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Sidana [21]
3 years ago
7

Evaluate −f(a) f(x)=−5x²+2x−1

Mathematics
1 answer:
andre [41]3 years ago
5 0
\bf f(x)=-5x^2+2x-1\implies f(a)=-5(a)^2+2(a)-1
\\\\\\
f(a)=-5a^2+2a-1
\\\\\\
-f(a)\implies -~[-5a^2+2a-1]\implies 5a^2-2a+1
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Find the measure of the indicated arcs or central angles in OA. DG is a diameter.
lara31 [8.8K]

Answer:

Arc DE = 90°

m<GAB = 82°

Arc DC = 49°

Step-by-step explanation:

Given:

m<EAF = 74°

m<EAD = right angle = 90°

Arc BG = 82°

Required:

Arc DE,

<GAB, and

Arc DC

Solution:

Recall that the central angle measure = the intercepted arc measure.

Therefore:

✔️Arc DE = m<EAD

Arc DE = 90° (Substitution)

✔️m<GAB = arc BG

m<GAB = 82° (Substitution)

✔️Arc DC = m<CAD

Find m<CAD

m<CAD = ½(180 - m<GAB)

m<CAD = ½(180 - 82)

m<CAD = 49°

Arc DC = m<CAD

Arc DC = 49°

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