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steposvetlana [31]
3 years ago
6

Will upvote brainiest answer and add friend

Mathematics
1 answer:
Mashcka [7]3 years ago
8 0

Answer:

68°

Step-by-step explanation:

ABD is a right angle and the measure of it is 90°

m<CBD + m<ABC = m<ABD

4x + 52° + 8x - 10 = 90° add like terms

12x + 42° = 90°

12x = 48°

x = 4

m<CBD is 4x + 52° replace x with 4

4×4 + 52 = 68°

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Answer:

-13/2

Step-by-step explanation:

-13/2 is the answer

4 0
2 years ago
Geometric proofs. I just don’t understand it and my teacher isn’t helping.
pshichka [43]
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2 years ago
Which of the following is equivalent to the expression below?
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2 years ago
Which statement is true about the given set of data? {(4, 0), (5, 0), (8, 0), (11, 0)}
Anni [7]

Answer:

a

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Step-by-step explanation:

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7 0
3 years ago
Use the distance formula d = rt to find the unknown value d = 405 mi t = 7.5 h
DochEvi [55]

Answer:

r = 54 miles per hour

Step-by-step explanation:

Since we have been given the values for two of the unknowns, we can substitute them into the equation to find the third.

d = 405

t = 7.5

d = rt

405 = r (7.5)

405=7.5r

Now to find r, we need to get it by itself on one side so we have r = ...

We can do this by dividing 7.5 from both sides of the equation as this will cancel out the 7.5, leaving us with the r value, and everything you do to one side of an equation must also be done to the other side.

405/7.5=7.5r/7.5

54=r

The unknown value 'r' = 54

Since 'r' stands for 'rate', the units given must be appropriate for speed. As the distance was given in miles, and the time in hours, the unit for 'r' must be miles/hour. Therefore r=54miles/hour.

Hope this helped!

4 0
2 years ago
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