when is estimating an effective tool

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Answer 1
when you have a hard question such as 600x800 u know 6x8=48 so u can estimate the rest. (I'm not sure if this can help you but hope it does!)

Related Questions

Isabella has 35 cups of dog food. She feeds her dogs 5 cups of food each day. For how many days will the dog food last?

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35 divided by 5 is 7. The answer is 7 days or 1 week.
It will last 7 days because 7 times 5 equals 35

convert 3.09kg to grams

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If u converted to grams it would = 3090g

:)
3090. Please tell me if this is right!

a=625(1+0.051)(1)(4)

Answers

.If you want to find out the value of "a" then ⬇

a➡ 2627.5 ; which is also called "2627.500

Jabir buys 2.74 pounds of dried pinto beans and 4.05 pounds of dried lima beans. What is the difference between the weights of the beans that Jabir buys?

Answers

The answer is 1.31 because 4.05 - 2.74 = 1.31

Today the ratio of Elinor's age to her mother's age is 3:8. After 15 years, the ratio will become 6:11. What is Elinor's age today?

Answers

Final answer:

Elinor's current age is determined by setting up a system of equations based on the given ratios of her age to her mother's age now and in 15 years. After solving these equations, it is found that Elinor is 12 years old today.

Explanation:

Let's define Elinor's age as E and her mother's age as M. The problem states that the current ratio of Elinor's age to her mother's age is 3:8, so we can write the equation E/M = 3/8. This means 8E = 3M. After 15 years, the ratio of their ages will become 6:11, so the future ages can be expressed as (E + 15)/(M + 15) = 6/11. To solve the problem, we set up the system of equations:

8E = 3M11(E + 15) = 6(M + 15)

First, solve one of the equations for M to find M in terms of E, and then substitute into the second equation to find Elinor's current age:

From 8E = 3M, express M as M = 8E/3Substitute M in the second equation: 11(E + 15) = 6((8E/3) + 15)Expand and solve for E

After solving the equations, we find that Elinor's current age is determined to be 12 years old.

Final answer:

Elinor's current age can be calculated by setting up a system of equations using the given age ratios (3:8 now, 6:11 in 15 years). By expressing the mother's age in terms of Elinor's age and substituting into the equation for their future ages, we find that Elinor's current age is 15 years old.

Explanation:

To find out Elinor's age today, we will first use the given ratios to set up two equations that represent the current ages and the ages in 15 years. Let's denote Elinor's current age as E and her mother's current age as M.

The first ratio given is 3:8, which translates to the equation E/M = 3/8. The second ratio, which will be after 15 years, is 6:11, so the respective equation becomes (E + 15) / (M + 15) = 6/11.

By cross-multiplying the first equation, we get 8E = 3M. We can call this Equation 1. From the second ratio, cross-multiplying gives us 11(E + 15) = 6(M + 15), which simplifies to 11E + 165 = 6M + 90. If we call this Equation 2, we now have a system of two equations to solve for E and M.

Using Equation 1, we can express M in terms of E, which is M = 8E/3. Substituting this into Equation 2, we have 11E + 165 = 6(8E/3) + 90, which simplifies to 11E + 165 = 16E + 90. When we isolate E, we get E = 15. Therefore, Elinor's current age is 15 years old.

The price of a stock decreased by 60 cents one week, decreased 10 cents the next week, and decreased another 20 cents the following week. What is the average change in the price of the stock over the three weeks?

Answers

Answer:

The average change in the price of stock over the three weeks is:

       It decreased by 30 cents per week.

Step-by-step explanation:

It is given that the price of stocks decreased by 60 cents one week.

It decreased by 10 cents in the next week

and 20 in the third week.

Hence, the average rate of change is calculated as the ratio of the sum of the change in the three weeks divided by the number of weeks i.e. 3.

Hence,

[tex]\text{Rate\ of\ change}=\dfrac{-60-10-20}{3}\\\\\\\text{Rate\ of\ change}=\dfrac{-90}{3}=-30[/tex]

As the average rate of change is negative this means that the price of the stocks decreased.

and it decreased by a rate of 30 cents per week.

Answer:

-30 cents per week.

Step-by-step explanation:

What is 4569 divided by 27 ?

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4469/27=169.222
Is the answer!
The answer is approximately 169.22222222222222222222222222222222222222(2 repeating)

Round 25446 to 1 significant figure

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The answer is 30000!
30000 is the answer because it is one significant figure



List the first 5 multiples of 7

Answers

7, 14, 21, 28, and 35
7,14 ,21,28,35 are the first five multiples of seven

i need help! my hw says this:
The expression of 12(x+4) represents the total number of CDs Mei bought in April and May at $12 each. Which property is applied to write the equivalent expression 12x+48?

A. Associative Property of Addition
B. Associative Property of Multiplication
C. Commutative Property of Multiplication
D. Distributive Property
I know it's not D, but please help me figure out which one is correct

Answers

The answer is D because you have to apply the D, or distribute, the number 12 to the x and 4 to get 12x+48.

rename each pair of fractions with common denominators

Answers

what are the option? If there are none 
then you would take the two fractions and multiply the denominators thus making a new fractions. This is called finding the common denominator. 

Ex: 1/2 and 2/3 would have a CD of 6. 

So, you would rename them 3/6 and 4/6

is 2(9z + 9w) + 12w equivalent to 18w + 30z

Answers

No
2(9z + 9w) + 12w
= 18z + 18w + 12w
=18z + 30w
not equal 18w + 30z

The United States uses 24℅ of the world's supply energy What fraction of the world's energy is this ?

Answers

So, the US uses 24% of 100% of the world's energy. As a fraction this is = 7/25

The United States uses 24% of the world's energy supply, and this percentage as a fraction is 24/100, which simplifies to 6/25.

The United States uses 24% of the world's energy supply. To convert this percentage to a fraction, we take the percentage and write it over 100. So 24% becomes 24/100. This fraction can then be reduced to its simplest form by dividing both the numerator and the denominator by their greatest common divisor, which is 4 in this case. Therefore, 24/100 simplifies to 6/25.

To reiterate, the fraction that represents the U.S. consumption of the world's energy supply is 6/25.

25/100 in simplest form

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If we divide both the numerator and the denominator by 25, we would get 1/4 which would be the simplest form
The answer to this is simply 1/4.

what is 3 and 1/5 x 9/10 as a mixed number?

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this answer should equal to be as a mixed number is 2 22/25
I believe the answer is 2 and 22/25

Write 12gh/36g2h3 in simplest form

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It simplifies to 1/3gh^3

73÷1391 find each quotient and the remainder

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the anwser is 19 remainder 4 

The equation that represents the canned goods order is 24x + 64y = 384, where x = number of minutes for producing fruit cans and y = number of minutes for producing vegetable cans. What is the meaning of the y-intercept?

Answers

xint is where the line crosses the x axis or where y=0

that means when you spen 0 minutes producing vegetable cans
that is when you spend all your time making fruit cans

Answer:

Sample Answer: The y-intercept, at the point (0, 6), indicates the choice to produce vegetables for 6 minutes. In 6 minutes, producing 64 cans of vegetables each minute, all 384 cans for the order will be completed. The 0 for the x-value represents that no time is spent producing cans of fruit.

Step-by-step explanation:

How do you convert 2/5 into a decimal?

Answers

2/5 convert into a decimal divide 5 by 100 or 10  and then you would get 20 or 2 and there are 2/5 so that would be 0.4 or 0.40
Answer 0.4
Multiply both numbers by 2.

4/10 = 0.4

Mia has n pairs of earrings. She receives 3 more pairs of earrings. Which expression represents the number of earrings Mia has now? A. n−3 B. 3n C. 3n+3 D. n+3

Answers

D. n+3

Hope this helps. 
The answer would by D. n + 3, because if Mia has n, and she gets 3 extra, she is only adding 3 to her current n. Hope this helps!

Jake needs 9 pieces of rope that are each the same length. He cuts the pieces from a rope that is 8 yards long and uses up the whole piece of rope. How long is each piece of rope?

Answers

9 pieces of rope form an 8 yard long rope

Divide.

8/9 yards of rope.

8/9 is approximately 0.89.

So 8/9 yards of rope or 0.89 yards of rope.

Marissa was decorating her room. She arranged 63 picture tiles on a wall in the shape of a rectangle. How many rows of tiles could be on the wall? A:2, B:5 C:6 D:9 which could be the answer?

Answers

The answer is D. because 9x7=63 and since you don't have 2 of the same number it is a rectangle not a square

an adult elephant drinks about 225 liters of water each day. Is the number of days the water supply lasts proportional to the number of liters of water the elephant drinks? I need to know if it's proportional I already know the actual table (1 day is 225 etc...) I just need to know if it's proportional

Answers

10-14 gallons a day. hope that works

Answer:

The number of days the water supply lasts is proportional because there is a constant ratio in the number of liters the elephant drinks.

Step-by-step explanation:

Do number 4 and get 79 points

Answers

Using the given fractions,2/3÷1/8
Applying the fractions formula for division,=2/3×8/1
Simplifying 16/3,
the answer is=5 1/3
So 6 is correct

Function 1: y = 4x + 5
Function 2: The line passing through the points (1, 6) and (3, 10).

Which of these functions has the greater rate of change?
A) Function 1, because the slope is 5 and the slope of function 2 is 4.
Eliminate
B) Function 1, because the slope is 4 and the slope of function 2 is 2.
C) Function 2, because the slope is 7 and the slope of function 1 is 5.
D) Function 2, because the slope is 5 and the slope of function 1 is 4.
PLS HELP FIRST PERSON TO SHOW THERE WORK AND GET THE RIGHT ANSWER WILL BE THE BRAINLIEST

Answers

the answer is b
hope this helps

how many times more people attended shows in 2006 17.1 than in 2009 14.3? Round your answer to the nearest tenth.

Answers

Answer:

2.8

Step-by-step explanation:

So you get 2.8 and since its already rounded your answer is 2.8

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

The times more people attended shows in 2006 than in 2009 is 2.8.

What is an expression?

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

The number of people who attended in 2006.

= 17.1

The number of people who attended in 2009.

= 14.3

The times more people attended shows in 2006 than in 2009.

= 17.1 - 14.3

= 2.8

Thus,

The times more people attended shows in 2006 than in 2009 is 2.8.

Learn more about expressions here:

https://brainly.com/question/3118662

#SPJ2

can somebody please help me with this co.

Answers

2:24 5:60 7:84 10:120 12:144
Unit rate is 1/2
23*12=276 ounces
9.5:114 no. Wouldn't use a half pack.
24:2 36:3 66:5.5 108:9 180:15
Multiplication

draw a quick picture to show 2.63

Answers

Draw 2 big 100 tile things. 6 10-tiled sticks. 3 one-tiled units

what divided by what equals -3 in decimal or fraction form. PLZ HELP THIS IS MAJOR.

Answers

Edited answer:
________________
-3.0 ÷ 1 =  3.0 ; is an answer.

Please help me!

4. Stephen wrote the problem 46.8 divided by 0.5. What is the correct quotient?

Answers

Final answer:

To find the quotient of 46.8 divided by 0.5, we use long division. The correct quotient is 136.

Explanation:

To solve the division problem 46.8 divided by 0.5, we can use long division. Here are the steps:

Divide 46.8 by 0.5 to get the quotient. Since 0.5 is smaller than 46.8, we start dividing.We divide 4 by 0.5 to get 8. Since 8 is smaller than 46, we bring down the next digit, which is 6.We divide 46 by 0.5 to get 92. Since 92 is smaller than 68, we bring down the next digit, which is 8.We divide 68 by 0.5 to get 136.

The correct quotient is 136.

Final answer:

The correct quotient when dividing 46.8 by 0.5 is 93.6, since dividing by 0.5 is equivalent to multiplying by the reciprocal, which is 2.

Explanation:

The student's question is about finding the result of the division 46.8 divided by 0.5. To find the correct quotient, follow these steps:

Understand that dividing by 0.5 is the same as multiplying by 2 because 0.5 is equivalent to 1/2, and the reciprocal of 1/2 is 2.Multiply 46.8 by 2 to find the quotient.The result is 93.6.

Therefore, the correct quotient when 46.8 is divided by 0.5 is 93.6. Recognizing the reciprocal relationship, dividing by 0.5 is equivalent to multiplying by 2. By implementing this understanding and multiplying 46.8 by 2, the correct quotient is determined to be 93.6. This approach clarifies the process involved in dividing by fractions and offers a clear solution to the student's question.

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