A family spent $65 on dinner and left a 20% tip. What was the total cost of their meal?

Mathematics

2 answers:

Oxana [17]2 years ago

7 0

Answer: B, $78

Step-by-step explanation:

If the tip is 20% of the dinner cost, then we have to first find what is 20% of 65.

20% x 65 = 13. So the tip for the dinner is 13 dollars.

Now we have to add it to the original dinner cost.

65 + 13 = 78.

Therefore, the total cost of their meal is 78 dollars. So the answer is B, $78!

timama [110]2 years ago

4 0

Answer: A

Step-by-step explanation:

the total cost of their meal it usally means how much in total so we add 65+20 = 85

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The owner of an office building is expanding the length and width of a parking lot by the same amount. The lot currently measure

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The best and most correct answer among the choices provided by your question is the second choice or letter B "20".

The current area is 120(80)=9600 and he want to expand it by 4400 so that the new area will be 9600+4400=14000

14000=(120+x)(80+x)

14000=9600+200x+x^2

x^2+200x-4400=0

x^2-20x+220x-4400=0

x(x-20)+220(x-20)=0

(x+220)(x-20)=0, since x is an increase it must be greater than zero so

x=20ft

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