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JulsSmile [24]
3 years ago
14

Help please, thank you! :)

Mathematics
2 answers:
gayaneshka [121]3 years ago
7 0

I think it would be 100°

kramer3 years ago
4 0

Answer:

angle CBD= 130

Step-by-step explanation:

line ABC is a straight line which makes 180 degrees, since angle ABD is 50 you subtract 180-50=130 degrees.

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Whoever gets this right gets brainlyess answer and it's worth 8 points :)
ExtremeBDS [4]
You were right because you work backwards. so start with 80 and multiply that by 2 to get 160. Then divide that by 10 to get 16
7 0
3 years ago
Solve for r. <br><br> √2/3r + 1 = 23
Keith_Richards [23]

Answer:

2nd option

Step-by-step explanation:

\frac{\sqrt{2} }{3} r + 1 = 23 ( subtract 1 from both sides )

\frac{\sqrt{2} }{3} r = 22 ( multiply both sides by 3 to clear the fraction )

\sqrt{2} r = 66 ( divide both sides by \sqrt{2} )

r = \frac{66}{\sqrt{2} } × \frac{\sqrt{2} }{\sqrt{2} } ( rationalising the denominator )

r = \frac{66\sqrt{2} }{2} = 33\sqrt{2}

7 0
2 years ago
Read 2 more answers
A boy throws a ball into the air. The equation h=−16t^2+23t+4 models the path of the ball, where h is the height (in feet) of th
lina2011 [118]

Answer:

0.72secs

Step-by-step explanation:

Given the height of the ball in air modeled by the equation:

h=−16t²+23t+4

Required

Total time it spent in the air

To get this we need to calculate its time at the maximum height

At the maximum height,

v = dh/dt = 0

-32t + 23 = 0

-32t = -23

t = 23/32

t = 0.72secs

<em>Hence the total time it spend in the air will be 0.72secs</em>

8 0
3 years ago
Suppose the scores on a trivia quiz are normally distributed with a mean of 80 and a standard deviation of 5.
Kitty [74]

I think it would be scores below 75

8 0
3 years ago
Which number line graph represents the compound inequality –6 ≤ x &lt; 2
Andrei [34K]

Answer:

the 4th option

Step-by-step explanation:

x is greater than -6 but less than 2

6 0
2 years ago
Read 2 more answers
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