The domain is all real numbers, since x can be any number and create a y value

This can be written in a few ways, including:

X:X

X: R

-(infinity sign) is less than or equal to X is less than or equal to (infinity sign)

8 0

2 years ago

Sierra left $4.50 as a tip for a waiter. This was 18% of the bill before the tip. How much was her total bill before the tip? En

IrinaVladis [17]

Answer: $20.5

Step-by-step explanation:

Let x denotes the amount for total bill.

We are given that , Sierra left $4.50 as a tip for a waiter.

This was 18% of the bill before the tip.

We can write 18% = 0.18. [To convert percent into decimal we divide it by 100.]

Then, the tip amount = 0.18 x Total bill

$\Rightarrow\ 4.5=0.18x\\\\\Rightarrow\ x=\dfrac{4.5}{0.18}=25$

So, the total bill amount = $25

Hence, her total bill before the tip= Total bill amount - Tip amount

= $25- $4.50=$20.5

Thus ,her total bill before the tip= $20.5

6 0

2 years ago