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USPshnik [31]
3 years ago
11

I honestly need help on this...I tried to work it out but I just don’t know where to start...

Mathematics
1 answer:
Ilia_Sergeevich [38]3 years ago
4 0

Answer:

Step-by-step explanation:

1) The sum of angles on a straight line is 180 degrees. Therefore

75 + a + 70 = 180

145 + a = 180

a = 180 - 145 = 35 degrees

2) Sum of the angles in a triangle is 180 degrees. Therefore,

a + b + 95 = 180

35 + b + 95 = 180

130 + b = 180

b = 180 - 130 = 50 degrees

3) c + 95 = 180 degrees (sum of angles on a straight line).

c = 180 - 95 = 85 degrees

4) 70 + c + d = 180 degrees

70 + 85 + d = 180

155 + d = 180

d = 180 - 155 = 25 degrees

5) e = 75 degrees

6) f + e + 75 = 180 degrees

f + 75 + 75 = 180

f + 150 = 180

f = 180 - 150 = 30 degrees

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andrezito [222]
-c4^{x}
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=-3\frac{-3}{ 4^{2} }
=\frac{-3}{16}
3 0
3 years ago
Help please! ill mark brainliest!
Natasha_Volkova [10]

Answer:

0.225989

Step-by-step explanation:

3x+9+x-11=180

4x-3=180

4x=180-3

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0.225989

7 0
3 years ago
Read 2 more answers
The scores on an entrance exam to a university are known to have an approximately normal distribution with mean 65% and standard
emmasim [6.3K]

Answer:

The correct answer is - C. 24.1%

Step-by-step explanation:

Given:

mean μ = 65%

standard deviation δ = 7.1 %

solution:

Prob( X>70) = 1 - Prob(x<70)  

= P (x-μ/δ ≥ 70 -65/7.1)

= 1 - Prob( (70-65)/7.1)

= 1 - Prob ( z < 0.7042553)

= 0.24065

the percentage of students scoring 70 or more in the exam

= 24.065*100

= 24.1%

4 0
2 years ago
A cube has a surface area of 294sq. In. What is the length of the sides<br> 49<br> 7<br> 6.6
arlik [135]

Answer:

The length of the sides is <u>7 In</u>.

Step-by-step explanation:

Given:

A cube has a surface area of 294 sq. In.

Now, to find the sides.

Let the side be a

Putting the formula of area to get the length of side:

Area = 6(side)^2

294=6a^2

<em>Dividing both sides by 6 we get:</em>

49=a^2

<em>Using square root on both sides we get:</em>

7=a

Side = 7 In.

Therefore, the length of the sides is <u>7 In</u>.

5 0
3 years ago
Plzz do correctly worth a lot of points
Anastaziya [24]

Answer:

-9 Would be the answer I would believe.

Step-by-step explanation:

-9 Would be the answer I would believe.

8 0
3 years ago
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