MATHEMATICS MIDDLE SCHOOL

what is the answer for:

 

r = 9 ft

r = 21 m

d = 30 cm 

d = 24 cm

r = 15.2 in

r = 16.01 ft 

 

please answer them i just want the answer like example the answer for r= 9 ft is 56.52 ft

 

thanks!!!

 

 

Answers

Answer 1
Answer: r-a\ radius\ of\ the\ circle\n\nd-a\ diameter\ of\ the\ circle\n\na\ circumference\ of\ the\ circle:2\pi r=d\pi\n\nr=9ft\to2\pi r=2\pi\cdot9=18\pi\approx18\cdot3.14=56.52\ (in)\n\nr=21\ m\to2\pi r=2\pi\cdot21=42\pi\approx42\cdot3.14=131.88\ (m)\n\nd=30cm\to d\pi=30\pi\approx30\cdot3.14=94.2\ (cm)\n\nd=24cm\to d\pi=24\pi\approx24\cdot3.14=75.36\ (cm)\n\nr=15.2\ in\to 2\pir=2\pi\cdot15.2=30.4\pi\approx30.4\cdot3.14=95.456\ (in)\n\nr=16.01\ ft\to2\pi r=2\pi\cdot16.01=32.02\pi\approx32.02\cdot3.14=100.5428(ft)

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Graph the following equation and identify the y-intercept y=x+5
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Which system of equations below has exactly one solution?y = –8x – 6 and y = –8x + 6y = –8x – 6 and One-halfy = –4x – 3y = –8x – 6 and y = 8x – 6y = –8x – 6 and –y = 8x + 6

Solan and Julie each planted tulips. Of Solan's 20 tulips, 15 were red, while 10 of Julie's 20 tulips were red. Howmuch greater was Solan's fraction of red tulips than Julie's?

Answers

Answer: Fraction of red tulips of Solan is greater than fraction of red tulips of Julie by 0.75-0.5=0.25.

Step-by-step explanation:

Since we have given that

In case of Solan:

Number of red  tulips = 15

Total number of tulips = 20

In case of Julie :

Number of red tulips = 10

Total number of tulips = 20

So, Fraction of red tulips of Solan is given by (15)/(20)=0.75

Fraction of red tulips of Julie is given by (10)/(20)=0.50

So, Fraction of red tulips of Solan is greater than fraction of red tulips of Julie by 0.75-0.5=0.25.

Answer:

Solan's tulip fraction was 1.5 times greater than Julie's.

Step-by-step explanation:

15/20 of Solan's tulips were red, while 10/20 of Julie's were red.

Solan's tulip fraction was 1.5 times greater than Julie's.

A delivery truck made 8 stops in one neighborhood. By stop 5, there were 11 packages delivered. How many packages were delivered by stop 3?

Answers

Its proportion,
For 5 stops, its 11.
So, for 3 stops how many ??

5:11 :: 3:?
5/11 = 3/?
? = 3 × 11/5

? = 33/5 = 6.6 ≈ 7 packages

Nadia surveyed 80 students at her school and found that 0.55 of the students she surveyed said their favorite class is math. Another 15% of the students she surveyed reported that their favorite class is science. How many more students in the survey prefer math over science?A. 12
B. 32
C. 44
D. 48

Answers

Nadia surveyed 80 students at her school and found  the following results:
=> 0.55 of the students she surveyed said their favorite class is math.
=> 15% of the students she surveyed reported that their favorite class is science.
Let's find out many more students in the survey prefer math over science?
MATH
=> 80 students * 0.55  = 44 students love math.
SCIENCE
=> 80 * .15 = 12 students love science
=> 44 - 12 = 32 students

B. 32

It would be Choice "B"

Whats 95.131 rounded to the nearest hundredth

Answers

Answer:

95

Step-by-step explanation:

To round 95.131 to the nearest whole number consider the tenths’ value of 95.131, which is 1 and less than 5. Therefore, we have to round down: the whole number ones place value of 95.131, 95, remains 95, and the decimal point and all digits (.131) are removed.

95.131 rounded to the nearest whole number = 95

Answer:

95.13 !

Explanation:

Its 131 so its 1 away from 130, which is the closest hundredth. Also, we don't really need the 0, so its 95.13, instead of 95.130!

Solve for r:

-5 = 7 + 3r

Answers

So,

-5 = 7 + 3r
(subtract 7 from both sides)
-12 = 3r
(divide both sides by 3)
-4 = r
-5=7+3r\ \ \ \ \ \ |combine\ like\ terms\n\n-5-7=3r\n\n-12=3r\ \ \ \ \ \ \ |:3\n\nr=-4

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Answers

perpendicular slope: 1/3

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y + 4 = 1/3x - 2/3

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y = 1/3x - 14/3
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