Mathematics Middle School

When should Estimation not be used?

A. When adding many numbers mentally

B. When subtracting large numbers mentally

C. when finding the exact amount

Answers

Answer 1

Answer: c

Step-by-step explanation:

Answer 2
C. when finding the exact amount

Related Questions

I am DESPERATE!!! PLEAAASE!! I WILL DIEEEE

toy train blocks made of 6 inches long or 7 inches long can be hooked together to make longer trains. which of the following train-lengths cannot be by hooking together either 6 inch tran cars, 7 inch cars, or a combination of both: 29 inches, 30 inches, 31 inches, 32 inches, 33 inches

Answers

Answer:

29

Step-by-step explanation:

6 or 7 inches

29 can't be

30 can be 6*5

31 (1*7)+(4*6)

32 can be (2*7)+(6*3)

:)

have a nice day

and u survived ::)))

Answer:

29 inches

Step-by-step explanation:

For the following I just used trial and error and experimented with the possibilities:

29 inches - This is the only one that does not work.

30 inches - We can use 5 of the 6 inch trains, so this is possible.

31 inches - We can use 4 of the 6 inch trains and 1 of the 7 inch trains, so this is possible.

32 inches - We can use 3 of the 6 inch trains and 2 of the 7 inch trains, so this is possible.

33 inches - We can use 2 of the 6 inch trains and 3 of the 7 inch trains, so this is possible.

HELPPPPP ASAP PLSPLSPLSPLSPLSPLSPLSPLSPLS

Max is scuba diving at an elevation of −64.5 feet when his friend signals to come higher. Max makes two ascents, each an equal distance, to reach an elevation of −21.4 feet, where his friend is located. What was Max's elevation after his first ascent? Enter your answer as a decimal in the box.

Answers

Answer:

-42.95ft

Step-by-step explanation:

First, find the change in elevation between where Max starts and where his friends are:

-21.4ft-(-64.5ft)=43.1ft

Since we're told that he makes two equidistant ascents, we know that each ascent would be equal to:

43.1ft/2=21.55ft

Now we take the height that he started at and add the height that he would gain in his first ascent

-64.5ft+21.55ft=42.95ft

I promise I will give you a crown if you do it right.
Q. Arrange the following integers in ascending order.
a. 3902, -3923, -3454, -3345, 3623, -3212.
b. 1005, -1090, -1420, -1230, 1302.
c. -100, -110, -99, 99, 101, 110.
d. 9990, 9011, 9909, -9099, -9990, 9099.

Answers

Answer:

A) -3923, -3454, -3345, -3212, 3623 and 3902.

B) -1420, -1230, -1090, 1005 and 1302.

C) -110, -100, -99, 99, 101 and 110

D) -9990, -9099, 9011, 9099, 9909, 9990

Step-by-step explanation:

Sally has 243.75 pieces of candy. John has 27.4 pieces of candy. How many pieces of candy do they have in all? John thinks altogether there are 217.15 pieces of candy. Is he correct? Explain your thinking.

Answers

Answer:

Yes, John is correct.

Step-by-step explanation:

To find the total amount of candy you must add the amounts Sally and John have. Sally has 243.75 and John has 27.4. When you add those two together you can 217.5 which is what John thinks therefore he is correct.

Stella paid $75 to eat at a fancy restaurant. If she tips her waiter 20%, what is her total bill?

Answers

Answer:

Her total bill is $90

stellas total bill is 90$

Create a scatterplot displaying the data in the table. Be sure to include a linear trend line. (2 points)

Answers

Can you show more information please?

Answer:

Using technology, the linear regression equation which models the data of the relationship between the number of customers served and tips received is :

y = 1.87x + 3.66

predicted amount of tip for 100 customers = $191

The predicted amount of tips received of 100 customers are served :

y = 1.87x + 3.66

x = 100 ; substitute x = 100 into the equation

y = 1.87(100) + 3.66

y = 187 + 3.66

y = 190.66

Hence, about $191 would be received on tips if 100 customers are recorded.

Using a regression calculator to make prediction from a data table :

Enter the x and y axis data into the appropriate column so that the calculator can display the actual data model. Hence, given a certain value of either variable, the predicted value of the required variable can be calculated from the model.

Step-by-step explanation:  I'm not sure since you didn't add a picture

include reasoning pls

Answers

D.
Because if you multiply numbers with the same sign you get a positive. If they have different signs, you get a negative.
D.

Explanation: Because of the inverse of a positive is that positive number and back again.

Example: -2 - 2 = 0[ Also zero pairs ]
0 is positive

Mrs. Parker has a small garden in her backyard. The total area of her garden is 3.5 square meters. The length is 5 meters.


What is the width of Mrs. Parker’s garden?
A.
0.7 meters
B.
70 meters
C.
0.07 meters
D.
7 meters

Answers

Answer:

B. 0.7

Step-by-step explanation:

3.5/5=0.7

A! If you work backwards, 5*0.7=3.5 or 3.5/5=0.7

Please help this is due soon!

Answers

12% = 12/100 = 3/25


Hope this helps
12% is equal to 12/100 as percentage is out of 100 and the fraction can be simplified by dividing by 2 to get 6/50 and then again to get 3/25

Today, the price of a new cell phone is $529. In 2000, the price of a similar cell phone was $149. Is this is price increase or decrease?

Answers

Answer:

The price of a similar cellphone today has increased

Answer:

increase

Step-by-step explanation:

Because the price went by $380.

The total length of fabric needed is 375 m.

65% of 375 meters can be written as 0.65× 375 m = 243.75 m

The length of fabric still needed is 375 m − 243.75 m =

___m

Answers

Answer:

375 - 243.75 = 131.25

Step-by-step explanation:

The length of fabric still needed is 131.25 m.

Hope this helped!

Sergio claims that StartFraction 20 Over 20 EndFraction = 1 percent. Which statement is true regarding his claim?

Answers

Answer: You dont give the statement. But 20/20 is 100% if that helps!

Step-by-step explanation:

What is the range of possible sizes for side x?

Answers

Answer:

it might be 8-9.5 correct me if i am wrong

Step-by-step explanation:

I believe the answer is 8-10.5

27 percent of the class prefers barbecue chips 2 regular potato chips. If there are 100 students in the class how many students do not prefer barbecue chips

Answers

Answer:

73

Step-by-step explanation:

73% of the students do not prefer BBQ chips

help me pweas

Jacob sells homemade skateboard decks for a profit of $27 per deck. He is considering switching to a new type of material that will increase his profit, as expressed by the function y = 32x, where x is the number sold and y is the amount of profit.

How many more dollars will Jacob earn on each skateboard deck if he switches to the new material? Explain how you found your answer. (5 points)

Answers

Answer: I think that it is 32

Step-by-step explanation: I think this because in your equation it says (y=32x) which 32 will mean how much he is charging for each skateboard, x will be how many he sells, and y would be how much he makes from selling them. So if he sold 2 skateboards you would do 32 x 2 which equals 64 soo that would be (64=32x2) so it is 32

Answer:

32 <3

Step-by-step explanation:

Which steps show how to use the distributive property to evaluate 5x58?

Answers

Answer:

C

Step-by-step explanation:

C will be the answer.

5X58=290

What is (6/3×21/9)÷[8.9+2/4]×14×84

Answers

Answer:

The answer I got was 583.82

calculate the sum, divide and reduce, then calculate and you’ll get 27440/47

Please help me
(????)

Answers

Answer:

c

Step-by-step explanation:

can someone tell me what this is


6% OF 56% X 60% X 40%

Answers

Answer:

Step-by-step explanation:

6% of 56 is 10.71

6% of 60 is 10

6% of 15

hopefully this answers your question

6% of 56 is 10.71

6% of 60 is 10

6% of 15

After this, I think you may want to multiply 10.71, 10, and 15. Unless you were trying to separate all the numbers. If you weren't, its 1606.5!

Which fraction and decimals forms match the long division problem?

Answers

Answer:

A

Step-by-step explanation:

the numerator always goes into the dividend, and in this case the dividend is 7, so 7/9 is correct rather than 9/7. and the decimal form is 0.7777777+ it is not 0.7 because the question keeps adding zeros when the whole number is supposed to be 7, not 7.000. hope that helps.

The answer is A because when you divide the numerator in to the denominator you get what you have there so 7 divide 9 is equal to 7/9!

Mai’s family drinks a total of 10 gallons of milk every 6 weeks.
How many weeks will it take Mai’s family to finish 3 gallons of milk?
Gallons of milk per week
OR Weeks per gallon of milk

Answers

A: gallons of milk per week

Bc: the order matter in this equation

6/3=2
2Gallons of milk per week

The tables show the numbers of white and yellow flowers Cara and Hector used in 5 different arrangements.

Cara's Flower Arrangements
White 3 6 9 12 15
Yellow 5 10 15 20 25

Hector's Flower Arrangements
White 4 8 12 16 20
Yellow 6 10 14 18 22

Part A
Are the numbers of white and yellow flowers in Cara's arrangements proportional?
Which equation relates the number of white flowers, w, to the number of yellow flowers, y?
A. Yes; y=35w
B. Yes; y=53w
C. No; y=3w+5w
D. No; y=5+3w
Part B
Are the numbers of white and yellow flowers in Hector's arrangements proportional?
Write an equation to relate the number of white flowers, h, to the number of yellow flowers, e.
A. Yes; e=32h
B. Yes; e=23h
C. No; e=h+2
D. No; e=h−2

Answers

Answer:

Step-by-step explanation:

Part A

Yes, there is a proportional relationship in Cara's. For every 5 yellow flowers, there are 3 white flowers. 5:3. I didn't see an equation that would work for the equation in the question. The equation I found on my own would be 5w/3 = y

Part B

There is no proportional relationship in Hector's. The equation would be e=h-2.

Bruce walks 3/4 mile in 1/5 hour. What is his speed in miles per hour? (label your answer mph) * worth 25 points and brainlyiest pls no links or deleting this Ty

Answers

The answer to this question is 3.75

i need help i will give 19 po.ints

Answers

-5 7/10

How?

13 4/5

8 1/10

you need similar denominators.

13 4/5 x 2 = 13 8/10

13 8/10 + ? = 8 1/10

8 1/10 + 5 7/10 = 13 4/5

(5 7/10 turned negative bc its below sea level and your technically adding.)

MAY BE INCORRECT!

Answer:

5 7/10

Step-by-step explanation:

you would need to subtract 13 4/5 - 8 1/10 t get positive 5 7/10

(i got this right o my test)

May I please get help with my math lesson if possible I don't know why they are 4 answers if 1 of the answers don't apply to any of the questions it fine just leave it blank

Answers

Answer: S1:E7 ; S2:E1 ; S3:E5

Step-by-step explanation:

What we know:

3 answers applyWe need to find which answers go with each question

**A lot of info is problem-specific.

How to solve:

Since we only need to write the equations, we simply need to find the x and y variables, and the total.

Process:

Problem 1:

Find the x                                                                     5.50Find the y                                                                     3Find the total                                                                145Write equation                                                      5.50 + 3 = 145

Problem 2:

Find the x                                                                     2.50Find the y                                                                     0.75Find the total                                                                25Write equation                                                      2.50 + 0.75 = 25

Problem 3:

Find the x                                                                     2Find the y                                                                     5Find the total                                                                50Write equation                                                        2 + 5 = 50

Solution: S1:E7 ; S2:E1 ; S3:E5

Answer:

S1:E7  S2:E1  S3:E5 Have a great day...

Step-by-step explanation:

Please helptyank you

Answers

Answer: this is the answer

Step-by-step explanation: this then that then this

I suck with this too so can some help me?

Answers

Finishing off the sentences below in the pic:

The area of each circle is exactly 2.25 pi square inches.

(As the area of a circle is: Area = pi x radius^2).
Therefore the area is: 1.5^2 x pi
Area: 2.25pi


There are TWO identical circles in the cylinder.

(Think of a cylinder and recall that a cylinder has a circle on the top and bottom of the 3-D shape, therefore a cylinder has two identical circles)


So the total area of all the circles is 4.5pi square inches.

(Adding the area of the two identical circles together, where 2.25pi + 2.25pi = 4.5pi)

Answer:

...

Step-by-step explanation:

Read the problem below and answer the question.

Answers

Answer:

7.9375

Step-by-step explanation:

cuz divide it 35.75÷4=7.9375

7.9375. you get this answer by dividing 35.75 by 4

A circle has a radius of 15 centimeters and an area of 225π cm2. If the radius is multiplied by 3, what is the area of the new circle?

Answers

Shape: Circle
Area: (pie)(radius)^2
(Work shown in photo below)

PLS HELP IM GONNA FAIL MATH
How long is the fence around a circular field with a radius of 340 ft.?

Answers

Answer:

so you are trying to find the circumference and the formula is 2πr

so the answer is 2 × 3.142 × 340 ft = 2136.56 ft

I think that's the answer

The answer would be 2 x 3.14 x 340ft = 2021.60
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