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Brilliant_brown [7]
2 years ago
15

A

Mathematics
1 answer:
REY [17]2 years ago
7 0

Answer: C

Step-by-step explanation:

Angles in a quadrilateral add to 360 degrees, so:

90^{\circ}+90^{\circ}+99^{\circ}+m\angle C=360^{\circ}\\\\m\angle C=81^{\circ}

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Read the word problem below.
salantis [7]

Answer:

1 3/5 miles/hr

Step-by-step explanation:

Let C be the speed of the current

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We know that Distance, D, is = Speed x Time

-----

Chan's speed going upstream is (8 - C)mph.

That gives us:

D = (8-C)(3 hr)

Chan's speed going downstream is (8+C)mph

So we have:

D = (8+C)(2 hr)

We know that the d is the same for these two equations, so:

(8-C)(3 hr)  = (8+C)(2 hr)

24 - 3C = 16 + 2C

5C = 8

C = (8/5) or 1 3/5 mph

5 0
2 years ago
Read 2 more answers
What are the solutions to this system of equations?
saveliy_v [14]

Answer:

A

Step-by-step explanation:

The solution is at the points of intersections of the graphs

The graphs intersect at (- 3, 0 ) and (2, 5 )  , then

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4 0
2 years ago
3 x 47 as 3 x 7 + 3 x 7 what property
bonufazy [111]

Answer:

I think it’s the associative property

8 0
2 years ago
A translation occurred that moved 4 units left and 3 units up. If Point A was at ( -3, -2 ), what are the coordinates of A'?
snow_lady [41]

Answer:

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4 0
3 years ago
Rewrite it in factored form: x4 - y2 x2
SCORPION-xisa [38]

Answer:

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Step-by-step explanation:

I'm going to write it so I can see it better:

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3 0
3 years ago
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