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Paha777 [63]
3 years ago
7

[Find all the missing side and angles of this triangle]

Mathematics
1 answer:
nydimaria [60]3 years ago
4 0

Step-by-step explanation:

We have AB = 7, Angle ABC = 70°

and Angle ACB = 90°.

Angle BAC = 180° - 70° - 90° = 20°

(Sum of angles in a triangle = 180°)

Using Trignometry,

AC = 7sin70° = 6.58.

BC = 7cos70° = 2.39.

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Solve.<br> 9x + 6y = -3<br> y = -8
klio [65]

Answer:

5

Step-by-step explanation:

9x+6y=-3

9x+6(-8)=-3

9x-48=-3

9x=45

x=5

6 0
2 years ago
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I need help ASAP. Will give Brainliest.
Volgvan

Answer:

4,5

Step-by-step explanation:

Your welcome! :)

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8 0
3 years ago
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13/39 in simplest form
kifflom [539]

Answer:

1/3

Step-by-step explanation:

Find a number that goes into both the numerator and denominator, and divide, then you get 1/3

4 0
3 years ago
How long is the base of a parallelogram if it has an area of 120 square inches and a height of 10 square inches?
nataly862011 [7]

Answer:

Your answer should be 1,200 because 120 x 10 is 1,200

5 0
3 years ago
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From an industrial area 70 companies were selected at random and 45 of them were panning for expansion next year. Find 95% confi
Lana71 [14]

Answer:

Confidence limit = [52.8%, 75.2%]

Step-by-step explanation:

P=\frac{45}{70}= 0.64

(1-P)=1-0.64=0.36

n= 70

P ± z \sqrt{\frac{P(1-P)}{n} }

where the value z will be taken from the z-table for 95% confidence interval

1-0.95= 0.05/2= 0.025

0.95+0.025= 0.0975

From the z-table the value of z corresponding to 0.0975 is 1.96

0.64 ± 1.96 \sqrt{\frac{0.64*0.36}{70} }

0.64 ± 1.96 (0.057)

0.64 ± 0.112

64%% ± 11.2%

so the confidence interval is

64+11.2=75.2%

64-11.2=52.8%

[52.8, 75.2]

8 0
3 years ago
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