MATHEMATICS MIDDLE SCHOOL

I’m not sure what to do..

Answers

Answer 1

Answer:

Answer:

x=291/76

Step-by-step explanation:

Convert:

1/2x(6x+ 1/2)=-0.8x+16-1.2

Remove parenthesis and move terms:

3x+1/4=-0.8x+14.8

Collect the like terms and convert:

3x+0.8x=14.8-1/4

Subtract the fractions:

3.8x=74/5-1/4

Divide both sides by 3.8:

3.8x=291/20

x=291/76

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You have four $1 bills, two $5 bills, five $10 bills, and five $20 bills in your wallet. You select a bill at random. Without replacing the bill, you choose a second bill. Find P($1, then $10).

Answers

The answer is 1/12. Because 4/16 x 5/15.

How do you write 3/5 as a percentage?

Answers

60% Thats all just writing so i can post

To find out, you need to turn the denominator to 100, so multiply the top and bottom of 3/5 by 20.

60/100

Therefore 3/5 as a percentage is 60%

There are 7 people at a party. If each person shakes the hand of everyone exactly once, how many handshakes will take place

Answers

Call the number of people $n$ .

Looking at the first person, they can shake hands with $n-1$ other people (since they can't shake hands with themselves.)

For the second person, they can shake hands with $n-2$ other people. (They can't shake hands with themselves and they already shook with Person 1, on Person 1's turn.

If we carry on this way we see that the total number of shakes is given by:
$(n-1)+(n-2)+...+2+1$ which simplifies to: $(n(n-1))/(2)$ .

For $n=7$ we then have:
$S=(7(7-1))/(2)=(7(6))/(2)=(42)/(2)=21$
OR
$S=(7-1)+(7-2)+(7-3)+(7-4)+(7-5)+(7-6)=6+5+4+3+3+2+1=21$

There will be 42 handshakes

a machine uses 2.5 liters of fuel each hour it runs,its fuel tank was filled with 10 L but 1.5 L have already been used how

many more hours will the machine run

Answers

The number of hours machine runs with 8.5 L fuel is 3.4 hours.

Given that, a machine uses 2.5 liters of fuel each hour it runs, its fuel tank was filled with 10 L but 1.5 L have already been used.

What is the unitary method?

The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.

Now, 10 - 1.5 = 8.5 L

So, the number of hours = 8.5/2.5

= 3.4 hours

Therefore, the number of hours machine runs with 8.5 L fuel is 3.4 hours.

To learn more about the unitary method visit:

brainly.com/question/22056199.

#SPJ2

10-1.5=8.5
8.5/2.5= 3.4 hours

is this correct?: data can be arranged in visual displays called _graphs_ to make identifying trends easier. (or would it be bar graphs..?

Answers

This is correct. Data visualisation is done through the creation of graphs, which are simply visual representations of data that show relationships between variables. Bar graphs are a particular type of graph. Others include scatter graphs, line graphs and pie charts.

By what number should we multiply -15/28, so that the product may be -5/7?