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3 years ago

(please help me out D: ) (I screenshot the question and answer)

Mathematics

1 answer:

stira [4]3 years ago

3 0

To find the perimeter, you need the lengths of all 3 legs,
and then you add them up.

Can you find the lengths of the other 2 sides of that triangle ?

Here are a couple of factoids I learned in 1954 and I never forgot:

In a 30°- 60°- 90° right triangle . . .

-- the side opposite the 30° angle (the shorter leg)
is 1/2 the length of the hypotenuse,
and
-- the side opposite the 60° angle (the longer leg)
is (1/2 the length of the hypotenuse) times (√3).

If you have a 30°- 60°- 90° triangle and you know the length
of any one side, then you can find the lengths of the other
two sides with these amazing factoids.

You might be interested in

Help me please

torisob [31]

Answer:

26 ft

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Anja stands by the side of the road counting the wheels on the vehicles that go past her if she counts 250 wheels tie many cars

Juliette [100K]

Answer:

50 cars and 25 bikes

Step-by-step explanation:

Given

Total wheels = 250

Required:

Number of cars and bikes

Let C represent Cars and B represents Bike

A car has 4 wheels and a bike has 2 wheels;

So,

$4C + 2B = 250$

Divide through by 2

$\frac{4C + 2B}{2} = \frac{250}{2}$

$2C + B = 125$ ---- Equation 1

The ratio of wheels of cars to wheels of bike is 1:2

Meaning that

1C = 2B

So, C = 2B

Substitute 2B for C in equation 1

$2(2B) + B = 125$

$4B + B = 125$

$5B = 125$

Divide both sides by 5

$\frac{5B}{5} = \frac{125}{5}$

$B = \frac{125}{5}$

$B = 25$

Recall that C = 2B

So,

$C = 2 * 25$

$C = 50$

Hence, Anna has seen 50 cars and 25 bikes

6 0

3 years ago

1. One week a student exercised 3 hours at school and 1/4 hour at home. If 1/4 of the student's total exercise came from playing

Gelneren [198K]

Answer:

1- The student spent 48 minutes and 45 seconds playing basketball.

2- The student spent 33 minutes and 45 seconds playing soccer.

Step-by-step explanation:

1- If during a week the student exercised for 3 hours at school, and for 1/4 hour at home, it could be said that the student exercised for a total of 195 minutes (60 x 3 + 60/4) . Now, if I exercise 1/4 of that time playing basketball, the student spent 48 minutes and 45 seconds playing that sport (195/4).

2- If during a week the student exercised for 2 hours at school, and for 1/4 hour at home, it could be said that the student exercised for a total of 135 minutes (60 x 2 + 60/4) . Now, if I exercise 1/4 of that time playing basketball, the student spent 33 minutes and 45 seconds playing soccer (135/4).

4 0

3 years ago

Read 2 more answers

Manny runs 15 3/4miles each week. Zander runs

photoshop1234 [79]

Answer: Zander Runs, 13.125 miles. You take the mixed number and change it into an improper fraction. So you get 63/4 then multiply that by 5/6 and get 13.125 miles there is your answer. I hope this helps you

Step-by-step explanation:

8 0

3 years ago

White shapes and black shapes are used in a game. Some of the shapes are circles. All the other sahpes are squares.

seropon [69]

Answer:

9/32

Step-by-step explanation:

BC = black circle

BS = black square

WC = white circle

WS = white square

Given:

(WC + WS) / (BC + BS) = 5 / 11

WC / WS = 3 / 7

BC / BS = 3 / 8

Find: (BC + WC) / (BC + BS + WC + WS)

Solve for WC and BC in the last two equations, then substitute into the first:

WC = 3/7 WS

BC = 3/8 BS

WC + WS = 5/11 (BC + BS)

3/7 WS + WS = 5/11 (3/8 BS + BS)

10/7 WS = 5/8 BS

WS = 7/16 BS

Therefore:

WC = 3/7 WS

WC = 3/16 BS

Substitute:

(BC + WC) / (BC + BS + WC + WS)

(3/8 BS + 3/16 BS) / (3/8 BS + BS + 3/16 BS + 7/16 BS)

(9/16 BS) / (2 BS)

9/32

5 0

3 years ago