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3 years ago

Can someone explain how to do this

Mathematics

2 answers:

sdas [7]3 years ago

5 0

You begin by finding the measure of the angles knowing that all angles in a triangle equal 180. Then you use tan 57=7/(line AC). This value squared plus 7 squared will equal the length of the hypotenuse squared.

Cloud [144]3 years ago

4 0

I'm pretty sure its a^2+b^2=C^2

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Answer 1-10 <br> Need before 10:00 CN

forsale [732]

Answer:

1. 1 4/5

2. 1 1/30

3. 2 3/20

4. 1 1/5

5. 1 13/20

6. 1 13/30

7. 1 29/60

8. 1 3/20

9. 1 7/10

10. 1 9/20

Hope this helps :)

8 0

3 years ago

In the game of Keno, a player starts by selecting 20 numbers from the numbers 1 to 80. After the player makes his selections, 20

DiKsa [7]

The percentage of winning if 20 winning numbers are randomly selected from numbers 1 to 80 is 12.48%.

Given There are 80 numbers from which 20 numbers are selected randomly in a game of Keno by player and after selection of 20 winning numbers again 20 numbers are selected and player wins if the player has correctly selected 3,4,or 5 of the 20 winning numbers.

Probability is the chance of happening an event among all the events possible.

Probability of winning is calculated as under:

Probability= $C(20,3)C(60,17)/C(80,20)$

We have taken C(20,3) because player will win if 5 numbers are selected from 20 winning numbers.

We have taken C(60,17) because after selection of 20 numbers 60 numbers will left from 80 and after winning from 3 numbers 17 numbers left and from total 80, 20 numbers are taken.

=C(20,3)C(60,17)/C(80,20)

=(20!/3!17! * 60!/17!43!)/80!/20!60!

=1140*387221678682300/35353161422121743200

=12.48%

Hence the probability of winning is 12.48%.

Learn more about probability at brainly.com/question/24756209

#SPJ4

5 0

2 years ago

How do you do inequalities

Alexandra [31]

Answer:

Summary Many simple inequalities can be solved by adding, subtracting, multiplying or dividing both sides until you are left with the variable on its own. But these things will change direction of the inequality: Multiplying or dividing both sides by a negative number. Swapping left and right hand sides

Step-by-step explanation:

6 0

2 years ago

What is the value of x2+9x+20 when x could be -5, -3 or -6

ANTONII [103]

Answer:

Step-by-step explanation:

You should use a ^ to indicate an exponent. x^2 is the same as x².

x² + 9x + 20

Replace the x with (-5).

(-5)² + 9(-5) + 20 = 25-45+20 = 0

Then do the same with x = (-3):

(-3)² + 9(-3) + 20 = 9 - 27 + 20 = 2

You can do x = (-6)

3 0

3 years ago

Need help on 13 and 14

USPshnik [31]

13. Supplementary angles are two angles that add up to 180 degrees.

3x + x = 180

Combine like terms:
4x = 180

4x divided by 4 = x

180 divided by 4 = 45

x = 45

Equation:
3(45) + 45 = 180

135 + 45 = 180 (TRUE STATEMENT)

Angle A = 135 degrees
Angle B = 45 degrees

This is correct as 135 + 45 adds up to 180 (making it a supplementary angle) AND 135 is 3 times bigger than 45 so it fits the answer’s standard.

Ima do number 14 in the comments as I don’t want to take too long to show number 13.

3 0

2 years ago