Find the errors and correct the following mathematical sentences.​

Answer:

1 1/2

Step-by-step explanation:

Answer:

METHOD 1:

5x+7(x+1)=5x-21

5x+7x+7=5x-21

12x+7=5x-21

12x-5x=-21-7

7x=-28

x=28/7

x=4

METHOD 2:

5x+7(x+1)=5x-21

5x+7(x+1)=5x-21-5x

7(x+1)=-21

7x+7=-21

7x=-28

x=4

Step-by-step explanation:

METHOD 1:

5x+7(x+1)=5x-21

5x+7x+7=5x-21

12x+7=5x-21

12x-5x=-21-7

7x=-28

x=28/7

x=4

METHOD 2:

5x+7(x+1)=5x-21

5x+7(x+1)=5x-21-5x

7(x+1)=-21

7x+7=-21

7x=-28

x=4

three shapes. three areas to find. three areas to add together to find the whole area. gotcha.

Step-by-step explanation:

length is 7 cm and width is 4 cm, so the area is 28 square cm

width is 4 cm and length is 10 cm, so the area is 40 square cm

Because the weird shape's bottom length was 13 cm. There are 3 cm and 7 cm on the top length(s) of the weird shape, next to each other. Looking at the dash lines, when adding 3 cm and 7 cm together, the larger rectangle's length is 10 cm.

base is 3 cm and height is 8 cm, so the area is (3x8)/2 = 24/2 = 12 square cm

With knowledge from figuring out the larger rectangle's length being 10 cm and the weird shape's bottom length being 13 cm, we know the right triangle's base is 3 cm. (13 cm - 10 cm = 3 cm for the base of the right triangle).

Due to adding 4 cm and 4 cm of weird shape's width, which is also a right triangle's height.

28 + 40 + 12

= 80 square cm (ANSWER)

Answer:

4 is the length

5 is the width

3 is the height

60 cubes

60m is the volume

Answer:

80

Step-by-step explanation:

The sum of the opposite inscribed angles is 180

x+100 = 180

X = 80

Answer:

Step-by-step explanation:

5) 2y - 2

6) 5x - 8

8) 14x - 21

9) -2x + 2 OR 2 - 2x

10) 13x + 4

11) -12 + x OR x - 12

Hope that helps!

Answer:

5.33333333333

Step-by-step explanation:

2/3= 0.66666666666

0.66666666666 x 8= 5.33333333333

:)

Answer:

10

Step-by-step explanation:

Answer:

5*2/5= 10*1/5

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

Answer:

[tex]C" = (4,3)[/tex]

Step-by-step explanation:

Given

[tex]C = (3,-4)[/tex]

Transformation 1: y = -x reflection

Transformation 2: x axis reflection

Required

The new coordinates of C

[tex]C = (3,-4)[/tex]

Transformation 1: y = -x reflection

This gives: (-y,-x)

So:

[tex]C = (3,-4)[/tex]

[tex]C' = (4,-3)[/tex]

[tex]C' = (4,-3)[/tex]

Transformation 2: x axis reflection

This gives: (x,-y)

So:

[tex]C' = (4,-3)[/tex]

[tex]C" = (4,3)[/tex]

Answer:

B?

Step-by-step explanation:

I think is B because solar power never run out.

（For the next 5000000000 years at least...）

Answer: x=1.6

Step-by-step explanation:

1.1=-8.5+6x

+8.5 +8.5 (add 8.5 on each side)

9.9=6x

Divide by 6 on each side to leave the x by itself

x=1.6

Answer:

x= 1.6

Step-by-step explanation:.

1.1=−8.5+6x

Step 1: Simplify both sides of the equation.

1.1=6x−8.5

Step 2: Flip the equation.

6x−8.5=1.1

Step 3: Add 8.5 to both sides.

6x−8.5+8.5=1.1+8.5

6x=9.6

Step 4: Divide both sides by 6.

6x /6 =  9.6/ 6

x=1.6

Answer:

x=1.6

Answer:

The average weight beyond which the elevator would be considered overloaded is 183 lbs.

Step-by-step explanation:

Weight in excess of 6222 lbs means that the elevator is overload.

With 34 men:

Average weight greater than:

6222/34 = 183 lbs

The average weight beyond which the elevator would be considered overloaded is 183 lbs.

Answer:

Side of the rhombus is 12 cm. Let d1 = 2x cm , so d2 = 2x+6 cm

Now, 12^2 = x^2 + (x+3)^2 = 2x^2 + 6x+9 = 144, or

2x^2 + 6x-135=0, or

x^2+3x-67.5 = 0

x1 = [-3 +(9+270)^0.5]/2

= [-3+279^0.5]/2

= [-3+16.70329309]/2 = 6.851646544 cm [x2 will be negative and so inadmissible]

So d1 = 2x6.851646544 = 13.70329309 cm and d2 = 19.70329309 cm.

So the area of the rhombus is 13.70329309x19.70329309/2 = 135 sq cm.

Answer:

Estimate = 600,000

Step-by-step explanation:

An estimate can be defined as a rough calculation of a numerical value, usually the upper limitation.

Given the following numerical values;

212,514

396,705

To add the two values together, we would first of all determine the estimate.

Estimate of 212,514 = 200,000

Estimate of 396,705 = 400,000

Adding the two values;

200,000 + 400,000 = 600,000.

Actual addition of the values would have given;

212,514 + 396,705 = 609,219.

Therefore, 600,000 is an estimated value of 609,219.

Answer:

3600

Step-by-step explanation:

17100 in a total of 114 hrs (24*4+18)

Find it hourly

17100/114=150

Then, multiply by 24 to get the amount it consumers in the day.

150*24=3600

Answer:

first multiply 4 with 18

then divide the answer with 17100

So,

4x18=72

17100 /by 72=237.5

It uses 237.5 watts per day

Checking= 237.5x72=17100

So it is true.

Step-by-step explanation:

Answer:Big Chungus

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

4^3=4*4*4

4*4=16*4=64

Answer:

x=0.5 / ½

the error in lin solution is on the second line

which is 2x(4-17).it suppose to be 8x-34x.

I think this is the answer and also the mistake was that Lin forgot to add the negative symbol after solving the equation when he did 2x (4-17)

Answer: because the figure on the left is negative and more wide open while the other one is not only smaller but also positive and it’s more shut

Step-by-step explanation:

So the X-axis of the Figure on the left is going form point -3 to 0 while the other figure on the right is going form 3 to 5. And the Y- axis of the figure on the left is 2 while the right is 1 which proves that the figure on the left is bigger then the other

Your Also supposed to add all the point like first look for the Y and the X of I with J Then look for H and K then look for G and L the look for the slope of all those and then add them,then do the same with the left one and see which ones more and how much more

Answer:

The gain percent made by shopkeeper is 10.5%.

Step-by-step explanation:

Given:

Price at which goods are marked = 30%

Discount on the marked price = 15%

To Find:

Gain percentage of the shopkeeper

Solution:

Let the cost price of the product be = 100

Therefore,

MP = 30 + 100 = 130

Since discount is 15%. thus -

Discount = 15/100 x 130

= 19.5

Selling price = MP - Discount

SP = 130 - 19.5

= 110.5

Profit = SP - CP

= 110.5 - 100

= 10.5

Calculating the gain%

Gain% = 10.5/100 x 100

= 10.5

Answer: The gain percent made by shopkeeper is 10.5%.

Answer:

Step-by-step explanation:

975/13=75

75 calories per brownie

Answer:

yes.

simply subtract the coupons from the total.

56.12-9.85= $46.30

Answer:

C

Step-by-step explanation:

I did it already its c and also its the right answer

Answer:

35

Step-by-step explanation:

free points for me

Answer:

35- Yw Lovie <3

Step-by-step explanation:

Answer:

180 cm^2

Step-by-step explanation:

(8 x 15)/2 = 60 cm^2

(16 x 15)/ 2 = 120 cm^2

120 + 60 = 180 cm^2

She bought $27.40 worth of roast beef.

Answer:

8cm

Step-by-step explanation:

Formula

l=2rsintita/2

l=2*8sin60/2

l=16sin30

l=8cm

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