MATHEMATICS MIDDLE SCHOOL

A sphere has a radius of 31 millimeters. Find it's volume to the nearest tenth please. (Use 3.14 for pi)

Answers

Answer 1

Answer:

Answer:

V ≈ 124,725 mm^3

Step-by-step explanation:

Let's use the formula for volume of a sphere:

$v = (4)/(3)\pi {r}^(3)$

$v = (4)/(3) (3.14) {31}^(3)$

$v = (4)/(3)(3.14)29791$

$v = (4)/(3) 93543.74$

$v = (4)/(3) * (93543.74)/(1) = (374174.96)/(3)$

$v = 374174.96 / 3$

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mrs Singh bought 9 folders 9 notebooks. The cost of each folder is $2.50 and the cost of each notebook is $4 write two equivalent expressions then find the answer

Answers

He bought 3 folders and 2 notebooks

Let the cost of folder books be x
Let the cost of notebooks be y

We are told that mrs Singh bought 9 folders and 9 notebooks,

If the cost of each folder is $2.50 and the cost of each notebook is $4, then;

2.5x = 9 and 4y = 9

Get the value of x:

2.5x = 9

x = 9/2.5

x = 3.6

Get the value of y;

4y = 9

y = 9/4

y = 2.25

Hence he bought 3 folders and 2 notebooks

Learn more on eqautions here: brainly.com/question/2972832

Answer:

$58.50

Step-by-step explanation:

First, you write the 2 expressions.

9(2.50+4) = 9(2.50)+4; $58.50

2.50 + 4 = $6.50

$6.50*9 = $58.50

Hope this helps.

Find the surface area

Answers

Surface Area formula of a cylinder:
S.A = 2 × Area of base + Perimeter of base × Height of prism
= 2 $\pi$ r² + 2 $\pi$ rh
= 2 $\pi$ (5)² + 2 $\pi$ (5)(18)
= 50 $\pi$ + 180 $\pi$
= 230 $\pi$ in² ( in terms of $\pi$ )
= 722.566 in²
= 722.7 in² ( to the nearest tenth )

PLEASE HELP I GIVE THANKS

Answers

what you want to do is use pthygorean theorem ( think i spelled that right) A square plus B square = c Square. use that for the rectangle.
you should get the answer if you do that. make sure you multiply 8 times 8 and 5 times 5. then you add what you get. i think thats how to do it. hope it helps i am almost 100% sure

10) The triangle is an equilateral triangle so all the side are equal ,8cm times 3 ?

There wear 10000 bugs in a mountain in the train there are 15 bug how many bugs in all

Answers

So if there's 10,000 bugs in a mountain and 15 bugs in the train, then 10,000 + 15 = 10,015 because in all means to add.

What is the solution of the linear equation -12+3b - 1 = -5 - b

Answers

Answer:

The solution of the given linear equation is 2.

Step-by-step explanation:

$-12+3b - 1 = -5 - b$

Step 1 :Take all the like terms on same side

$-12+5 - 1 = - b- 3b$

Step 2 :

$-8=-4b$

Step 3 :

$b=(-8)/(-4)=2$

The solution of the given linear equation is 2.

$- 12 + 3b - 1 = - 5 - b \n \n - 13 + 3b = - 5 - b \n \n - 8 = - 4b \n \n b = 2$

First, add both sides by 5 and then subtract both sides by 3b

38" points please help1.-the top students in a distance throwing competition are shown in the table. How many yards did the winner of the competition throw the ball?

STUDENTS...................................DISTANCE
-Ashley..................................................162
-Craig.....................................................156
-Fernando.............................................175
-Robert...................................................166

(A) 58 1/3 yards
(B) 52 yards
(C) 468 yards
(D) 525 yards

2.-which property is represented by the equation below?

2/3 * 3/2 = 1

(A) commutative property of multiplication
(B) distributive property
(C) multiplicative identify property
(D) multiplicative inverse property

3.-in a machine ,a large gear completes a revolution every minute while a small gear completes a revolution every 24 seconds. If the gears are currently aligned, how much time will pass before they are aligned again?

(A) 1 minute
(B) 2 minutes
(C) 24 seconds
(D) 12 seconds

4.-use the ratio tables given to solve each problem.
Tommy can ride his bicycle 4.5 miles in 15 minutes. How many miles can he ride in 75 minutes?

Number of miles.......4.5 __ __ __ ?
Time (min)................... 15 __ __ __ 75

(A) 13.5
(B) 9
(C) 27
(D) 22.5

5.- Alex runs on the track at the school each weekday morning. If he runs 5.9 miles each day, about how much does he run every month?

(A) 108 miles
(B) 30 miles
(C) 42 miles
(D) 120 miles

Answers

1. The question is incomplete

2. Answer=D

3. Answer=B

LCM of 24 and 60=120

120seconds=2minutes

4. Answer=D

4.5 miles x miles
_________= _________
15 mins 75 minutes

cross multiply
15x=337.5
divide both sides by 15
x=22.5

5. Honestly, the number of weekdays per month varies...

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