MATHEMATICS MIDDLE SCHOOL

Traveling at 55 mph, how many minutes, rounded to the nearest whole number, does it take to drive 310 miles from Boston to Syracuse?

Answers

Answer 1
Answer:

we know that

speed=(distance)/(time)

Solve for the time

time=(distance)/(speed)

in this problem

speed=55(miles)/(hour) \n \n distance=310 miles

substitute in the formula above

time=(310)/(55) \n \n time=5.64\ hours

convert to minutes

5.64*60=338.4\ minutes =338\ minutes

therefore

the answer is

338\ minutes
Answer 2
Answer: (310 mi)/(55 mph)*(60 min / 1 hr) = 338.181818 . . . .

rounds to 338 minutes

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on Saturday Leo and his brother drove into town to visit their mom Leo is trying to remember how much he spent on gas and tolls tolls were a dollar $1.75 each and he also spent $28 at the gas station to fill up what are the terms and their factors and coefficients of the algebraic expression that represents the total cost of gas and tolls

Answers

Let t be the number of tolls they crossed.

Amount they spent at each toll = $1.75.

Amount they spent at gas station = $28.

Let C be the total amount they spent on gas and tolls.

If they crossed 1 toll, then

C = 28 + 1.75(1).

If they crossed 3 tolls, then,

C = 28 + 1.75(3)

If they crossed t tolls, then,

C = 28 + 1.75t

Here, the terms are 28 and 1.75t and the factors are 1.75 and t.

Write and equation of a line that is parallel to the line below and passes through the given point

Answers

a line parrelel would have the same slope

in y=mx+b   m=slope and b=yintercept

so y=-2/3x-5 
the point you want is -3,11 or this equation is true when x=-3 and y=11 are true so subsitute and solve for the new 'b'

11=-2/3(-3)+b
11=2+b
subtract 2 from both sides
9=b

the equaqtion is y=-2/3x+9
If one line is parallel to another, that means the two lines have the same slope.  Therefore, since the line you are creating is parallel to the line y = -2/3x - 5, it's slope must be the same, -2/3.  Additionally, you know it passes through the point (-3, 11).

If you don't remember the slope-intercept equation, it looks like this:
y = mx + b, where m is the slope, b is the y-intercept, and x and y are, well, x and y.

Let's plug in the slope we know it must have (-2/3)  and plug in the (x, y) coordinates we were provided so that we can find b.
11 = -2/3(-3) + b

Solve for b:
11 = 2 + b
9 = b

Now we know our slope and our y-intercept, after solving for it, so we can write our final equation!

The answer is: y = -2/3x + 9

My math teacher is giving me a question about the mean absolute deviation. I don't really get it. Some help please.

Answers

well, you didn't show the question but i can tell you this: first find the mean of the data set.
1) 1+2+3+4=10    10/4(amount of #)=2.5
then, subtract the mean from each number in the data set.
2) 1-2.5= -1.5; 2-2.5= -0.5; 3-2.5= 0.5; 4-2.5= 1.5
convert all these numbers to positive, then add them together.
3)1.5 + 0.5 + 0.5 +1.5 = 4
divide the total by the amount of # in the data set
4/4=1
the MAD in this case is 1.

Hope i helped!! :)

Marina earns $15 for 1 hour of babysitting, $23 for 2 hours of babysitting, and $31 for 3 hours of babysitting. Write a function to describe the sequence.REALLY STUMPED ON THIS ONE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! PLZ PLZ HELP!!!!!!!!!!!

Answers

This isn't proportional 

you cant do that because its not proportional. You could show that as your answer the teacher will probably agree with you because that happens to me all the time

Expand the expression 2(r - 4) + 5(r + 2). Express your answer in simplest form

Answers

2(r - 4) + 5(r + 2) =2r-8+5r+10=7r+2
2r-8+5r+10 so 8r+2 would be the final answer

3(6x) y+y+y. 2(8x). 3+x+6

Answers

Answer:

Adding the expressions you get 35x + 3y + 9

Multiplying you get 864x^3 y + 7776x^2 y

Step-by-step explanation:
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