MATHEMATICS HIGH SCHOOL

If U=pi(r+h),find r when U=16 1/2 and h=2
solve this question by taking the value of pi 22/7

Answers

Answer 1
Answer: U=π(r+h)
r+h=U/π
r=U/π  - h

Data: 
U=16  1/2=16  +  1/2=(16*2+1)/2=33/2
h=2
π=22/7

Then: 
r=U/π  - h
r=(33/2)/(22/7)   -   2
r=(33*7)/(2*22)   -   2
r=231 /44   -   2
r=(231-2*44)/ 44
r=(231-88)/44
r=143/44   =   (3*44  + 11)/44=3  11/44

Answer: r=143/44      or    3  11/44
Answer 2
Answer: U =  π* (r + h )   [ : π

(U)/( \pi ) = r + h \n \n r = (U)/( \pi ) - h \n \n r = (16,5)/( \pi ) - 2 \n \n r = (165)/(10) : (22)/(7) - 2 \n \n r = (33)/(2) * (7)/(22) - 2 \n \n r = (3)/(2) * (7)/(2) - 2 \n \n r = (21)/(4) - 2 = 5,25 - 2 = 3.25 Answer r = 3,25

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What value or values of x satisfy 2|x + 5.3| = 4.2? x can only equal –3.2. x can only equal 7.4. x can equal –3.2 or –7.4. x can equal –3.2 or 7.4.

Answers

2 | x + 5.3 | = 4.2
| x + 5.3 | = 4.2 / 2
| x + 5.3 | = 2.1

x + 5.3 = 2.1              x + 5.3 = - 2.1
x = 2.1 - 5.3               x = -2.1 - 5.3
x = - 3.2                     x = - 7.4

solution is : x = -3.2 or x = -7.4

Answer:

What value or values of x satisfy 2|x + 5.3| = 4.2?

x can only equal –3.2.

x can only equal 7.4.

x can equal –3.2 or –7.4.

x can equal –3.2 or 7.4.

Step-by-step explanation:

x can equal –3.2 or –7.4. Is the correct answer.

At the last football game, 4 out of every 9 students wore school colors. Based on this information, if 450 students attend the next football game, how many students will wear school colors?

Answers

450 / 9 = 50

50 x 4 = 200

200 students will wear school colours
200 students will wear school colors

ΔABC will undergo two transformations to give ΔA′B′C′. Which pair of transformations will give a different image of ΔABC if the order of the transformations is reversed?

Answers

a rotation 90° counterclockwise about the origin followed by a reflection across the y-axis

One more question, Will pick brainliest + extra points!! Find x!!

Answers

Here, as the sides are equal, middle line would be exact half then the longer (bottom) side of the triangle. 
48 = 2(3x)
6x = 48
x = 48/6
x = 8

In short, Your Answer would be Option D

Hope this helps!
Since the triangle ADC is an enlargement of triangle AEB, 48 divided by the enlargement factor will give you 3x.
The enlargement factor is:
= 60/30
= 2

Therefore:

3x = 48/2

3x = 24

3x/3 = 24/3

x = 8

What is the area of the triangle?

​

Answers

Answer:

4

Step-by-step explanation:

The area of a triangle is

A=1/2 bh

Where b is the base and h is  the height

A = 1/2 (4)(2)

A = 4

Ac=2(5a+1)
Bd=2(a+1)

Answers

2(5a+1)=2(a+1)10a+5=2a+2(10a-2a)+5=(2a-2a)+28a+5=28a+(5-5)=(2-5)8a=-3a=-3/8
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