What is the geometric mean of 7 and 12? a. 1 5/7 b. 9.5 c. 2 21 d. 4 21

Mathematics

2 answers:

iris [78.8K]3 years ago

6 0

Alright, do you know what mean is?

galina1969 [7]3 years ago

6 0

C ................................

You might be interested in

Can u answer this??!!

Lelu [443]

1/2 gallon of milk makes 10 glasses.
$\frac{1}{2}$ x $\frac{1}{10}$ = $\frac{1}{20}$

4 0

3 years ago

Read 2 more answers

Need the answer to this thank you!

Sholpan [36]

Answer:

n = 4

Step-by-step explanation:

Use the explicit formula of a arthmetic sequence: an = a1 + d(n - 1)

a1 = -70

d = -10

an = -100

Do all of the steps and plug all the numbers with the formula.

So -100 = -70 - 10(n - 1)

-100 = -70 - 10n + 10

-100 = -60 - 10n

-100 + 60 = -40

-40 = -10n

-40/-10n = -10n/10

n = 4

So the final answer is n = 4. Just follow all of the steps and you will understand how I got my answer. Hope it helped!

7 0

3 years ago

A three inch diameter pulley on an electric motor that runs at 1800

Bezzdna [24]

Answer:

a) 3 inch pulley: 11,309.7 radians/min

6) 6 inch pulley: 5654.7 radians/min

b) 900 RPM (revolutions per minute)

Step-by-step explanation:

Hi!

When a pulley wirh radius R rotantes an angle θ, the arc length travelled by a point on its rim is Rθ. Then the tangential speed V is related to angular speed ω as:

$V=R\omega$

When you connect two pulleys with a belt, if the belt doesn't slip, each point of the belt has the same speed as each point in the rim of both pulleys: Then, both pulleys have the same tangential speed:

$\omega_1 R_1 = \omega_2 R_2\\$