Mathematics Middle School

Describe how to use the estimated difference to figure out if the difference in ERAs you found is reasonable.


Answer in 3 complete sentences.

Answers

Answer 1

Answer:

Perform the actual multiplication problem either by hand or with a calculator. In this example, students would multiply 21 times 31 to get 651. Subtract the smaller number from the larger one to check for reasonableness. In this example, you would subtract 600 from 651 to get 51.

Step-by-step explanation:

Related Questions

can someone please actually help me?
and not answer just for points.


The total cost of the trip can be found by adding these components:

Entrance fee per student: $5(29)

Lunch costs: $4(29 + 6)

Bus fees: $25 + 8($2 + $3)

Total cost:

5(29) + 4(35) + 25 + 8(5)

Which of these are equivalent expressions of the total cost that use the properties of operations to simplify the math?
5(15 + 14) + 4(31 + 4) + 25 + 40

5(20 + 9) + 4(30 +5) + 25 + 40

5(17 + 12) + 4(33 + 2) + 25 + 40

5(19 + 10) + 4(34 + 1) + 25 + 40

Answers

it meanse 3io2eiprfejfk3mrnfk3fopk1emkfn3j vj  answer is 3

Step-by-step explanation:

It should be B. 5(20+9)+ 4(30+5)+ 25+ 40

The reason why I say that is because 5(29) you would have to Multiply 20 to 5 and 9 to 5 to get the answer. Then 4(35) will also be split 4(30+5) and do the same. And the 25 would stay the same. And 8(5) is also knows as 8 x 5 which gives you 40.

Alright well here goes another one

Answers

Answer:

100 ft.

Step-by-step explanation:

multiply each side by 8 to get the measurement in feet, then add them all up.

(3.5x8)2+(5.5x8)

Answer:

I think it is 100 ft

Step-by-step explanation:

Two trains leave stations 468 kilometers apart at the same time and travel toward each other. One train travels at 85 kilometers per hour while the other travels at 95 kilometers per hour. How long will it take for the two trains to meet?

Do not do any rounding.

Answers

Answer:

It should be 2 hrs 36 minutes

Step-by-step explanation:

Closing speed:: 85 + 95 mph = 180 mph

Ans:: time = distance/rate = 468/180 = 2.6 hrs = 2 hrs 36 minutes


Yo big man 91928273636372819192

Please Help will Give brainlist.

Answers

constant of proportionality is 4

equation: x/y = 4

explanation:
let's take 20 and 5 for example, if you divide 20 by 5, you will 4 of course. that's the proportionality for the first one. if you continue to divide x value by y value you will get 4. for the last two you would divide 28 by 4 and multiply 8 by 4.

Answer:

Constant: 4 i think because you can divide 20 by 4 to get 5 and 24 by 4 to get 6. So then probably the equation: is y=4x BUT DON'T PAY ATTENTION TO ME I GOT A B+ IN MATH:)

Someone Help me with this ASAP!!!!!I

Answers

6 1/5 / 2/5
31/5 / 2/5

1:2'2 + 3 (3-5)2) - 3
2:5 (3) + 2 (3)2) - 7 + 1
3:3 (3 + 4) - (3)2) + 7 (2 - 1)
please help

Answers

1 it’s gonna be one

Help me please PLZZZZZZZZZZZZZZZZZZZ

Answers

Answer:

-5.5

Step-by-step explanation:

Answer:

It's -5.5

Explanation:

I just used my calculator

HELP ME!! IT'S DUE TODAY

Answers

Answer:

it should be C

Step-by-step explanation:

both fractions simplified is 1 1/5

It should be C because both fractions are simplified by 1 1/5

Please help me show all the work and how u got it thank u so much

Answers

i'm not 100% sure. sorry

Answer:

(-2, -6 2/3), (-1, -6 1/3), (0,-6), (1,-5 2/3), (2, -5 1/3)

Step-by-step explanation:

For the values let's use -2,-1,0,1, and 2

The equation we need to use is slope-intercept (y=1/3x-6)

y=1/3(-2)-6

y=-2/3-6

y=-6 2/3

So the point for this one is (-2,-6 2/3)

Next, we'll plug in -1

y=1/3(-1)-6

y=-1/3-6

y=-6 1/3

The point for this one is (-1, -6 1/3)

Now we plugin 0

y=1/3(0)-6

y=0-6

y=-6

the point for this one is (0,-6)

Now we put in 1

y=1/3(1)-6

y=1/3-6

y=-5 2/3

the point is (1, -5 2/3)

Lastly, we plugin 2

y=1/3(2)-6

y=2/3-6

y=-5 1/3

The last point is (2, -5 1/3)

Hope you get a good grade!

7x+22 is greater than or equal to 15

Answers

greater! hope this helps!

Answer:

Not 100% Sure | Greater

Step-by-step explanation:

Find the slope of the line.



Answer Choices:
- 1/4
-4
1/4
4

Answers

Answer:

-1/4

Step-by-step explanation:

The answer is 4, because you rise 4 and run 1 so that’s 4/1 and that simplifies to 4 hope this helps

Yeah, get into this work problem

Answers

y=15x ..................

What is the unit rate if 5 apples cost 10 dollars?

Answers

Answer:

2

Step-by-step explanation:

add 1 1/3+(-5/6) using a number line

Answers

Answer:

Step-by-step explanation:

i do not know how i can add it on a number line but the answer is

0.5

5)
Identify the translation rule on a coordinate plane that verifies that square A(-4,3), B(-4,8), C(-9,3), D(-9,8) and square A'(-3,4), B'(-3,9), C'(-8,4), D'(-8,9) are congruent.
A) (x, y) → (x - 1, y - 1)
B) (x, y) → (x - 1, y + 1)
C) (x, y) → (x + 1, y + 1)
D) the squares are not congruent

Answers

C is the right answer, (x,y) is equal to (x+1,y+1)

Richard had his car repaired at a body shop.

The parts cost $100.
The technician charged $52 per hour.
His total bill was $308.
How many hours did the technician work on Richard's car?

Answers

Answer:

4 hours

Step-by-step explanation:

total bill is 308

take the price of the car part away 308-100=208

this gives the total amount for the no. of hours worked

208/52=4

ps.i like ur peep profile rip:)

Given the equation: 5m + 3 = 3m - 7, what is the value of m? pls will mark Brainliest



1


-5


-2


5

Answers

Answer:

its -5 is the answer i thank.

Answer: -5

Explanation:
To solve this, plug in each of the answers as m (1, -5, -2, 5).

5(1) + 3 = 3(1) - 7
Answer: 8 = -4

5(-5) + 3 = 3(-5) - 7
Answer: -22 = -22

5(-2) + 3 = 3(-2) - 7
Answer: -7 = -13

5(5) + 3 = 3(5) - 7
Answer: 28 = 8

And as you can see, m = -5 gives us the answer -22 = -22, which is correct.

Hope this helped! :3

HEy YOU!.....HELp ME PleASe...
Suppose you receive $100 for a high school promotion present, and you deposit it into a paypal account. Then, each week, you take out $5 to use on snacks at the gas station. Write an equation to represent this situation. Specify what each variable represents.

Answers

Answer:

100/5

Step-by-step explanation:

Make a table of ordered pairs for the equation.
y=−13x+4
can someone please help! im a 7th grader that just got moved into all 8th grade classes and now im really struggling.. can someone please explain how to find ordered pairs for equations ? thanks!

Answers

Answer:

Just plug In values for x and find the output.

Step-by-step explanation:

If x is 1 then y is -1/3(1)+4, which is 11/3. (1, 11/3)

If x is 2 then y is -1/3(2)+4, which is 10/3. (2,10/3)

And so on...

Answer:

wow, congrats on moving up a math grade. sorry to hear you're struggling, hope I can help!

so the rule would be y = [tex]\frac{1}{3}[/tex]x + 4.

to start, say x = 2.

put that into the equation

y = (1/3*2) + 4

y = 2/3 + 4

y = [tex]4\frac{2}{3}[/tex] or 4.66

so if x = 2, y = [tex]4\frac{2}{3}[/tex]

try this again when x = 3.

put that into the equation:

y = (1/3 * 3) + 4

y = 1 + 4

y = 5

so if x = 3, y = 5

I can't put tables into brainly easily, but I hope this helps! goodluck!

pls help me answer this i dont have a lot of time here!! i will give brainliest to the best and correct answer!!!!!1

Answers

3x^6 / 4x is the ansewer because what you have to do in a math problem is subtract the top exponent from the bottom exponent and 11-5=6!!

PLSSSS IS DUE TODAYYYYYYYY 4 + 2(5x - 8) = ax + b If a=10 and b=-4, explain how to find the number of solutions to the equation?

Answers

Answer:

Step-by-step explanation:

Do u have an image

Answer:

No solution?

Step-by-step explanation:

a=10 b=-4

2(5x-8)=10x-4

10x-16=10x-4

10x-12=10x

0=12 (No solution)

I'm honestly not too sure I just went off what was given...

Diego runs 7 miles in 63 minutes. Use the table below to determine how long it would take Diego to run 4 miles at this rate.


A.
28 minutes

B.
36 minutes

C.
45 minutes

D.
54 minutes

Answers

The answer is c no problem !

Answer:

B: 36 minutes

Step-by-step explanation:

First, we need to find out how many minutes it takes him to run 1 mile.

63/7=9    So he runs 1 mile in 9 minutes.

To find out how far he runs in 4 minutes, simply multiply 9 by 4.

9*4=36

It will take him 36 minutes to run 4 miles.

May someone help me i only got a few min to turn this in :(
By the way you have to match them.
And PLEASE match them correctly :,

Answers

oh where’s the photo!!

There are 68 books in a bookcase.

Each shelf holds 12 books.

How many shelves are needed to hold all the books?

Answers

Answer:

6

Step-by-step explanation:

Answer:

6

Step-by-step explanation:

you would round the 5.666666666 to a 6

PLZZ HELP ME ONLY GIVE ME THE CORRECT ANSWER PLZZZ this due today !!!!HELPP DUE IN 25 MIN
ravis received a letter from his bank saying that his checking account balance fell below zero. His account transaction log is shown below.


A. On which line did Travis make a mathematical error? Explain Travis’s mistake.
Show all your work and explanation in order to receive full points.







B.The bank charged Travis a $20 fee because his balance dropped below $0. He knows that he currently has an outstanding charge for $7.85 that he has not recorded yet. How much money will Travis have to deposit into his account so that the outstanding charge does not create another bank fee? Explain.
Show all your work and explanation in order to receive full points.

Answers

Answer:

Step-by-step explanation:Part A is

line 4, it should be -8.

and i dont know about part B i think it would be 27.85 but it depends on what grade ur in because that seems so simple

After buying a skateboard for $188 with a balance of $180 his balance SHOULD be -$8.00 instead of positive $8.00, at the end, his total balance should be $6.05

Write the equations of the following lines. The line is perpendicular to the graph of y=x+1 and passes through the point (1,1).

Answers

Hopefully that helps

HeLp mE GuYs!!!!!!!!!

I ONLY NEED HELP WITH C

Answers

The answer is 18. Hope this helps

Which two square roots are used to estimate the root of 8?


A. Start Root 2 End Root and Start Root 3 End Root

B. Start Root 3 End Root and Start Root 4 End Root

C. Start Root 4 End Root and Start Root 9 End Root

D. Start Root 9 End Root and Start Root 16 End Root

Answers

The answer is A well that’s what I got
I think it’s B because 4 goes into 8

An 11 pound turkey cost $9.79. Find:
a. The cost of a 14.4 pound turkey (round to nearest cent)
b. The cost of a 17.5 turkey (round to the nearest cent)
c. The price per pound at which turkeys are sold.
d. The largest size turkey that can be bought for $20.

Answers

C.the largest per pound at which turkeys sold
C The price per pound

Can someone please help me out on this? :P

Answers

The first one: They are telling you that 1 inch = 1 foot, and the window width is already 4 inches so since your going to convert into feet then look at the “key” and think okay if 1 inch = 1 foot then how many feet does 4 inches equal it would be 4ft
The second question: It’s saying two cities are 5 3/4 inches apart and for every 1/2 inch = 3 miles so first you would take 5 3/4 and divide 1/2 you would get 11 1/2 but that’s not the answer that’s how many inches in all so you would take 11 1/2 and multiply 3 to get how many miles so the answer is 34 1/2 miles
I hope this helps I tried to explain as much as I can so you won’t have trouble on this kinda stuff again:))
The first one would be four feet and the second would be 34 and 1/2 miles
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