MATHEMATICS MIDDLE SCHOOL

use mental math to find the value of 15/124 times 230/30 divided by 230/124

Answers

Answer 1

Answer: the answer is 8 times 8 divided by 2 equal 2

Answer with explanation:

Formula used here ,

$\text{Time}=\frac{\text{Distance}}{\text{Speed}}$

It is given that the distance between Meredith and her friends house =2 4 blocks

Then At Speed = 1 block per minute.

$\text{Time}=(24)/(1)$ = 24 minutes.

At Speed = 2 block per minute.

$\text{Time}=(24)/(2)$ = 12 minutes.

At Speed = 3 block per minute.

$\text{Time}=(24)/(3)$ = 8 minutes.

At Speed = 4 block per minute.

$\text{Time}=(24)/(4)$ = 6 minutes.

At Speed = 6 block per minute.

$\text{Time}=(24)/(6)$ = 4 minutes.

At Speed = 8 block per minute.

$\text{Time}=(24)/(8)$ = 3 minutes.

At Speed = 10 block per minute.

$\text{Time}=(24)/(10)$ = 2.4 minutes.

At Speed = 12 block per minute.

$\text{Time}=(24)/(12)$ = 2 minutes.

At Speed = 24 block per minute.

$\text{Time}=(24)/(24)$ = 1 minute.

This problem can be solved by using the formula for

linear motions. The formula relating velocity, distance and time is:

t = d / v

where t is time, d is distance and v is velocity

We are given that d = 24 blocks

When v = 1 block / minute

t = 24 blocks / (1 block / minute)

t = 24 minutes

When v = 2 block / minute

t = 24 blocks / (2 block / minute)

t = 12 minutes

Hence we can see that it takes half the time when she is

travelling at 2 blocks per minute.

Select the rational expression that is equivalent to the given expression below.
4/x-3

Answers

-12 i think since 4 times 3 is 12

It not multiplying the 4 and the 3

Tom and jasper have the same percentage of blue marbles in their bags of marbles. Tom had five blue marbles and 20 total marbles. jasper has 12 blue marbles. how many of jasper marbles are not blue?

Answers

First find the persentage of blue marbles
5/20 = 0.25
0.25 = 25%

Next find the persentage for the other marbles
100% - 25% = 75%

Now take 75% of Jasper's 12 marbles
12*0.75 = 9 marbles are not blue

Explain how you know which coins could be used to show o.77 of a dollar

Answers

I Hope This Helps :)

The coins you could use to show 0.77 of a dollar ( or known as 77 cents ) are nickels , dimes , pennies or even quarters .

Example 1 : You could use 7 dimes which is 70 cents , 1 nickel which is 5 cents , then add 2 pennies which will add up to 77 cents .

Example 2 : You could use 2 quarters which is 50 cents , 2 dimes which is 20 cents & 7 pennies .

Example 3 : For the really long way , you could just use 77 pennies which will also give you 77 cents .

Example 4 : You could use 1 quarter , 5 dimes , & 2 pennies .

( Note : you must ALWAYS remember the values of coins when doing mathematical problems that's dealing with money )

A Penny : Is Equal To 1 Cent . ( 100 Pennies Make Up A Whole Dollar , 50 Pennies Make Up 50 Cents etc . )

A Nickel : Is Equal To 5 Cents . ( 2 Nickels Makes Up A Dime Which Is 10 Cents , 10 Nickels Makes Up 50 Cents , 20 Nickels Will Make Up A Dollar . )

A Dime : Is Equal To 10 Cents . ( 5 Dimes Is 50 Cents , 10 Dimes Is A Dollar . )

A Quarter : Is Equal To 25 Cents . ( 2 Quarters Is 50 Cents , 4 Quarters Is A Dollar . )

One side of a triangle is 3 1/3 cm, another side is 2/3 cm shorter than the first side, and the third side is 1 2/3 cm longer than the first side. What is the perimeter of the triangle?Thanks so much