2 years ago

Intro to Systems of Equations

Mathematics

1 answer:

Dafna11 [192]2 years ago

3 0

Answer:

huh

Step-by-step explanation:

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irinina [24]

Answer:

78.5 in ^2

Step-by-step explanation:

radius = 5

A = 25π

= 78.5

4 0

3 years ago

An extremely large sink hole has opened up in a field just outside of the city limits. It is difficult to measure across the sin

abruzzese [7]

Triangle ABC and triangle DCE are congruent, so line DE = line AB

Use the cosine rule to find angle ACB
$52.2^{2}= 50^{2}+ 70^{2}-(2*50*70*cos(ACB))$
$2724.84=7400-(7000cos(ACB))$
$2724.84-7400=-7000cos(ACB)$
$-4675.16=-7000cos(ACB)$
$\frac{4675.16}{7000}=cos(ACB)$
$Angle ACB= cos^{-1} ( \frac{4675.16}{7000})$
Angle ACB = 48.1°