3 years ago

Which of the following equations, represents the line with a slope of -2/5 and a y-intercept of 2?

Mathematics

1 answer:

ValentinkaMS [17]3 years ago

7 0

Answer:

Step-by-step explanation:

Y intercept means x=0.

y=mx+c

m is the slope

y=-2/5x+c

Y intercept is 2

y=(-2/5)0+c =2

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3 years ago

Read 2 more answers

Sin 3A = cos (A – 70ᵒ), where A is an acute angle then A = ________________ ᵒ.

romanna [79]

Answer:

A = 40°

Step-by-step explanation:

$\sin 3A = \cos (A – 70ᵒ) \\ \\ \cos(90 \degree - 3A) = \cos (A – 70ᵒ) \\ \{\because \: \cos(90 \degree - \theta) = \sin \theta \} \\ \\ (90 \degree - 3A) = (A – 70ᵒ) \\ \\ 90 \degree + 70ᵒ = 3A + A \\ \\ 160 \degree = 4A \\ \\ A = \frac{160 \degree}{4} \\ \\ \huge \red{ \boxed{A = 40 \degree}}$