Answer:
y = 9
Step-by-step explanation:
the two sides are balancing so that means one 'x' and three 'y' equals four 'x' plus one 'y'
x + 3y = 4x + y
subtract 'x' from each side to get:
3y = 3x + y
subtract 'y' from each side to get:
2y = 3x
if 'x' = 6 then:
2y = 3(6)
2y = 18
y = 9
The volume flow rate of the air being pumped into the football will be given by:
Q=V*A
Where
V=Speed
A=Area
You know that your pump expels air at speed of 8.2 ft/s
The area of The needle of your pump is
A=pi*r^2=pi*((4.5/1000)*(3.28))^2=0.00068442 ft^2
Finally
Q=V*A=(8.2 ft/s)*(0.00068442ft^2)=0.005612243 ft^3/s
Answer:
Gold
Step-by-step explanation:
<em>Casandra finds a treasure chest packed with metallic coins. The chest has a volume of 0.25 cubic meters. The coins have a combined mass of 4825 kg. Hoping to find gold, she calculates the density to determine the metal of the coins.</em>
<em>What kind of metal are the coins made of?</em>
<em>Bronze (8700 kg per cubic meter)</em>
<em>Silver (10500 kg per cubic meter)</em>
<em>Lead (11300 kg per cubic meter)</em>
<em>Gold (19300 kg per cubic meter)</em>
<em />
Density is mass per volume:
D = M / V
D = (4825 kg) / (0.25 m³)
D = 19,300 kg/m³
The coins must be made of gold.
Answer:
9
Step-by-step explanation:
3*3 =9
Answer:
the answer is 4
Step-by-step explanation:
32÷8=4 therefore b is 4