A teacher gives students the following math problem to solve: (4.20 – 1) × 5.6

Jo solves the problem with a calculator.

Bella solves the problem without a calculator.

Which statements are true? Check all that apply.

Jo’s method is more efficient because there are multiple decimal operations to perform.
Bella’s method could be used if she wanted to use estimation to check the reasonableness of Jo’s calculations.
Jo’s method is more efficient because some of the calculations cannot be done quickly by hand.
Bella’s method is more efficient because calculators should never be used in school.
Bella and Jo can both get the right answer to the problem.

Answers

Answer 1
Answer: A, E
Explanation: with a simple math problem like this a calculator is going to be more efficient. This, however, can be done by hand so each way can get to the right answer
Answer 2

Answer:

It is 1,2,3, and 5. hope this helps! :)

Step-by-step explanation:


Related Questions

what is special about the y coordinate that goes with the x coordinate of 1 on a proportional graph

Answers

Answer and Step-by-step explanation:

There is a two-dimensional numbers line in a coordinate plane, which has a horizontal line x-axis, and the vertical line is known as the y-axis. These lines intersect each other at zero points, and they are perpendicular. Zero points are known as the origin. The axes divide the plane into  quadrants.

A point in the coordinate plane is of the form of (x, y). This point is named as ordered pair; the first number is from the x coordinate, and the second number from the y coordinate.

To make a graph, we draw a dot, starting from the origin, at the coordinate that communicates to the ordered pair. The y coordinates describe how many steps to move up or down ( positive or negative), and x coordinates tell us to move right or left ( positive or negative).

The completeness property for points describes:

Exactly one point in the plane given  the number of ordered pair

And

Exactly one ordered pair of numbers at a given point in the plane.

A relation is ordered pairs; the x coordinates are known as domain, and the y coordinate is known as the range.

The domain contains the value that corresponds to the independent variable and the range equal to the dependent variable.

what is the local minimum on a graph

Answers

Answer:

if the function goes from decreasing to increasing,

Step-by-step explanation:

Which expression is equivalent to 3m+1-m?
A-2+m-1+m
B-1+m
C-3m-1
D-3m

Answers

Answer:

A

Step-by-step explanation:

Answer:

option  (a) is correct.

2 + m - 1 + m is an equivalent expression  to the given expression  3m+1-m

Step-by-step explanation:

Given expression  3m+1-m

We have to choose an equivalent expression from given options.

Equivalent expression are those expression that looks different but are same.

Like 4+2 = 6  and 3+ 3 = 6

Both have same value but looks differently.

Like terms are term having same variable with same degree.

Consider the given expression  3m+1-m

Simplify by adding like terms,

3m + 1 - m = (3-1) m + 1

Thus, (3-1) m + 1  = 2m + 1

Also 2m + 1 can be written as m + m + 2 - 1

Thus, option  (a) is correct.

To make Diane's special punch it take 4 cups of juice for every 7 cups of Lime soda. How much juice will be needed if we have 21 cups of soda? Using J for juice and S for soda, how will the equation look?

Answers

Answer:

Step-by-step explanation:

4 cups of J for every 7 cups of soda  4:7

21 cups of soda will take 12 cups of J

If you take the 7 and multiply by 3 you get the 21.

So you will need to multiply the 4 by the 3 to get the 12. You need to keep everything in proportion.

4:7   same as 12:21

How can I figure out my screentime password.
100 points to whoever can tell me exactly how to do it and maybe even brainless if it works and it has to be an actual answer not just a random one!!!

Answers

Answer:

Screen record as your parent puts the password in or wipe off your screen and give the parent your phone to put the password in then look at the fingerprint circles and that where each number is, then try all the possible combinations

Step-by-step explanation:

60 = 5(1.07)^x

initial value:

a. 7%

b. 1.07%

c. 9.3%

d. 5

e. 60


growth or decay?


growth/decay rate?

a. 7%

b. 1.07%

c. 9.3%

d. 5

e. 60

Answers

Given:

The given equation is

[tex]60=5(1.07)^x[/tex]

To find:

The initial value and growth/decay factor.

Solution:

The general exponential growth/decay model is

[tex]y=a(1+r)^x[/tex]     ...(i)

where, a is initial value, if r>0, then |r| is growth factor, if r<0, then |r| is decay factor and x is time.

We have,

[tex]60=5(1.07)^x[/tex]

It can be written as

[tex]60=5(1+0.07)^x[/tex]        ...(ii)

On comparing (i) and (ii), we get

[tex]a=5\text{ and }r=0.07[/tex]

Here, initial value is 5 and growth factor is 0.07, i.e., 7%.

Therefore, the correct option for first question is d and correct option for second question is a.

Answer:

see image

Step-by-step explanation:

Plato/Edmentum

LCM of 9 18 and 99 is :

Answers

Step-by-step explanation:

[tex]\begin{array}{c|ccc}\cline {2-4} 2 & 9 ,& 18 ,& 99 \\ \cline {2-4} 3 & 9 & ,9 & ,11 \\ \cline {2-4} 3 & 3 ,& 3, & 11 \\ & 1, & 1 , & 11 \end {array}[/tex]

LCM=2×3×3×11=198

Every year, the value of a property in singapore appreciates by 15% of its value in the previous year. If the value of the property was $899300 in 2012, find ite value in 2010.

Answers

Answer:

629 510$

Step-by-step explanation:

$899300 - (30% of $899300)

cuz its two years away from 2010 so it will have gone up 30 % so to rewind time, just go back 30%

Answer:

649744.25

Step-by-step explanation:

899300-15%-15%=649744.25

Simplify fully 56:16

Answers

Answer:

7/2

Step-by-step explanation:

El 5% de los focos producidos por una fabrica son defectuosos. Al extraer una muestra de 6 focos. ¿Cual es la probabilidad de que menos de 3 focos sean defectuosos?​

Answers

Answer:

3/10 no estoy segura pero creo que es esto

12.
Name the coefficients in the expression 4x + 9- y.
9
O
4,9,0
0
4, -1
OR

Answers

Answer:

4, 9, and -1

Step-by-step explanation:

Please give me brainliest

Answer:

4x+9-y

The 4 is your coefficient. X and Y are your variables and 9 is your constant.

Question 16
Mr. Twain asked the students in his class to draw the figure below using a scale factor of 3. Then, he asked students to tell him one of the new side lengths of the figure. Some student responses are below.


Student Response
Mark 5 in.
Samantha 6 in.
Divia 1.3 in.
Cheng 0.9 in.
Candice 11.7 in.
Select the student that answered Mr. Twain's question correctly.
A
Mark

B
Divia

C
Cheng

D
Candice

Answers

Answer:

C

Step-by-step explanation:

Your answer is C because got the question right when put C  .

6.58+7.64-10.006 adding and subtracting decimals

Answers

Answer:

4.214

Step-by-step explanation:

Original Equation:

6.58 + 7.64 - 10.006

Add 6.58 to 7.64

14.22

Subtract 10.006 from 14.22

4.214

Hope this helps :)

Please consider Brainliest :)

DUE BY 3:30
For the following figure , the value of x is

Answers

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[tex]x = 8 \: \: in[/tex]

[tex]y = 8 \sqrt{2} \: \: \: in[/tex]

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What is the probability that a random sample of 400 U.S. youth will provide a sample proportion (p¯) that is within 0.03 of the population proportion (p)?

Answers

Complete Question

The proportion of adult women in the United States is 51% (p=0.51).What is the probability that a random sample of 400 U.S. youth will provide a sample proportion (p¯) that is within 0.03 of the population proportion (p)?

Answer:

The probability is  [tex]P( 0.48 < p < 0.54 ) = 0.77[/tex]  or  [tex]P( 0.48 < p < 0.54 ) = 77\%[/tex]

Step-by-step explanation:

From the question we are told that

   The sample size is  n  =  400

    The population proportion is  p = 0.51

Generally the standard deviation of this sampling distribution is mathematically represented as

          [tex]\sigma = \sqrt{\frac{p(1-p)}{n} }[/tex]

=>      [tex]\sigma = \sqrt{\frac{0.51(1-0.51)}{400} }[/tex]

=>      [tex]\sigma = 0.02499[/tex]

Generally the lower limit for the range of the population proportion within 0.03 is

    [tex]a = p - 0.03[/tex]

=>[tex]a = 0.51 - 0.03[/tex]

=>[tex]a = 0.48[/tex]

Generally the  upper  limit for the range of the population proportion within 0.03 is

    [tex]b = p + 0.03[/tex]

=>[tex]a = 0.51 + 0.03[/tex]

=>[tex]a = 0.54[/tex]

Generally the  probability that a random sample of 400 U.S. youth will provide a sample proportion (p¯) that is within 0.03 of the population proportion (p) is mathematically represented as

     [tex]P( a < p < b) = P( \frac{a - p }{\sigma } < \frac{\^ p - p }{\sigma} < \frac{b - p}{\sigma } )[/tex]

=>   [tex]P( 0.48 < p < 0.54 ) = P( \frac{0.48 - 0.51 }{0.02499 } < \frac{\^ p - p }{\sigma} < \frac{0.54 - 0.51}{0.02499 } )[/tex]

[tex]\frac{\^ p -p }{\sigma }  =  Z (The  \ standardized \  value\  of \  \^ p )[/tex]

=>   [tex]P( 0.48 < p < 0.54 ) = P( -1.2 < Z < 1.2 )[/tex]

=>   [tex]P( 0.48 < p < 0.54 ) = P( Z < 1.2) - P(Z < -1.2 )[/tex]

From the z table  the area under the normal curve to the left corresponding to  1.2 and  -1.2  is

     [tex]P( Z < 1.2) =0.88493[/tex]

and  

    [tex]P( Z < -1.2) =0.11507[/tex]

So

   [tex]P( 0.48 < p < 0.54 ) = 0.88493 - 0.11507[/tex]

=>  [tex]P( 0.48 < p < 0.54 ) = 0.77[/tex]

(Round to the nearest tenth of a percent.) In 2011, the IRS increased the deductible mileage cost to

55.5 cents from 51 cents.

Answers

Answer:

[tex]\%Change = 8.8\%[/tex]

Step-by-step explanation:

Given

[tex]Initial = 51\ cents[/tex]

[tex]Final = 55.5\ cents[/tex]

Required

Determine the percentage change

Percentage change is calculated as;

[tex]\%Change = \frac{Final - Initial}{Initial} * 100\%[/tex]

[tex]\%Change = \frac{55.5 - 51 }{51 } * 100\%[/tex]

[tex]\%Change = \frac{4.5}{51} * 100\%[/tex]

[tex]\%Change = \frac{4.5* 100\%}{51}[/tex]

[tex]\%Change = \frac{450\%}{51}[/tex]

[tex]\%Change = 8.8\%[/tex]

Hence, the percentage change is approximately 8.8%

A triangle has sides that measure 5 units, 7 units, and 8 units. Is this a right triangle

Answers

Answer:

No

Step-by-step explanation:

Using the given lengths if we say this is a right triangle then 8 would be length of hypotenuse

From the Pythagorean theorem 

8^2 = 5^2 + 7^2

64 = 25 + 49

64 = 74 is not a correct equation so the triangle is not a right triangle for the given lengths

Let A = (1,2,3,4) and B= (0,1) use the set roster notation,to work each of the following sets and indicate the number of elements that are in each set?

a.A x B
b. bx A
c.A x A
d.B x B

Answers

Step-by-step explanation:

A={1,2,3,4}

B={0,1}

now,

a. A×B={1,2,3,4}×{0,1}

={(1,0)(1,1)(2,0)(2,1)(3,0)(3,1)(4,0)(4,1)}

b. B×A={(0,1)(0,2)(0,3)(0,4)(1,1)(1,2)(1,3)(1,4)}

c. A×A={(1,1)(1,2)(1,3)(1,4)(2,1)(2,2)(2,3)(2,4)(3,1)(3,2)(3,3)(3,4)(4,1)(4,2)(4,3)(4,4)}

d. B×B={(0,0)(0,1)(1,0)(1,1)}

hope it help u..

A parent volunteer group is raising money by making custom hats to sell at

school activities. They plan to sell the hats for $12. Each hat costs $6 to

make. They spent $50 for advertising.

Use n to represent the number of hats they sell. Multiply this by the money

they make for each hat, then subtract the advertising cost.

Which expression represents the money that the group raises?

A. 12n - 6 - 50

O B. 50 - (12 – 6) n

O C. (12 - 6)n - 50

O D. 12 - 6n - 50

Answers

Answer:

B

Step-by-step explanation:

The answer is B because you minus 50 from 12 and 6.

Dilate a square with vertices (0,0). (0,4). (4,4), and (4,0) using the scale factor k=0.5. What is the value of the ratio (new to original) of the
perimeters? the areas?
The ratio of the perimeters is
The ratio of the areas is

Answers

Perimeter: 1\2

Area: 1\4

what is the quotient of 8,187 divided by 24

Answers

Answer:

341.125

Step-by-step explanation:

Hope this helped, Have a Great Day!!

9.5 +5² - 2² (-3)rasied to the 2nd power

Answers

-1.5 dndekekckcl fkckkcekekxk k

Abigail has $400 in her savings account. She wants to keep at least $160 in the account.
She withdraws $40 each week for food. Write and solve an inequality to show how many
weeks she can make withdrawals from her account.

Answers

Answer:

400-40x x=6

Step-by-step explanation:

400 in total. minus 40 each week (x)

40 × 6= 240

400-240=160

Without actually going through the solution process. we can say that the equation
|5x-6| =6x cannot have a negative solution. Why is this true?

Answers

This is true because if you are finding the absolute value of a number, you are finding the number’s value, or distance from zero, regardless of its sign.

A positive number divided by a positive number is positive and the sum of two positive numbers is positive, thus the solution would have to be positive.

A dog that weighs 14 pounds should eat 1 5/8 cups of a certain type of dog food per day. How much of the same type of dog food should be fed, per day, to a dog who weighs 26 pounds?
PLEASE HELP!!!!!!!!

Answers

1 5/8 = 13/8
(13/8)/14 = .116 or 13/112
.116 (26) = 3.016 or 169/56

9514 1404 393

Answer:

  3 1/56 cups

Step-by-step explanation:

Apparently, you're to assume that the amount of food is supposed to be proportional to weight. If x is the amount of food for the 26-pound dog, then ...

  cups/weight = (1 5/8)/14 = x/26

Multiplying by 26 we have ...

  x = (26)(13/8)/14 = 338/112 . . . cups

  x = 3 1/56 cups ≈ 3.02 cups

About 3.02 cups of the same type of food should be fed to a 26-pound dog.

A coordinate plane with 2 lines. The first line is labeled y equals f(x) and passes through (0, 4) and (1, 1) The second line is labeled y - g(x) and is horizontal passing through (negative 2, 2), (0, 2), and (2, 2). The lines intersect at a point that is slightly to the right of (0.5, 2).
If f(x) = −3x + 4 and g(x) = 2, solve for the value of x for which f(x) = g(x) is true.

x = ______

Answers

Answer:

2/3

Step-by-step explanation:

cuz it is

Answer:

2/3

Step-by-step explanation:

Can someone help me with these three math problems pleaseeeeeeeeeee

Answers

1. 75
2. 63
3. i have no clue

all triangles should add up to 180, so if you add the numbers up that you have you take ur answer and subtract 180 to get what the missing angle equals! sorry hope that helps a little lol

Answer:

75 should be the answer

A bakery bakes 68 batches of 56 cupcakes each week. How many individual cupcakes do they make each week?

Answers

Answer:

3808

Step-by-step explanation:

Which decimal makes the comparison true? 7.68 > ______ a. 8.81 b. 8.68 c. 7.86 d. 7.56

Answers

Answer:

D. 7.56

Step-by-step explanation:

First we can see it has a less than symbol meaning whatever we put has to be less than the first number.

So the only number less than 7.68 is 7.65!

Answer:

D

Step-by-step explanation:

The number we're dealing with is 7.68.

the symbol means that whatever number comes after it is less than 7.68. So, we look at the other numbers to see if they're bigger than 7.68.

8.81 is bigger than 7.68.

8.68 is bigger than 7.68.

7.86 is bigger than 7.68.

7.56 is smaller than 7.68.

Find the maximum value and the minimum value of the function and the values of x and y for which they occur.
P 19x-5y60, subject to 5x + 9ys 45, 0 s ys4, and 0sx < 6 and y
The maximum value occurs where x =_______ and y occurs where x_________
The minimum value (Do not round until the final answer. Then round to two decimal places as needed.)

Answers

Answer:

i have autism and adhd and add and dmdd so plz dont yell at me that i did not answer it!!!

Step-by-step explanation:

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