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Blababa [14]
3 years ago
10

Which choice is the equation of a line that passes through the point (–2, 8) and is perpendicular to the line represented by thi

s equation?
5x − 2y = −10

A. 2x− 5y = 26
B. 5x + 2y = 10
C. 2x + 5y = 36
D. −2x + 5y = −13
Mathematics
1 answer:
Nookie1986 [14]3 years ago
5 0
The answer is D) -2x+5y=-13
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8 0
3 years ago
5cosx -2sin(x/2) +7=0<br>Help me to find x step by step<br>pls​
miskamm [114]

Answer:

x = 180

Step-by-step explanation:

First, you need to know

1. Double-angle formula:

cos(2x) = cos^{2}x - sin^{2}x

2. Pythagorean identity:

cos^{2}x + sin^{2}x = 1

Back to your problem, replacing the variable by the above:

5cosx-sin\frac{x}{2}+7 = 0

5(cos^{2}\frac{x}{2}-sin^{2}\frac{x}{2}) - 2sin\frac{x}{2} + 7 = 0 By Double-angle formula

5(1 - 2sin^{2}\frac{x}{2}) - 2sin\frac{x}{2} + 7 = 0 By Pythagorean identity

Given y = \frac{x}{2}

5(1-2sin^{2}y) - 2siny + 7 = 0

10sin^{2}y+2siny-12=0

5sin^{2}y+siny-6=0

(5siny + 6)(siny - 1)=0, we know -1 < sinx < 1, for every x ∈ R

siny = 1, y =90

y = \frac{x}{2}

x = 180

8 0
3 years ago
I need help with this!?!
AlekseyPX
Some of the important "given" information is outside of the photo.
We need to know that the two triangles are similar.
And we need to know that the WHAT ? of angle M is 9/40.
7 0
3 years ago
What is the partial product of 4.6 x 3.5
PIT_PIT [208]
The partial product of 4.6×3.5 is 16.1
7 0
3 years ago
Read 2 more answers
Use the quadratic formula to find the solutions for<br> y = -x2 - 5x + 12
sattari [20]
Y=-2x-5x+12
Add the variables
Y=-7x+12
There^
7 0
3 years ago
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