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Feliz [49]
3 years ago
9

Find the value of x in 5x + 8 = - 7​

Mathematics
2 answers:
Lerok [7]3 years ago
6 0

Answer:

x=-3

Step-by-step explanation:

subtract 8 from both sides

5x+8-8=-7-8

simplify

5x=-15

divide both sides by 5

x=-3

hope this helped

Gnom [1K]3 years ago
5 0
X=-3 the value of x is -3
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Find the exact value of cos theta​, given that sin thetaequalsStartFraction 15 Over 17 EndFraction and theta is in quadrant II.
vova2212 [387]

Answer:

cos \theta = -\frac{8}{17}

Step-by-step explanation:

For this case we know that:

sin \theta = \frac{15}{17}

And we want to find the value for cos \theta, so then we can use the following basic identity:

cos^2 \theta + sin^2 \theta =1

And if we solve for cos \theta we got:

cos^2 \theta = 1- sin^2 \theta

cos \theta =\pm \sqrt{1-sin^2 \theta}

And if we replace the value given we got:

cos \theta =\pm \sqrt{1- (\frac{15}{17})^2}=\sqrt{\frac{64}{289}}=\frac{\sqrt{64}}{\sqrt{289}}=\frac{8}{17}

For our case we know that the angle is on the II quadrant, and on this quadrant we know that the sine is positive but the cosine is negative so then the correct answer for this case would be:

cos \theta = -\frac{8}{17}

5 0
3 years ago
What are two step equations
miskamm [114]
2 step equations are equations that require 2 steps to solve it.

For example, 2x + 5 = 3x + 6

To solve for x, we must isolate it.

First subtract 2x on both sides, which is ONE step.

2x + 5 = 3x + 6
-2x         -2x

5 = x + 6

The we must subtract 6 from both sides of the equation, which makes is the second step.

5 = x + 6
-6       -6

-1 = x 

-1 would be the answer and we only used 2 steps to solve it.
8 0
3 years ago
What is the interquartile rang of the following data set? 9,30,2,48,42,18,81,5,55,73,11
ycow [4]
30 is the real answer
6 0
2 years ago
PLEASE HELP ME FAST!!!! ( It's about y-intercept)
Hoochie [10]

Answer:

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Step-by-step explanation:

1. The equation of any line in slope-intercept form is y = mx + b, where y = y-coordinate, m = slope, x = x-coordinate, and b = y-intercept.

2. Given that the slope is 6, we plug that value in m, and given that the y-intercept is -7, we plug that value in b:

  • y = mx + b
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5 0
3 years ago
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Temka [501]

Answer:

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