MATHEMATICS MIDDLE SCHOOL

A car travels at a constant speed. What is the car's speed between checkpoints, expressed as a unit ratecheck point a 1:00 120 miles
check point B 3:00 208 miles

Answers

Answer 1
Answer: find the time difference which is equal to 2hrs
now find the distance traveled which is 88 miles
now divide the distance with time and answer is 44 miles/hour

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Write one number that is a factor of 13

Answers

1,13 are the only possible factors
I'll do better than that.
I'll write ALL of them:

' 1 '  and  ' 13 '.

That's all there are.

Which ones do I choose?

Answers

Answer:

-6w-22

Step-by-step explanation:

-3(2w+6)-4=

= -6w-18-4=

= -6w-22

So,choose C (none of the above) :)

Write 120% as a fraction.

Answers

6/5 because each 1 equals 20%. so 1/5=20%, 2/5=40%, 3/5=60% and so 5/5=100% so 6/5=120%. hopefully that helps.

120% as a fraction in simplest form is 6/5.

What is a fraction?

In Mathematics and Geometry, a fraction simply refers to a numerical quantity (numeral) which is not expressed as a whole number. This ultimately implies that, a fraction is simply a part of a whole number.

In this exercise and scenario, we would convert the given percentage 120% into a fraction by dividing as follows;

120% = 120/100

By dividing both the numerator and denominator by 20, we have:

Fraction: 120/100 = 6/5.

Read more on fraction here: brainly.com/question/29367657

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How much is 45 minutes plus 45 minutes

Answers

the answer would be 1 1/2 ok an hour because you just have to know really what 90 minutes equal
the answer is 90 ........ that is it

What the simplest form for the ratio 10:4

Answers

5:2 is the simplest form of the ratio 10:4

Rollie was succesful in losing weight he had a goal weight in mind he went on a diet for three months each month he would lose one third of the difference between his current weight and his goal weight and an additional three pounds at the end of three months he was just 3 pounds over his goal weight how many pounds did he lose in those three months? Explain

Answers

let's say that in the beginning he weighted x and at the end he weighted x-y, y being the number of kg he wanted to loose.

first month he lost
y/3

then he lost:  
(y-y/3)/3
this is
(2/3y)/3=2/9y
explanation: ((y-y/3) is what he still needed to loose: y minus what he lost already

and then he lost
 (y-2/9y-1/3y)/3+3 (the +3 is his additional 3 pounts)
 (y-2/9y-1/3y)/3-3=(7/9y-3/9y)/3+3=4/27y+3

it's not just y/3 because each month he lost one third of what the needed to loose at the current time, not in totatl

and  the weight at the end of the 3 months was still x-y+3, 3 pounds over his goal weight!


so:  x -y/3-2/9y-4/27y-3=x-y+3

we can subtract x from both sides:
-y/3-2/9y-4/27y-3=-y+3
add everything up:

-19/27y=-y+6

which means
-19/27y=-y+6

y-6=19/27y

8/27y=6
4/27y=3
y=20.25

so... that's how much he wanted to loose, but he lost 3 less than that, so 23.25

ps. i hope I didn't make a mistake in counting, let me know if i did. In any case you know HOW to solve it now, try to do the calculations yourself to see if they're correct!
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