Mathematics Middle School

to find 36+29+14 Joshua rewrote the expression as 36+14+29 what property did Joshua use

Answers

Answer 1
He used commutative property
Answer 2
Joshua here would want to use commutative property, I believe. Forgive me if I'm wrong.

Related Questions

without dividing or listing multiples how can you tell if 61 is a multiple of 6

Answers

It's not even. And every multiple if 6 is even.
It isn't even it is odd

How do I show work for 5- (a-4) = 3 (a+2)

Answers

Here is how I would show the work for this problem

5- (a-4) = 3 (a+2)
5-a+4 = 3*a+3*2
5-a+4 = 3a+6
-a+9 = 3a+6
-a+9+a = 3a+6+a
9 = 4a+6
9-6 = 4a+6-6
3 = 4a
4a = 3
4a/4 = 3/4
a = 3/4

So the solution is the fraction a = 3/4 (in decimal form 0.75)

Let me know if you have any questions or issues with any of the steps shown above. It's a lot to take in so feel free to ask about anything really. 
5-(a-4)=3+(a+2)
distribute invible -1
5-a+4=4+a+1
9-a=a+5
add a to both sides
9=2a+5
minus 5 both sides
4=2a
divide by 2 both sides
2=a

Liang went to the bookstore. he spent 1/3 of his ,oney on a pen and 4/7 of it on books. what fraction of his money did he have left?

Answers

He had 2/21 of his money left

when a number x is multiplied by 4 the result is 2/5 what is the vaule of x

Answers

2/5 as a decimal is 0.4 
4*0.1=0.4 
meaning x is 0.1
4x=2/5
x=(2/5)/4
x=(2/5)/(4/1)
x=2/5*1/4
x=2/20
x=1/10
x=0.1

Hope this helps :)

Ellen walks dogs on weekends she gets paid $ 8.50 per hour each day she works 5 hours and 45 minutes does she earn more or less than $85 in one weekend? how much more or less explain.

Answers

$8.50 * 5 = $42.50
45 mins -> $8.50 / 60 * 45 = $6.37

She will earn less than $84 in one weekend because $42.50 + $6.37 = $48.87

Answer:

Ellen earns $159.375 more than $85.

Step-by-step explanation:

We have been given that Ellen walks dogs on weekends she gets paid $ 8.50 per hour. Each day she works 5 hours and 45 minutes.

[tex]\text{45 minutes}=\frac{45}{60}\text{ hour}[/tex]

[tex]\text{45 minutes}=0.75\text{ hour}[/tex]

We know that each week has 5 working days.

[tex]\text{Hours worked each week}=5\times 5.75\text{ hours}[/tex]

[tex]\text{Hours worked each week}=28.75\text{ hours}[/tex]

[tex]\text{Earnings each week}=\$8.50\times 28.75[/tex]

[tex]\text{Earnings each week}=\$244.375[/tex]

Since $244.375 is greater than $85, therefore, Ellen earns $159.375 more than $85.

what is the least common multiple of 5 and 10

Answers

The least common multiple of 5 and 10 is 5. I hope this helps you.
To find out what the LCM is, list the multiples of each number:

5, 10, 15 ...
10, 20, 30...

The number that is not only common but also is a multiple of both 5 and 10 would be 10.

512+270 is the same as 500 + ______

Answers

is the same as 500 plus 282

If x = 15 units, y = 18 units, z = 9 units, and h = 12 units, then what is the surface area of the triangular prism shown above?
A. 432 units2 B. 972 units2 C. 864 units2 D. 648 units2


Answers

15*9=135+135=270
18*12=216+216=432
9*18=162
270+432+162=864

C.864 is the answer

The surface area of a triangular prism is 648 square units.

What is the surface area of a triangular prism?

The surface area of a triangular prism is

= (perimeter of the base triangle × length) + (2 × base area of the triangle)

Given, the area of the base triangle is

= (1/2) × y × h square units

= (1/2) × 18 × 12 square units

= (1/2) × 216 square units

The perimeter of the base triangle is

= (x + x + y) units

= (15 + 15 + 18) units

= 48 units

Length = z = 9 units

Therefore, the surface area of the triangular prism is

= [(48 × 9) + 2 × (1/2) × 216] square units

= 648 square units

Learn more about the surface area of the triangular prism here: https://brainly.com/question/23137171

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What is 9/4 divided by 3/4 and make a model to support it

Answers

The answer would be 3/1. Hope that helps.

(7/8+1/12)- 1/2=
please help me with this

Answers

0.45833333333 this is the answer i think and sorry if it is the wrong one

Find the percent change from the first value to the second.

Answers

25%

Or 69 is 75% of 92

True or False: 5a + 6b = 11ab? Can you think of a way you can prove it using a and b?

Answers

False unless they are either both 1 or both 0.
11ab=11(a+b) not 5a+6b

Hope this helps :)

Writing. To. Explain Lola. Does. Dog. Sitting. For. 18hours. Per. Week. In the summer. About how much. Is her. Hourly. Rate. If she earns. $205.50. Per. Week

Answers

Her hourly rate would be $11.42
205.50 divided by 7 is 11.42

Which is the most reasonable estimate for 23.63 \ 6

Answers

4.

23.63 can be rounded to 24

24/6 is 4

the most reasonable answer for 23.63 divided by 6 is 3.94.

A number divided by 3.Then 14 is added to the quotient. The result is 33.What is the original number? I did x/3 + 14 = 33. Then i multiplied the 3 on both sides but didn't get the right answer .Help!!

Answers

i think the original number is 19

Answer:57


Step-by-step explanation: If you do in calculator 57÷3+14 it equals 33


what is the square root of 92/207

Answers

.6666666666. Because you divide 92 and 207.

Find two estimates for 4,396 divided by 4 by rounding the dividend to the nearest hundred and also to the nearest thousand. Compare the estimates.

Answers

About 1,349, and about 1,350, they are very close.

Answer:

The estimates are 1100 and 1000. Comparing both value you will realize the first estimate is the nearest hundred while the second estimate is the nearest thousand.

Step-by-step explanation:

The dividend of the expression  4,396 divided by 4 is 4396. The question enunciated we round up the dividend to the nearest hundred and thousand before estimating the expression.

4396 to the nearest hundred is 4400. The nearest hundred of 396 is 400.

4396 to the nearest thousand is 4000.

Now, let's do the estimate

4400/4 and 4000/4

1100 and 1000.

The estimates are 1100 and 1000. Comparing both value you will realize the first estimate is the nearest hundred while the second estimate is the nearest thousand.

What does a variable mean in an addition expression

Answers

In addition or subtraction, a variable represents an unknown number.

Example(s):
1. 20 - x = 17; the variable is 'x'
2. 5 + d = 25; the variable is 'd'

Therefore, you can use any letter to represent a variable. If you don't know what the unknown number is, just pretend that the variable is either a 1 or 0.

4x7x25=find the product tell which strategy used

Answers

700 would be the answer
Since it is just multiplication, you just multiply the numbers in any order.
For example:
1. 4x7=28x25=700
2. 25x4=100×7= 700
325 × 7= 175 x 4= 700

what is 4c squared + 6c - 3c squared - 2c -3

Answers

Your answer to your problem is c squared + 4c -3.
4c^2 + 6c - 3c^2 - 2c - 3

Answer: c^2 + 4c - 3

What is 4.973 written in expanded form

Answers

4 + 0.9 + 0.07 + 0.003
That is the answer! :)
PLEASE give me a thanks and the BRAINIEST ANSWER/CROWN! :) :D 
HAVE A GREAT DAY! :D :)
4+.900+0.07+0.003 I think hope it helps

Which linear inequality is represented by the graph?

Answers

for this one, all you have to do is test out those points and see if you get a valid answer!! it's easier than it looks.

y < 0.5x + 2

then, you can either find these points on your graph to check them (easier for most), but some people prefer the other method which is just taking your answer choices and plugging them in:
(-3, -2)
-2 < 0.5(-3) + 2
-2 < -1.5 + 2
-2 < 0.5
then, you just ask yourself "is that true?" is -2 less than 0.5? and the answer is yes, that's true, so this point is a solution.

the same process repeats with the rest of them, but:
(-3, 2) is a solution.
(-2, 1) is not a solution.
(-1, -2) is a solution.
(-1, 2) is not a solution.
(1, 2) is a solution.
(1, -2) is not a solution.
(1, 2) is a solution.

Answer:

The correct options are 1, 3, 5 and 6.

Step-by-step explanation:

The given inequality is

[tex]y<0.5x+2[/tex]

A point is the solution of a linear inequality, if it satisfy the inequality.

The given point is (-3,-2). Check whether this is a solution or not.

[tex](-2)<0.5(-3)+2[/tex]

[tex]-2<0.5[/tex]

This statement is true. Therefore (-3,-2) is a solution.

The given point is (-2,1). Check whether this is a solution or not.

[tex](1)<0.5(-2)+2[/tex]

[tex]1<1[/tex]

This statement is false. Therefore (-2,1) is not a solution.

The given point is (-1,-2). Check whether this is a solution or not.

[tex](-2)<0.5(-1)+2[/tex]

[tex]-2<1.5[/tex]

This statement is true. Therefore (-1,-2) is a solution.

The given point is (-1,2). Check whether this is a solution or not.

[tex](2)<0.5(-1)+2[/tex]

[tex]2<1.5[/tex]

This statement is false. Therefore (-1,2) is not a solution.

The given point is (1,-2). Check whether this is a solution or not.

[tex](-2)<0.5(1)+2[/tex]

[tex]-2<2.5[/tex]

This statement is true. Therefore (1,-2) is a solution.

The given point is (1,2). Check whether this is a solution or not.

[tex](2)<0.5(1)+2[/tex]

[tex]2<2.5[/tex]

This statement is true. Therefore (1,2) is a solution.

Thus the correct options are 1, 3, 5 and 6.

What are the slope and y-intercept for the the graph of y - 7x = 10

Answers

y-7x=10
y-7x=10
y=10+7x
y=10+7x, x€r
The finished equation should be y=7x+10

Therefore the slope is 7x and the y-intercept is 10

Jeanette ' s sister charges $5.50 per hour before 9:00 P.M for babysitting and $8 per hour after 9:00 P.M .She finished babysitting at 11:00 P.M and earned $38 . At what time did she begin babysitting ?

Answers

9:00-11:00 she earned $16. 38-16=22 22/5.50=4 9 minus four equals 5, so she started babysitting at 5:00.

What is 0.003 one tenth of ?

Answers

0.003 is one tenth of .03
0.03 is the correct answer

Solve the perimeter formula for an isosceles triangle, p=2a+b, solve for b.

Answers

minus 2a from both sides
p-2a=b

Answer:

b= (p)/(2a)

Step-by-step explanation:

what percent of 2000 is 204

Answers

204 is 10.2% of 2000

Working Out 

204/2000 x 100 = 10.2%

60% of what number is 360? 10% of what number is 30?

Answers

.6X=360
X=600

.3X=30
X=100
60% of 600 is 360.
      360/.60=600
            check: 0.60*600=360

do the same to get this answer, simply change to the different numbers.
10% of 300 is 30.

Hope this helps!

Television Videl watched 6 times as many hours of television over the weekend as Dineen. Together they watched a total of 14 hours of television. How many hours of television did each person watch over the weekend

Answers

We can make this into an equation. 6 times as many means Videl watched 6 times as many as Dineen, and Dineen watched x hours.
Thus, 6x+x=14. Isolate and solve for x.
7x=14
Divide by 7 on both sides.
x=2.
Videl watched 6*2 hours, or 12 hours of TV.
Dinnen watched 2 hours of TV.

The number of hours of television that they both watched will be 2 hours and 12 hours respectively.

Let the number of hours used by Dineen be x.

Therefore, the number of hours that Videl watched will be 6 × x = 6x

Therefore, based on the information given, the number of hours of television watched will be:

6x + x = 14.

7x = 14.

x = 14/7 = 2 hours.

Therefore, 6x = 6 × 2 = 12 hours

Learn more about division on:

https://brainly.com/question/885563

if a 14 karat gold necklace weighs 1.8 ounces how many ounces of pure gold does it contain

Answers

it contains three 3 pure gold
Three 3 pure gold (: hope this helps
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