MATHEMATICS HIGH SCHOOL

Find the unknown marked angles​
find the unknown marked angles​ - 1

Answers

Answer 1
Answer: 30° I think.........

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If there is an 80% chance of rain and a 30% chance of wind and rain, what is the probability that it is windy, given that it is rainy? Round your answer to the nearest percent.

Answers

We suppose the total chance is 100%. So the chance of wind and rain accounts for 30%. Then it is given rainy. So the total chance will change to 80% and the chance of wind and rain remains constant. Then you can get the answer should be 30%/80%=37.5%≈38%.

Answer:38

Step-by-step explanation:

Choose the number that is composite.


A. 2
B. 21
C. 31
D. 17

Answers

A composite number has more than two factors. (B) 21 is a composite number because the factors of 21 are 7 × 3.

Another wooden plank is leaning against an outside wall of a building. The bottom of the plank is 9 ft from the wall. The length of the plank is 41 ft. Find each of the following values, and show all your work. (a) Find the value of x. Round to the nearest tenth of a degree. (b) Find the height above the ground where the plank touches the wall. Round to the nearest foot.        sorry the link for the triangle isn't working

Answers

Given:
bottom of the plank or ground is 9 feet from the wall
length of the plant is 41 ft
height of the wall is unknown.

Let us use the Pythagorean theorem.

a² + b² = c²
a² + (9ft)² = (41ft)²
a² + 81 ft² = 1,681 ft²
a² = 1,681 ft² - 81 ft²
a² = 1,600 ft²
√a² = √1,600 ft²
a = 40 ft

The height of the wall is 40 ft.

John drives 257 miles and uses 9 gallons of gas. How many miles per gallon did he get?

Answers

This problem can solve by the rule of three:
275 miles---------------9 gallons
x---------------------------1 gallons.

x=(275 miles * 1 gallons) / 9 gallons=28.55555.... miles≈28.56 miles.

Answer: 28.56 miles.

If it is 3:00 pm here and Australia is 13 hours ahead of us. What time is it in Australia?

Answers

Okay so....
if it is 3 a.m. at your location, then it would be 1600 hours or 4 p.m. at the location in Australia 
if it is 3 p.m. at your location, then it would be 0400 hours or 4 a.m the next day at that location in Australia. 
- 
my best answer is that it would be at least 3:00am or 4:00am

Can someone please help me with this math question PLEASE HELP THIS IS URGENT

Answers

Answer:

(- 1, 4 )

Step-by-step explanation:

x = 1 is a vertical line passing through all points with an x- coordinate of 1

The point P(3, 4) is to units to the right of x = 1.

Hence the refection will be 2 units to the left of x = 1

P' = (1 - 2, 4 ) = (- 1, 4 )
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