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koban [17]
2 years ago
15

a store has 300 televisions on order, and 80% are high definition. how many televisions on order are HD?

Mathematics
2 answers:
Korolek [52]2 years ago
8 0
240 Televisions are on HD.

Dafna1 [17]2 years ago
5 0

Answer: The number of televisions on order are HD  = 240

Step-by-step explanation:

Given : The number of televisions on order= 300

The percentage of televisions orders are high definition = 80%

i..e The proportion of televisions orders are high definition = 0.80  [ we divide percentage by 100 to convert into decimal]

Now , the number of televisions on order are HD = (Total televisions) x (proportion of televisions are high definition)

=(300) x (0.80)

=240

Hence, the number of televisions on order are HD  = 240

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a company added a new oil tank that holds 350 barrels of oil more than its old oil tank. Together they hold 3650 barrels of oil.
Tcecarenko [31]

Answer:

Capacity of old tank =  1650 barrels.    

Capacity of new tank =  2000 barrels.  

Explanation:

  Let a be the capacity of old tank and b be the capacity of new tank.

 A company added a new oil tank that holds 350 barrels of oil more than its old oil tank.

So we have    b - a  = 350 ----------------------equation 1

Together they hold 3650 barrels of oil

                        a + b = 3650 ----------------------equation 2

equation 1 + equation 2

                       2b = 3650 + 350 = 4000

                          b = 2000 barrels.

Substituting in equation 1

                  2000 - a = 350

                            a = 1650 barrels.

Capacity of old tank =  1650 barrels.    

Capacity of new tank =  2000 barrels.        

 

4 0
3 years ago
A customer requires a car service for 80 miles,
Xelga [282]

Answer:

$25

Step-by-step explanation:

Derive an equation to represent the cost of using each ride.

Sal's Car Rides:

Using 2 pairs of values from the table, (0, 40) and (20, 80), find the slope, m (fee per mile).

m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{80 - 40}{20 - 0} = \frac{40}{20} = 2

The y-intercept, b, is the one-time fee for fuel. This is the value of the cost ($) when number of miles traveled is 0.

Thus, b = 40.

Substitute m = 2, and b = 40 into y = mx + b.

Equation for the total cost for Sal's Car Rides would be:

y = 2x + 40.

Find the total cost to be charged if a customer requires the a car service for 80 miles if he chooses Sal's Car Rides.

Simply substitute x = 80 in y = 2x + 40.

y = 2(80) + 40 = 200

The customer would pay $200.

Ray's Limo:

The equation that represents the total cost (y) to be charged for number of miles (x), given that $2.50 is charged per mile plus a one-time fee of $25 for fuel, would be:

y = 2.5x + 25.

If a customer uses Ray's Limo services for 80 miles, the cost charged would be:

Substitute x = 80 in y = 2.5x + 25.

Thus:

y = 2.5(80) + 25 = 225.

The fee the customer would pay = $225 for using Ray's Limo services.

Therefore, if the customer takes Sal's Car Rides instead of Ray's Limo, he would save, $225 - $200 = $25.

The customer would save $25.

8 0
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Vlada [557]

Answer:

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Step-by-step explanation:

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Answer:sorry i need points for my test

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