sides

y=-x+24

We can now substitute -x+24 in for y in the second equation.

3x+5y=100

3x+5(-x+24)=100

Distribute the 5

3x-5x+120=100

Subtract the 120 on both sides

-2x=-20

Divide by 2 on both sides

x=10

Substitute 10 in for x in the first equation.

x+y=24

10+y=24

Subtract 10 inches on both sides

y=14

So there are 10 3point questions and 14 5 point questions, so choice B

Hope this helped!

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Step-by-step explanation:

If X is the centroid that means that EC is a median along with the other lines that intersect inside the triangle. Medians drawn from a triangle have a special rule; this rule is that all medians have a 2:1 ratio between the different sections of one median. For example, EC is one median with the two sections XC and EX. Therefore XC and EX have a 2:1, with the 2 representing the longer section closest to the vertex. This means that XC is double EX, so to find XC simply double EX measurement, which is 8. So XC must equal 16.

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