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yan [13]
3 years ago
15

if you have a test average of 92 and a standard deviation of 1.8, you generally do well on test. true or false

Mathematics
1 answer:
jeka57 [31]3 years ago
3 0
By most standards yes
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Find the values of x and y
zhuklara [117]

You can use a tangent:

tangent=\dfrac{opposite}{adjacent}

We have opposite = 17 and adjacent = x.

\tan30^o=\dfrac{\sqrt3}{3}

substitute:

\dfrac{17}{x}=\dfrac{\sqrt3}{3}       cross multiply

x\sqrt3=(3)(17)     multiply both sides by √3

x(\sqrt3)(\sqrt3)=51\sqrt3

3x=51\sqrt3      divide both sides by 3

x=17\sqrt3

Use the Pythagorean theorem:

y^2=(17\sqrt3)^2+17^2\\\\y^2=289(\sqrt3)^2+289\\\\y^2=289\cdot3+289\\\\y^2=867+289\\\\y^2=1156\to y=\sqrt{1156}\\\\y=34

-------------------------------------------------------------------------------------------------

Other method.

30^o-60^o-90^o triangle.

The sides are in the ratio 1:2:\sqrt3\to17:y:x

Therefore

17:(2\cdot17):(17\sqrt3)\to17:34:17\sqrt3\to x=34,\ y=17\sqrt3

 


4 0
3 years ago
P(A)=0.45, P(A∩B)=0.15 and P(B\A)=0.25 what is the value of P(A\B)
Fiesta28 [93]

Answer:

0.35? That is correct?

7 0
3 years ago
Select the ratio equivalent to 8:2<br>A. 24:10 <br>B. 4:2<br>C.4:1<br>D. 32:12​
Mama L [17]

Answer:

C)

Step-by-step explanation:

If you divide 8:2 by two you get 4:1 which is the equivilant ratio.

Hope this helps.

4 0
3 years ago
The first 32 whole numbers are evenly spaced around the circumference of a circle. Which number will be opposite of 26?
Ludmilka [50]

Answer:

"10"

Step-by-step explanation:

This is rather thinking "pictorially". Picture it.

You can match it with a round clock that has numbers 1 - 12 written on it.

So,

32 and 16 would be opposite of each other [top and bottom]. And, 1 - 15 would be on right side and 17 - 31 would be on left side.

Now,

Going counter-clockwise from 32, 26 would be the 6th number. Going counter-clockwise from 16, 10 would be the 6th number.

Hence, they would be opposite of each other.

10 would be opposite of 26

6 0
3 years ago
THIS IS WORTH 10 POINTS BECAUSE OF IMPROPER ANWSERS FOR POINTS
almond37 [142]

Answer:

b

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
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