MATHEMATICS MIDDLE SCHOOL

What is the approximate volume of a cylinder with a diameter of 12 meters and a height of 7 meters? Use 3.14 for pi. A.
131.9 m3

B.
263.8 m3

C.
791.3 m3

D.
3165.12 m3

Answers

Answer 1
Answer: The\ volume\ of\ the\ cylinder:V=\pi r^2 H\n(r-a\ radius);\ (H-a\ height)\n---------------------\ndiameter:d=2r\to\ 2r=12\ m\ therefore\ r=6\ m\n\nsubtitute\n\nV=\pi\cdot6^2\cdot7=\pi\cdot36\cdot7=252\pi\approx252\cdot3.14=791.28\approx\boxed{791.3\ (m^3)}\n\nAnswer:\boxed{C}

If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up (+1) ⇒ 791.28≈791.3

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the low temperature in colton for 5 days were -8 -13 -4 -9 and -16 what was the average low temperature for those 5 days

Answers

The average low temperature is -10.
-8+(-13)+(-4)+(-9)+(-16)= -50/5=-10
-10 because if you add all the temp up and divide it by 5 y'all get -10 -JZ

How many solutions are there to the equations 5x+1=3x+7?

Answers

5x + 1 = 3x + 7

Subtract 3x to both sides:

2x + 1 = 7

Subtract 1 to both sides:

2x = 6

Divide 2 to both sides:

x = 3

So this equation only has 1 solution.
5x+1=3x+7\n2x=6\nx=3

One.

Please helpppppppp meee​

Answers

Answer: 192 cm^2

Step-by-step explanation:

With parallelograms like this, you an just multiply the width and length to find the area. If you cut the shape up in a certain way, it would make a rectangle, so the formula length*width=area would also apply to parallelograms.

Compare 5 yd to 5 ft, 7in to 3ft, 3ft to 50in, 21ft to 4 yd, 9yd to 9in, 36in to 3ft

Answers

We know that

1 yard = 3 feet = 36 inches

To solve these types of problems, it's easiest to convert the number into one unit, and then compare.

1) Compare 5 yards to 5 feet

Let's convert to feet.

5 yards * 3 feet per yard = 15 feet
5 feet = 5 feet

Because 15 > 5, we know that 5 yards > 5 feet.

2) Compare 7 inches to 3 feet.

Let's convert to inches.

7 inches = 7 inches
3 feet * 12 inches per foot = 36 inches

Because 36 > 7, we know that 3 feet > 7 inches.

3) Compare 3 feet to 50 inches.

Let's convert to inches.

3 feet = 36 inches (we already did this above)
50 inches = 50 inches 

Because 50 > 30, we know that 50 inches > 3 feet.

4) Compare 21 feet to 4 yards.

Let's convert to feet.

21 feet = 21 feet
4 yards * 3 feet per yard = 12 feet

Because 21 > 12, we know that 21 feet > 4 yards.

5) Compare 9 yards to 9 inches.

For this problem, we don't need to do any calculations.  
We know that a yard is bigger than an inch, and therefore because there are equal amounts of these units, 9 yards > 9 inches.

6) Compare 36 inches to 3 feet

Let's convert to inches.

36 inches = 36 inches
3 feet * 12 inches per foot = 36 inches

Because 36 = 36, we can conclude that 36 inches = 3 feet.


I hope this helps!

Choose 3 of the following that are NOT equivalent to the expression below 1/2✖️7


A.) 1✖️7➗2
B.) 1
➖
2✖️7
C.)1✖️7✖️2
D.)1✖️7
➖
2
E.) 14

Answers

Well, 1/2*7=3.5. So you have to do each equation to see which ones are not equal to 3.5. A) 1*7=7/2=3.5 so A is not the right answer. B) 1/2*7=1/14=.07, so B is one of the correct answers. C) 1*7=7*2=14, so C is another one of the correct answers. D) 1*7/2=7/2=3.5, so D is not a correct answer. E) 14 is not equal to 3.5, so E is another correct answer. So the correct answers are B, C, and E.
B, C, and D are incorrect.

Hope this helps :)

What is the equation for the slope intercept form

Answers

The slope-intercept form is

y = mx + b,

where m = slope, and b = y-intercept

Now we get the y-intercept and the slope from the graph.

The y-intercept, b, is 4.

To find the slope, start at (-2, 0). Go up 4 and right 2 to point (0, 2). That is a rise of 4 and a run of 2.

m = slope = rise/run = 4/2 = 2

Equation:

y = mx + b

y = 2x + 4

Answer: y = 2x + 4
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