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3 years ago

12

Help plz. I need help with middle school math.

1 answer:

Whitepunk [10]3 years ago

7 0

Answer:

B is right. A is 50 km/h B is 55 km/h and C is 45 km/h

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Which of the following results in the expression 0.43 x 52? (1 point)

bekas [8.4K]

Answer:

43% of 52

Step-by-step explanation:

8 0

3 years ago

14. Boyle’s Law states that when a sample of gas is compressed at a constant temperature, the pressure P of the gas is inversely

Ostrovityanka [42]

Answer:

dV/dt = 100 cm³/min

Step-by-step explanation:

Given

V = 728 cm³

P = 182 kPa

dP/dt = - 25 kPa/min

dV/dt = ?

If we apply the ideal gas equation

P*V = n*R*T

where n*R*T is constant

we have

d(P*V)/dt = d(n*R*T)/dt

⇒ d(P*V)/dt = 0

⇒ V*(dP/dt) + P*(dV/dt) = 0

⇒ dV/dt = - (V/P)*(dP/dt)

Plugging the known values we obtain

⇒ dV/dt = - (728 cm³/182 kPa)*(- 25 kPa/min)

⇒ dV/dt = 100 cm³/min

5 0

4 years ago

What is the greatest common factor of 72 60 and 48?

Keith_Richards [23]

The greatest common factor is 12.

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4 years ago

Elizabeth has half as many CDs as Jennifer. Which equation would represent the number of CDs that Jennifer has? (Let e = the num

Sergio [31]

Answer: C

Step-by-step explanation:

2j = 2 × j = e

7 0

3 years ago

A swimming pool is 20.6 m long, 8.5 m wide, and has an average water depth of 1.7 m. Find the volume of water needed to fill the

viva [34]

Answer:

Thus Volume of pool is $297.67m^{3}$

<u><em /></u>

<u><em>GIVEN:</em></u> A swimming pool 20.6 m long 8.5 m wide and height 1.7 m

<u><em>TO FIND:</em></u> Volume of water needed to fill it.

<u><em>SOLUTION:</em></u>

<em>Length</em> = 20.6 m

Width = 8.5 m

<em>Height = </em>1.7 m

<em>Volume = L × B × H</em>

<em>→ </em> $1.7\times20.6\times8.5$ <em />

<em>→ </em> $297.67m^{3}$ <em />

<em />

Thus volume of pool is $297.67m^{3}$

<em>I hope this helps you </em>

<em>:)</em>

<em> </em>

7 0

2 years ago