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3 years ago

2/9 of the students in the school are in 6th grade.

Mathematics

1 answer:

pochemuha3 years ago

3 0

Answer:

a. 20

b. 6

c. y=2/9x

Step-by-step explanation:

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A designer is working to decorate a circular room with a radius of 9 meters and needs to know the area of the room to purchase t

Natalija [7]

Answer:

Area of circle = 254.34 m²

Step-by-step explanation:

Area of circle = π×r²

Area of circle = 3.14 x 81

Area of circle = 254.34 m²

8 0

3 years ago

Read 2 more answers

Dr.Lamb is mixing a solution for his next patient. He has a cylindrical test tube which is 4 inches across on the inside. The de

SSSSS [86.1K]

Answer: There are 34.35 liters left in the test tube.

Step-by-step explanation:

Since we have given that

Depth of the tube = 9 inches

Circumference of base=4 inches

As we know the formula of circumference ,

$Circumference=2\pi r\\\\4=2\times \frac{22}{7}\times r\\\\4\times{7}{22\times 2}=r\\\\\frac{7}{11}=r$

Now, we need to find the volume of tube is given by

$\text{ Volume of test tube }=\pi r^2h\\\\\text{ Volume of test tube }=\frac{22}{7}\times \frac{7}{11}\times \frac{7}{11}\times 9\\\\\text{ Volume of test tube }=\frac{126}{11}=11.45\ inches^3$

Since we have also given that,

Of 1 cubic inch of space holds 3 liters of water,

So,

$1\text{ cubic inch}=3\text{ liters}\\\\11.45\text{ cubic inches}=3\times 11.45=34.35\text{ liters}$

Hence, there are 34.35 liters left in the test tube.

6 0

3 years ago

In each of the following ,make y the subject and hence find the value of y when a=2, b=3 ,and c=4.

zvonat [6]

Part i

$\dfrac{2a-7}{6y} = \dfrac{3b-5}{2c}$

$y = \dfrac{ 2c(2a-7)}{6(3b-5)} = \dfrac{c(2a-7)}{9b-15}$

Substituting,

$y = \dfrac{4(2(2)-7)}{9(3)-15} = \dfrac{ -12}{12} = -1$

Answer: -1

Part ii

I'm not sure that one's typed in correctly but I'll solve it as written.

$3-34y + 2a = \dfrac{3b-5}{2c + 1}$

$34y = 3+2a-\dfrac{3b-5}{2c + 1}$

$y = \frac 1 {34}\left(3+2a-\dfrac{3b-5}{2c + 1} \right)$

We're not asked to simplify it so I wont. Substituting,

$y = \frac 1 {34}\left(3+2(2)-\dfrac{3(3)-5}{2(4) + 1} \right) = \frac 1 {34}(7-4/9) = \dfrac{59}{306}$

Answer: 59/306

3 0

3 years ago

Input-Output 3 27 8 72 9 81 5 45 4 what is the answer for the 4 number?

Mkey [24]

Answer:

Try 36

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Nan rode the roller coaster 8 times, which was twice as many times as she rode the F erris wheel

lyudmila [28]

So she rode the Ferris Wheel 4 times. 8/2= 4

8 0

3 years ago