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Ann [662]
4 years ago
15

What is 7(5)-4x=51? Please

Mathematics
2 answers:
DaniilM [7]4 years ago
4 0
-4 = x 
hope i helped ;)
podryga [215]4 years ago
3 0
7(5)-4x=51
7 times 5 is 35, so:
35-4x=51
add 4x to both sides:
35=4x+51
subtract 51 from both sides to get:
-16=4x
divide by 4 on both sides to get
-4=x
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Answer:

Givens

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<h3>(A)</h3>

Remember that the arc subtended by a central angle is equal to it. That means

m(BC)=m\angle BAC = 63\°

<h3>(B)</h3>

Now, by sum of arcs, we know

m(EBC)=m(EB)+m(BC)=96\° +63\°=159\°

<h3>(C)</h3>

By definition, the total arc of a circle is 360°, so

m(EFC)=360\°-m(EBC)=360\° - 159\°=201\°

<h3>(D)</h3>

We know that the external angle formed by a secant and a tanget is one half of the difference between the intercepted arcs, so

\angle D=\frac{1}{2}(m(EFC)-m(BC))=\frac{1}{2} (201\° - 63\°)=\frac{1}{2} (138\°)=69\°

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AlladinOne [14]

Answer:

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