MATHEMATICS MIDDLE SCHOOL

Kayleigh solved the equation 24 = c/12 as shown. What error did she make? Correct her work.Kayleigh work:
24 = c/12
C/12 = 24
12 (c/12) = 24/12
C = 2

Answers

Answer 1
Answer:

Answer:

The student multiplied by 12  on the left and divided by 12 on the right

Step-by-step explanation:

24 = c/12

We can rearrange the and flip the left and right side

c/12 =24

Multiply both sides by 12

12* (c/12) = 24*12

c = 288  

The student multiplied by 12  on the left and divided by 12 on the right

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The mean of a set of data is 45 years. Find the missing numbers in the data set {40, 45, 48, ?, 54, ?, 45}. Explain the method or strategy you used.

shania wants to measure the capacity of her bathroom sink. Circle the unit of measurement she should use to measure its capacity. POUNDS. TONS. QUARTS. OUNCES

Answers

Pounds because I don't think that a sink weighs a ton and ounces would be far to complex. Plus, you are measuring the capacity of a sink... Sorry if the answer sucks! I'm new at this and not all that smart...

Dany bought a total of 20 game cards some of which cost $0.25 each and some of which cost $0.15 each. If dany spent $4.20to buy these cards,how many cards of each type did he buy?

Answers

For this case we have to:

x: Represents the $ 0.25 game cards

y: Represents the $ 0.15 game cards

We have then:

0.25x + 0.15y = 4.20\nx + y = 20

From the second equation we have:

x = 20-y

Substituting in the first equation:

0.25 (20-y) + 0.15y = 4.20\n5-0.25y + 0.15y = 4.20\n5-0.1y = 4.20\n-0.1y = 4.20-5\n-0.1y = -0.8\ny = \frac {0.8} {0.1}\ny = 8

So, I buy 8 game cards for $ 0.15

On the other hand we have:

x = 20-8\nx = 12

So, I buy 12 game cards for $0.25

Answer:

Buy 8 game cards for $0.15

Buy 12 game cards for $0.25

What is true regarding chords and diameters of circles?A. both cords and diameters have two endpoints on a circle. Diameters must intersect the center of a circle.

B. both chords and diameters have two endpoints on a circle. Chords must intersect the center of a circle

C. Chords have two endpoints on a circle. Diameters have one endpoints on a circle and one at the center

D. Chords have one endpoint on a circle and one at the center. Diameters have two endpoints on a circle

Answers

Answer:

The correct answer is A.

Step-by-step explanation:

The only way to answer this question is to check the definitions of chord and diameter.

A chord is a segment with endpoints on the circle. In the attached figure the segments CD and GH are chords.

Now, notice that according to the given definition the segment EF is also a chord, but with the special characteristic that the center of the circle, denoted by A, it is on the segment. This ‘‘special’’ chords that contains the center of the circle are called diameter.

Sometimes the diameters are also called the larger of the chords.
the answer choice will be A

find the value of x if 3x - 20 = 130?find the value of x if 8x-2=-9+7x?
find the value of x if x + 6 = 33?

Answers

1.
3x-20=130
3x=130+20
3x=150
x=50

2.
8x-2=-9+7x
8x-7x=-9+2
x=-7

3.
x+6=33
x=33-6
x=27

those tasks are very simple, you should try to solve them on you're own first :)
3x-20=130\ \ \ /+20\n\n3x-20+20=130+20\n\n3x=150\ \ \ /:3\n\n3x:3=150:3\n\nx=50



8x-2=-9+7x\ \ \ /+2\ \ /-7x\n\n8x-7x=-9+2\n\nx=-7



x+6=33\ \ \ /-6\n\nx=33-6\n\nx=27

Will give brainlyMr. Brown is riding his bicycle along a road that is 1 Kilometer long. Both wheels are 1 meter in diameter.
How many times does each wheel revolve on his journey of 1 Kilometer?

Answers

Answer:

The wheels have to rotate 500 times

Step-by-step explanation:

The wheel is 1 meter in diameter so we need to find the circumference.

C = 2\pir

C = 2\pi1

C= 2\pi

2meters = .002kilometers

1000meters = 1kilometer

1000/2 = 500

The vertices of Triangle ABC are Upper A (-4, 4), Upper B (-2, 3) and Upper C (- 3, 2). If Triangle ABC is reflected across the line y= -2 to produce the image A'B'C', find the coordinates of the vertex B​'.

Answers

Answer: B’ ( -2, -7)
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