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DiKsa [7]
3 years ago
15

Explain why there must be at least two lines on any given plane

Mathematics
1 answer:
Svetach [21]3 years ago
7 0
There has to be at least two lines on any given plane in order to plot an order pair.
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A bookstore costs $90 a day to keep open, and spends $12 for each book it sells. the store charges $18 for each book it sells. I
denpristay [2]
Total Cost in a day is TC= 90 + 12n. Profit function is P=18n. And the revenue function is R = P-TC = 18n-12n-90 = 6n-90. In a day, bookstore must sell at least 15 books, because of 6n-90=0, in order to make profit. 
4 0
3 years ago
Read 2 more answers
Last tuesday evening, Aaron, the car wash owner, found he had 90% more quarters than dimes. If the combined value of Aaron's qua
Alex Ar [27]

Aaron the car wash owner had 228 quarters and 120 dimes.

<h3>Equation</h3>

An equation is an expression used to show the relationship between two or more variables and numbers.

Let x represent the number of quarters and y represent the number of dimes. Hence:

x = 90% of y + y

x = (0.9y) + y

x - 1.9y = 0   (1)

Also:

0.25x + 0.1y = 69   (2)

From both equations:

x = 228, y = 120

Aaron the car wash owner had 228 quarters and 120 dimes.

Find out more on Equation at: brainly.com/question/13763238

4 0
2 years ago
Anna does sit-ups to get ready for her first triathlon. When she starts, she does a sit-up every 222 seconds. But, as she gets t
Alexeev081 [22]

Answer:

Choice B) No.

Step-by-step explanation:

When she starts , she does a sit-up every 222 seconds.

But as she gets tired, each sit-up takes longer and longer to do.

It means, each sit-up takes more time than she did at beginning.

So, it is NOT proportional to the time.

If it is proportional, she should take constant number of sit-ups even she get tired.

7 0
3 years ago
Answer I'll give brainliest to first one<br>10 points​
defon

Answer:

Have a splendiferous day...

Step-by-step explanation:

3÷12=¼

6÷10=⅗

7÷14=½

10÷11=⅚

2÷4=½

4÷16=¼

3÷24=⅛

18÷54=⅓

7 0
2 years ago
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Which is a true statement?
GarryVolchara [31]

d is true

Step-by-step explanation:

7 0
3 years ago
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