Answer:
(a)
Expression:
Amount you earn per hour: $3
(b)
Expression: 
Amount you spend on shirt: $18
Step-by-step explanation:
(a)
Let x represent the amount you earn per hour.

(b)
Let s represent the amount you spent on a shirt.

y = 12/13x - 2/13, characters
Answer:
7cm
Step-by-step explanation:
Other option are not whole numbers rather they are decimal numbers
Answer:
<u>x = 90</u>
Step-by-step explanation:
We know based on the trigonometric identity that :
Here, it's given : tan (x - 45)° = 1
<u>Equating</u>
- tan 45 = tan (x - 45) [both are equal to 1]
- 45 = x - 45
- <u>x = 90</u>