MATHEMATICS MIDDLE SCHOOL

Is the additiveinverse of a number always, sometimes, or
never negative? Justify your answer with an
example.​

Answers

Answer 1
Answer:

Answer: I think it's sometimes, since additive inverse's yield zero and you could possibly have a negative a value.

Step-by-step explanation:

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Mr.Ravenheads car averages 23.75 miles per gallon of gasoline. Express this amount as a mixed number in simplest form.

Ow many times does 60 goes into 125 for a mixed number

Answers

60 / 125  = mixed number 2 1/12

2х + Зу = 6
— 4х + 3y = 12
x=
y=

Answers

Answer:

-2x+6y

Step-by-step explanation:

2x-4x= -2x

3y+3y= 6y

x= -2x

y= 6y

The answer would be -2x+6y

I really do hope I answer your question!

Ned is training for a biathlon. He will swim every sixth day and bicycle every eighth day. On what days will he both swim and bicycle?? Specified answers please!!

Answers

Answer:

Ned will both swim and bicycle at every 24th day.

Step-by-step explanation:

It is given that Ned swim every sixth day and bicycle every eighth day.

For getting the days will he both swim and bicycle. We have to find Least Common Multiple(L.C.M) of 6 and 8.

6 = 2 × 3

8 = 2 × 2 × 2

⇒ LCM of (6 and 8) = 2 × 2 × 2 × 3 = 24

Hence, Ned will both swim and bicycle at every 24th day.
He will swim and bike on every 24th day. This is because the third 8th and fourth 6th day overlap here. Basically, you have to find the least common multiple.

A car travels 240 miles in 12 hours. what is the rate in miles per hour? in hours per mile?

Answers

The formula to find the answer is:
D is distance
T is time
S is speed

D=240
T=12
S=240/12
so to find S you do 240/12= 20
So the car goes 20mph (miles per hour)
I hope I helped! :)

Answer:

Your answer is 20

Hope this helps have a good day!

Step-by-step explanation:

240 divided by 12 is 20

Enter values for a and b, so that the system of equation shown has one solution y=3x+4 and y=ax+b a=? b=?

Answers

Answer:

a = 3 and b = 4

Step-by-step explanation:

Independent Equations

Lines intersect

One solution

In this case the two equations describe lines that intersect at one particular point. Clearly this point is on both lines, and therefore its coordinates (x, y) will satisfy the equation of either line. Thus the pair (x, y) is the one and only solution to the system of equations. One solution is called "consistent". This shows two distinct non-parallel lines that cross at exactly one point. This is called an "independent" system of equations, and the solution is always some x, y-point.  

Smith drives his car and covers 450 miles in 10 hours.At the same speed, how many hours will it take to cover 540 miles?Plz help

Answers

450\ miles\ in\ 10\ hours\n\n540\ miles\ in\ x\ hour\n\nmaking\ proportion:\n450-10\n540-x\n\ncross\ multiplication\n\n450=540*10\n\n450x=5400\ \ \ \ \ | divide\ by\ 450\n\nx=12\n\nIt\ will\ take\ 12\ hours.
450/10=540/x and than do cross multiply, 450x=5400 divide both side by 450 = 12 hours
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