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2 years ago

Which describes the combined variation in the formula h=v/ πr^2?

Mathematics

1 answer:

noname [10]2 years ago

3 0

Step-by-step explanation:

h varies directly with v and inversely with the square of r.

1/pi is the constant of variation.

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Use properties of operations to determine whether 4r + 4t and 4(r+t) are equivalent. Explain your answer.

Vikki [24]

There is only one property used to determine whether

$4r+4t=4(r+t)$ .

The property is called the distributive property and in a nutshell it states, $a(b+c)=ab+ac$ , which means $a$ is distributed through $b+c$ using multiplication. So $4(r+t)$ says, distribute $4$ to $r$ and $t$ which then translates into $4r+4t$ .

4 0

2 years ago

if selina 8% commission on sales.on one sale,her commission was $20.40.what was the amount of that sales

Art [367]

Answer:

255

Step-by-step explanation:

20.40

100

20.40

100

20.40

100

255

Method 2:

20.40 x

% you want

% you've got

20.40

100

255

5 0

3 years ago

Evaluate 10C4. Type a numerical answer in the space provided. Do not type spaces in your answer.

SOVA2 [1]

10C4 represent the Combinations of 10 objects taken 4 at a time.

The formula for nCr is:

$nCr= \frac{n!}{r!(n-r)!}$

In the given case, n=10 and r=4. Using these values we get:

$10C4= \frac{10!}{4!(10-4)!} \\ \\ 
= \frac{10!}{4!*6!} \\ \\ 
=210$

This means we can make 210 combinations of 10 objects taken 4 at a time.

4 0

2 years ago

Stephen has a dog that weigths 5 times as much as lan's dog.The total weigths of both dogs is 72 pounds.How much does Stephens d

vesna_86 [32]

Answer: Stephens dog weighs 60 pounds

Step-by-step explanation:

4 0

3 years ago

Find perimeter in cm of the diagram

boyakko [2]

3 sides of square is 3*12=36 cm

perimeter for the full circle is 2 * pi * radius

which is =2 * 22/7 * 12 =75.43 cm

so 360° =75.43 cm

for 150° = 75.43/360 *150 =31.43

all together =36 +31.43 =67.43 cm

8 0

2 years ago