Mathematics Middle School

Which expressions result in a product that has a best estimate of 80? Select all that apply.

A. 0.82 x 112
B. 42.3 x 21
C. 1.2 x 78
D. 0.19 x 37
E. 8 x 9.62

Answers

Answer 1

Answer:

Step-by-step explanation:

E and B are he answers

Answer 2

Answer:

Step-by-step explanation:

i took it and it was a, c and e

Related Questions

Do these questions, plz ☹️☹️

Answers

1.

He fills 5/6 lb per bag.
If he fills up 6 bags, he will use 6 * 5/6 lb = 5 lb.
Since he gets peanuts in 2-lb bags, he'd use 2 1/2 2-lb bags.
If he fills double that amount, 10 5/6-lb bags, he will use 10 lb of peanuts which is exactly 5 2-lb bags.
Answer: He should buy 5 2-lb bags.

2.

Each board has length x.
He cuts 3/5 of the length.
Each leftover piece is 2/5 of the length, or 2/5 x.
When he puts together several of the leftover pieces, he has 4 times the length of the original board, or 4x.
4x/(2/5 x) = 4x * 5/2 x = 10x

He has cut 10 boards.

George is saving for a mortgage on a $125,000 house. He needs 20 percent for a down payment. He currently has $22,000. How long will it take George to save the rest of the money when he earns 5 percent interest per year?

(This is an economics question)

Will it be 2years, 1year, 3years or 5years?

Answers

George will have enough money in 3 years. This is because at 5 percent interest per year, in one year he will have $23,100. In two years, he will have $24,155. In 3 years he will have $25,362.75 which will put him slightly over his goal of a 20% down payment.

Answer:

3 years

Step-by-step explanation:

what is the function of delta sign in maths

Answers

The uppercase delta Δ means "change in" so for example: Δx = difference between two x values.

The lowercase delta which Brainly does not have, looks like a squiggly lowercase d. It generally means "very small change in".

Final answer:

The delta sign (Δ) in mathematics indicates a change in a certain quantity, calculated by subtracting the initial value from the final value, commonly used for indicating displacement in physics.

Explanation:

The delta sign (uppercase Greek letter delta, Δ) is commonly used in mathematics to denote a change in a certain quantity. When we say Δx, it signifies the 'change in x' or the difference between the final and initial values of 'x'. This is typically calculated by subtracting the initial value xo from the final value xf. For instance, if we're calculating displacement, which is a change in position, we subtract the starting position xo from the ending position xf to get Δx. The SI unit for displacement is the meter, but other units such as kilometers may also be used, requiring conversion to meters for consistency in calculations.

Erica's cell phone bill for July was $82. She sent a check for $50 and then made $37 worth of calls in August. How much did she owe on her cell phone bill?

Answers

the Answer is -69 because if you lay out the problem it is -82+50-37=-69

Ogden and Sylvio are both running backs for their respective football teams. Sylvio ran for a total of 82 yards while Ogden ran for a total of -21 yards. What is the difference in the number of yards they ran?

Answers

The difference between the yards is -103

Is 15/2 greater then square root of 55

Answers

Final answer:

Yes, 15/2 is greater than the square root of 55.

Explanation:

To compare whether 15/2 is greater than the square root of 55, we can convert both expressions to decimal form.

15/2 = 7.5 and √55 ≈ 7.416. Therefore, 15/2 is greater than the square root of 55.

Which of these graphs represents a function?
A)
B)
C)
D)

Answers

C) Is the only graph that is a function because A) is a connection of points, B) is a polar graph, and D) has imaginary solutions.
The answer of your question is C. because it touches once try using a pencil if the line touch the pencil twice then it's not a function :)

Write 1.04 x 10^2 in standard form

Answers

 1.04 x 10^2 in standard form = 104

----------------

Answer:

The required standard form is 104.

Step-by-step explanation:

Consider the provided number.

you can convert the scientific notation into long hand notation as shown:

If the exponent of 10 is a positive number then you need to move the decimal point right as much as the exponent value.

If the exponent of 10 is a negative number then you need to move the decimal point left as much as the exponent value.

Now consider the provided number.

[tex]1.04 \times 10^2[/tex]

Here the power of 10 is positive, so move the decimal point right as shown.

[tex]104[/tex]

Hence, the required standard form is 104.

Given that the hypotenuse of this right triangle is 25 cm long and that tan(Θ) = 3 Find the values of x and y, accurate to the nearest tenth. A) x ≈ 7.9; y ≈ 23.7 B) x ≈ 23.7; y ≈ 7.9 C) x ≈ 7.9; y ≈ 26.4 D) x ≈ 26.4; y ≈ 79.1

Answers

The wording of this problem indicates that there was an illustration.  Could you possibly share that illustration?

Working without an illustration:

If tan theta = 3, then tan theta = opp/adj = 3/1.  This tells us that the opp side is 3 times as long as is the adj. side.  Let x be the shorter side, i. e., let x represent the adjacent side; then y is the longer side and represents the opposite side.

Then y = 3x (the opp side is 3x the adj side in length).

Applying the Pyth. Thm.    a^2 + b^2 = c^2,

x^2 + (3x)^2 = hyp^2 = (25 cm.)^2

So x^2 + 9x^2 = (625 cm^2)

10x^2 = 625 cm^2, or x^2 = (625 cm^2) / 10 = 62.5 cm^2

x = 7.91 cm.  Therefore, y = 3(7.91) = 23.72 cm.

We were supposed to round off these answers to the nearest 10th cm.
Therefore, x = 7.9 cm and y = 23.7 cm

Would that be A, B, C or D?

Answer:


Step-by-step explanation:

The right triangle above you can use SOHCAHTOA and determine that tanθ =

y

x

. Replacing tanθ with 3 you get

3 =

y

x


3x = y


Then use the Pythagorean Theorem to

x2 + y2 = 252. Replace y with 3x

x2 + 9x2 = 625

10x2 = 625

x2 =

625

10


x =

25

10

= 7.9


Since,

y = 3x

y = 3(7.9) = 23.7


x ≈ 7.9; y ≈ 23.7


There are 16 sixth graders and 20 seventh graders in the robotics club. For the first project the club sponsor wants to organize the club members into equal size groups. Each group will have only sixth graders or only seventh graders how may students will be in each group if each group has the greatest possible numbers of club members?

Answers

You will have 9 groups and the max will be 4 people in each group

Answer:

There will be 4 students in each group and there will be 9 groups.

Step-by-step explanation:

There are 16 sixth graders and 20 seventh graders in the robotics club.

As we have to find the number of students that will be in each group if each group has the greatest possible numbers of club members, so we will find the HCF or highest common factor of 16 and 20.

16 = 2 x 2 x 2 x 2

20 = 2 x 2 x 5

HCF = 2 x 2 = 4

So, 16 sixth graders will be divided in [tex]\frac{16}{4}=4[/tex] groups

20 seventh graders will be in [tex]\frac{20}{4}=5[/tex] groups

total groups = [tex]4+5=9[/tex]

Hence, total there will be 9 groups with 4 students in each group.

A drawing of a garden uses a scale of 1 in 3 ft. Find the length of the drawing is 13 inches

Answers

So we know each inch is 3 feet.

1:3.

13:?

So we multiply 13 by 3 to get the answer!

13:39

or 39 feet!

I hope this helped! :))

The length of the original drawing will be 39 feet.

Given scale:

1 inch = 3 feet

Length of the drawing = 13 inches

What is a scale factor?

A scale factor is a factor by which the dimensions of an object are enlarged.

1 inch = 3 feet

So, 13 inches =13*3 feet

13 inches =39 feet

So, the length of the original drawing =39 feet.

Hence, the length of the original drawing will be 39 feet.

To get more about scale factors visit:

https://brainly.com/question/1903243

Amanda purchased a storage cube that has a volume of 4 cubic feet. She wants to put it on a bookshelf that is 12 inches tall. Will the cube fit? Explain

Answers

The answer is No, the cube will not fit because 4 cubic feet is 48 inches, and the bookshelf is only 12 inches, Therefore, the cube is basically larger than the bookshelf. Hope this helps and sorry I’m late.

4. FH bisects ∠GFI, m∠EFG = 4y + 8 and m∠HFI = 2y + 6. Find m∠EFH.


please help me solve this

Answers

Angle EFH is 134 degrees.

Answer:

m∠EFH=134

Step-by-step explanation:

FH bisects ∠GFI

So m<GFH=m<HFI

m∠EFG = 4y + 8 and m∠HFI = 2y + 6

m<GFH=2y+6

[tex]m<EFG+m<GF+m<HFI= 180[/tex] because its a linear pair

[tex]4y+8+2y+6+2y+6=180[/tex]

combine like terms and solve for y

[tex]8y+20=180[/tex]

Subtract 20 from both sides

[tex]8y=160[/tex]

Divide both sides by 8

y=20

m∠EFH=m<EFG+m<GFH

m∠EFH=[tex]4y+8+2y+6=6y+14=6(20)+14=134[/tex]

Eric biked 1 km 125 m on Monday. On Tuesday, he biked 375 m less than on Monday. How far did he bike both days

Answers

First, let's convert 1 km 125 m into metres.
1 km = 1000 m
1.125 km - 1,125 m

On Tuesday, Eric biked 375 metres fewer than on Monday.
1125 - 375 = 750 m
Eric biked 750 m on Tuesday.
On both days he biked 1125 + 750 = 1,875 m or
1 kilometre and 875 metres

Find the average of 27 and 45

Answers

Average is the total of the numbers divided by the amount of numbers.
[tex] \frac{27+45}{2} [/tex]
[tex] \frac{72}{2} [/tex]
36 is the answer.
The average of 27 and 45 is 36

There are 9 tennis balls in 3 cans. What is the rate of number of tennis balls to number of cans?

Answers

ivied the total number of tennis balls buy the number of cans to see how many tennis balls are in 1 can

9 divided by 3 = 3

 there are 3 tennis balls per can

 fraction would be 3/1  ( meaning 3 balls to 1 can)

Answer:

3/1

Step-by-step explanation:

I did the quiz and got it right

How can i do this problem? "The athletic department raised $14,500 to buy new football uniforms. If each uniform costs $258, how many uniforms can they buy? Explain how you interpreted the remainder."

Answers

14,500/258 is 56.2015504 blah blah blah. You can't have a fifth of a uniform. I would interpret it as they have a little money left over, but they can't buy another uniform.

So your answer is 56 uniforms.

Reflect across the y-axis, and then translate 8 units to the left. (-13, 1) (-14, -4) (-8, -8) (-9, -4)

Answers

Change the sign on each x value

Then

Add 8 to each x value

what is the vertex , x coordinates , and x intercepts of y=2x ^2 + 4x-30

Answers

5.1      Find the Vertex of   y = x2-2x-15

Parabolas have a highest or a lowest point called the Vertex .   Our parabola opens up and accordingly has a lowest point (AKA absolute minimum) .   We know this even before plotting  "y"  because the coefficient of the first term, 1 , is positive (greater than zero). 

 Each parabola has a vertical line of symmetry that passes through its vertex. Because of this symmetry, the line of symmetry would, for example, pass through the midpoint of the two  x -intercepts (roots or solutions) of the parabola. That is, if the parabola has indeed two real solutions. 

 Parabolas can model many real life situations, such as the height above ground, of an object thrown upward, after some period of time. The vertex of the parabola can provide us with information, such as the maximum height that object, thrown upwards, can reach. For this reason we want to be able to find the coordinates of the vertex. 

 For any parabola,Ax2+Bx+C,the  x -coordinate of the vertex is given by  -B/(2A) . In our case the  x  coordinate is   1.0000  

 Plugging into the parabola formula   1.0000  for  x  we can calculate the  y -coordinate : 
  y = 1.0 * 1.00 * 1.00 - 2.0 * 1.00 - 15.0
or   y = -16.000

Mark drew two lines that form a right angle. What word describes the lines mark drew

Answers

Perpendicular? Because the intersection forms right angles

Answer:

Perpendicular Lines

Step-by-step explanation:

perpendicular (perpendicularity) is the relationship between two lines which meet at a right angle (90 degrees).

1/3(9−6m)+1/4(12m−8)

Answers

Hello there!

They are asking you to simplify it. So, let me help you out..

[tex] \frac{1}{3}(9-6m)+ \frac{1}{4}(12m-8) Use the distributive property [/tex]
(1/3)(9) + (1/3)(-6m) + (1/4)(12m) + (1/4)(-8)
=3 - 2m + 3m - 2
= m + 1


Best of luck with your studies!

Answer:

M+1

Step-by-step explanation:

1. Write the ratio in the simplest form. 16:24 (1 point) 1:2 4:3 3:4 2:3

Answers

Any ratio can be simplified into its simplest form by dividing the numerator and denominator by the common factor.

The given ratio is 16:24. To bring the ratio in its simplest form we will look for the factors of 16 and 24 and look for the greatest number that divides both 16 and 24.

The  greatest number that divides both 16 and 24 is 8.

16÷8=2

24÷8=3.

The ratio 16:24 in its simplest form is 2:3

The solution for the ratio in the simplest form is, 2 : 3

Given that,

16:24 is the specified ratio.

Now, By finding the largest integer that divides both 16 and 24 and the factors of 16 and 24, we may reduce the ratio to its most basic form.

Hence, 8 splits both 16 and 24 to the maximum possible extent.

So, we get;

16 / 8 = 2

24 / 8 = 3

Thus, the simplest form of the fraction is,

⇒ 16 : 24

⇒ 16 / 24

⇒ 2 / 3

It can be written as,

⇒ 2 : 3

So, the simplest form is,

⇒ 2 : 3

Learn more about the ratio visit:

https://brainly.com/question/12024093

#SPJ6

Of video game that originally cost $25.99 is on sale for 50% off if you have $14 would you have enough money to buy the video game explain (estimate)

Answers

Just round 25.99 to 26 and divide it by two. This gives you 13, which is less than 14.. You would be able to buy the video game.

Final answer:

After calculating 50% of $25.99, which is approximately $13, we find that the estimated sale price of the video game is $13. Therefore, if the student has $14, they will have enough money to buy the discounted video game.

Explanation:

The student is asking whether $14 would be enough to purchase a video game that is on a 50% off sale from its original price of $25.99. To find the sale price, we can take 50% of the original price and subtract it from the original price itself.

First, calculate 50% of $25.99: (0.50) imes $25.99 = $12.995. Since we are estimating, round the 50% value to $13. Now, subtract that from the original price to get the sale price: $25.99 - $13 = $12.99 (rounded to $13 for easier calculation).

In this estimate, the sale price is $13, which means that if the student has $14, they would have enough money to buy the video game on sale because $14 is greater than $13. Therefore, they will have $1 left after the purchase.

what is 8.6x+2.2(2x-5)=54

Answers

[tex]8.6x+2.2(2x-5)=54\\\\8.6x+(2.2*2x)+[2.2*(-5)]=54\\\\8.6x+4.4x-11=54\\\\13x-11=54\\\\13x=65\\\\\\x=5[/tex]

Determine the independent variable (__________,y). what word goes in the blank space??

Answers

In the blank the answer is x axis

what is 0.6144 divided by 1.6

Answers

0.384 is the correct answer :3
The answer is 0.384 if divide correctly.

Hoped this helped : )

One carpet cleaning cost are shown in the table. The relationship is linear. Find and interpret the rate of change and the initial value for this situation.

Answers

I see from the given data that each additional carpet after the first costs $50 each to have cleaned.

The first costs $125.  Supposing we subtract $50 from that, we get $75.  So, it sounds like it costs $75 just to get the carpet cleaners to your house.

The rule would then be $75 + $50x, where x : {1, 2, 3, 4, .... }

Let's check this result.  Suppose x = 1.  Will the charge be $125, as show in the table?  $75 + $50(1) = $125.  Correct.

Suppose x = 4.  Will the charge be $275 as shown in the table?
   $75 + $50(4) = $275.  YES

Round to the place value of the underline digit 934,567 the underline digit is 4

Answers

4,600 is the place value or you can just say 4,000

Look at the following numbers:
HELP ASAP (ONE QUESTION)
− 4, −1, 0, 4

Which pair of numbers has a sum of 0?

4, −1
−4, 0
−1, 0
−4, 4

Answers

The answer is -4, 4.
Because -4 + 4 will become 0.



Answer:

−4, 4

Step-by-step explanation:

mississippi live streaming weather radio broadcast from NOAA weather stations gives local weather updates every 18 minutes. The first update is at 2:00pm. you turn on the radio on at 5:30pm. How long will you have to wait for the next weather update?

Answers

Since they give updates every 18 minutes, thus any time being a multiple of 18 after 2 pm will be the time they give update.

5:30 pm is 3 hours 30 minutes for 2 pm or 150 minutes from 2 pm.

In 150 minutes, there are eight 18 minutes that have passed and is remaining 6 minutes for the next multiple of 18.

Therefore, you have to wait for 6 minutes for the next weather update.
Note that 5:30pm is 3 hours and 30 minutes from 2:00pm. And 3 hours 30 minutes is equivalent to 3*60 + 30 = 210 minutes. Since the local weather updates every 18 minutes, we have to wait for multiples of 18 minutes for the next weather update. We can see that 18 goes into 210 eleven times with a remainder of 12. So we're 12 minutes pass the latest weather update at 5:00pm, meaning that we have to wait 6 minutes more for the next weather update.

Thus the answer is 6 minutes. 
Other Questions
Manny drove 45 miles in 0.75 hours. What was the average rate that he drove in miles per hour Social mobility that occurs over the course of an individual's lifetime is called ________ mobility Within ecosystems, high quality energy is constantly ____.a. being recycledb. becoming low quality energyc. being destroyedd. becoming mattere. being made Carmen is making 5 parts strawberry juice to 3 parts water. Carmen would like to make 64 fluid ounces of the strawberry drink. How many fluid ounces of strawberry juice and water does Carmen need? Evaluate explain which factor you think is most important in deciding whether stem-cell research should be legal and government-funded. Which of the following is a measurement of the space between two objects? A. Area B. Pounds C. Circumference D. Miles Which parts of this excerpt from Nathaniel Hawthornes novel The House of Seven Gables provide direct characterization? Had he been told of a bad air, it might have moved him somewhat; but he was ready to encounter an evil spirit on his own ground. Endowed with commonsense, as massive and hard as blocks of granite, fastened together by stern rigidity of purpose, as with iron clamps, he followed out his original design, probably without so much as imagining an objection to it. On the score of delicacy, or any scrupulousness which a finer sensibility might have taught him, the Colonel, like most of his breed and generation, was impenetrable. He therefore dug his cellar, and laid the deep foundations of his mansion, on the square of earth whence Matthew Maule, forty years before, had first swept away the fallen leaves. It was a curious, and, as some people thought, an ominous fact, that, very soon after the workmen began their operations, the spring of water, above mentioned, entirely lost the deliciousness of its pristine quality. Dr. Jenkins just completed an experiment. The variable that was measured in her experiment is referred to as the _____ variable. What is 100-305 value 14 The number of sides of a polygon that has n vertices is what? The Great Schism of 1054 was a split between Catholics in western Europe and A)Jews in eastern Europe. B)Muslims in the Middle East. C)Christians in eastern Europe and Asia. D)Protestant Christians in central Europe. What is the most common definition of a felony?a. a crime punishable in the statute by death or imprisonment in a state prison.b. any crime punishable by imprisonment in a jail or state prison.c. a crime punishable by grand jury indictment.d. any crime for which one can be impris? The planet mercury is roughly 2 over five the size of earth. Write down the fraction as a decimal The enlightenment and the american revolution were both major influences on the 19th-century uprisings in Find the value of the point on the number line.is it3/102/92/8or3/8please helpthank you so so so much Most founders' agreements include a ________ clause, which legally obligates the departing founder to sell to the remaining founders his or her interest in the firm if the remaining founders are interested. What is the value of x? A.35 B.60 C.155 D.25 Explain why the American heart association changed the ABCs of CPR to the CABs of CPR Which group seemed to see the most positive changes after the civil war? 1) blacks 2) democrats All sounds for speech vibrate at different frequencies, which is how you differentiate speech sounds. vowels are relatively low in pitch, while consonants such as l, m, and n are in the middle range of pitches. many speech sounds such as s and f are high in pitch. how would speech understanding be affected by a person with moderate to severe high frequency sensorineural hearing loss? Steam Workshop Downloader