11 is only divisible by 1 and 11, it is a prime number. 21 is visible by 1, 3, 7, and 21; not a prime number. 51 is divisble by 1, 3, 7, 17, and 51; not a prime number. 11 is the only prime number .
Answer:
<em>Mr. Allen will need 28 oz. of preserver</em>
Step-by-step explanation:
<u>Proportions</u>
A direct proportion is a relation between variables where their ratio is a constant value. This means that if p and g are proportional, then:
p = kg
Where k is the constant of proportionality.
Where p is the quantity of preserver Mr. Allen needs to store his boat for winter, and g is the gallons of gas of the tank.
We are already given the ratio of fuel preserver and gallons of gas as 1 oz:2.5 gallons.
The value of k is, then k=1/2.5. The proportion is written as:
p = g/2.5
Since the boat holds g=70 gallons of gas:
p = 70/2.5 = 28
Mr. Allen will need 28 oz. of preserver
Answer:
H=12
Step-by-step explanation:
Answer: $199.87
Step-by-step explanation:
21% of 253 = 53.13
To find the amount of the September bill, you subtract 53.13 from 253
253 - 53.13 = 199.87
The September Bill was $199.87
Hope I helped!
Answer:
75
Step-by-step explanation:
showing that the two lines are proportinal based on their markings, it shows that x=55, and then you just do 180-(55+50), which is 75
