@geny55

- OregonDuck

@geny55

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- OregonDuck

Exam: 01.10 Module One Test Part Two

- OregonDuck

The number line shows the distance in meters of two divers, A and B, from a shipwreck located at point X:
a horizontal number line extends from negative 3 to positive 3. The point labeled as A is at negative 2.5, the point 0 is labeled as X, and the point labeled B is at 1.5
Write an expression using subtraction to find the distance between the two divers. (5 points)
Show your work and solve for the distance using additive inverses. (5 points)
@geny55

- anonymous

b is 1.5 away from x and a is 2.5 away from x

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## More answers

- OregonDuck

you did this what was your answer?

- anonymous

You added the amount of units A was away from zero bc that is where X is and then you added the amount away from x to B

- anonymous

0 - 1.5=-1.5
2.5 - 0= 2.5

- OregonDuck

write it out like
A)...
B)...

- anonymous

A ) 1.5
B ) 2.5

- OregonDuck

show your work for b plz

- OregonDuck

NO NO NO

- anonymous

what

- OregonDuck

what is the answer for this:
Write an expression using subtraction to find the distance between the two divers. (5 points)

- anonymous

i dont know that one.. so sorry

- OregonDuck

@steve816 help with this plz

- anonymous

can you help me now?

- OregonDuck

no i need help with 4 essays first

- anonymous

ok ill help

- anonymous

next!

- OregonDuck

Write an expression using subtraction to find the distance between the two divers. (5 points)
i need this to move on

- anonymous

i dont know that one

- OregonDuck

what is this one
Show your work and solve for the distance using additive inverses. (5 points)

- anonymous

im not very sure with this question.. give me another question

- OregonDuck

A jar contains 0.75 liter of blackberry juice and 0.60 liter of blueberry juice. Patrick poured 0.25 liter of guava juice into the jar. He then drank 0.20 liter of the mixture.
Part A: Write an expression to represent the total amount of juice left in the jar. (5 points)
Part B: Identify which property is used in each step to simplify the expression. (5 points)

- anonymous

for part A is {(0.75+0.60)+0.25}- 0.20

- anonymous

good?

- anonymous

look lets do this

- OregonDuck

yup

- OregonDuck

I need b

- anonymous

what is:
0.75+0.60+0.25=...?

- OregonDuck

1.6

- anonymous

ok! Now we have subtract 0.2 liters, so we can write:
1.6-0.2=...?

- anonymous

@OregonDuck

- OregonDuck

yeah i am back

- OregonDuck

what is b

- anonymous

ok! Now we have subtract 0.2 liters, so we can write:
1.6-0.2=...?

- OregonDuck

1.4

- OregonDuck

what is the answer to b?

- anonymous

just continue with me

- anonymous

ok! that's right. That's your answer to the first part of your question

- OregonDuck

ok

- anonymous

now lets do the next part

- anonymous

at the first step, we have applied the associative property of addition, since we have wrote this:
(0.75+0.60)+0.25=1.60

- OregonDuck

sorry it glitched

- OregonDuck

yeah

- anonymous

at the second step, we have computed a subtraction, so we have applied the rule in order to perform a subtraction

- anonymous

done!

- OregonDuck

what is b?

- anonymous

b is :
at the first step, we have applied the associative property of addition, since we have wrote this:
(0.75+0.60)+0.25=1.60
at the second step, we have computed a subtraction, so we have applied the rule in order to perform a subtraction

- OregonDuck

ok

- OregonDuck

The elevation of city A is 72 feet above sea level; the elevation of city C is 24 feet above sea level. The elevation of city D is 1 over 4 of the elevation of city C.
Part A: Write an expression to represent the elevation, in feet, of city D. (5 points)
Part B: Simplify the expression and explain why the answer is negative or positive. (5 points)

- anonymous

Part A :
D = (1/4) * C
D = 1/4 * 24
D = 24/4 = 6 ft above sea level
Part B : Your answer is positive because D is still above sea level...if it would have been below sea level, then it would have been negative

- OregonDuck

thxs

- OregonDuck

The temperature of a city changed by −12 degrees Celsius over a 2-week period. The temperature changed by the same amount each week.
Part A: Write an expression to show the average change in the temperature of the city each week. (5 points)
Part B: Simplify the expression and explain, using words, what your answer means. (5 points)

- OregonDuck

last one

- anonymous

ok

- anonymous

you would have, t=-6w (temperature = -6 degrees multiplied by the week)you can simplify this to, -6=t/w which gives you negative six is equal to the temperature divided by the weeks

- OregonDuck

that a?

- OregonDuck

is that a?

- anonymous

hold on

- OregonDuck

kk

- anonymous

i dont know this one :(

- OregonDuck

ok give me a sec then

- anonymous

ok

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