Answer: The test contains 10 three-point questions and 14 five-point questions.
Step-by-step explanation:
Let x represent the number of 3-point questions.
Let y represent the number of 5-point questions.
The maths test consists of 24 questions. This means that
x + y = 24
Each question is worth either 3 points or 5 and the test is worth 100 points. This means that
3x + 5y = 100 - - - - - - - - - - -1
Substituting x = 24 - y into equation 1, it becomes
3(24 - y) + 5y = 100
72 - 3y + 5y = 100
- 3y + 5y = 100 - 72
2y = 28
y = 28/2 = 14
Substituting y = 14 into x = 24 - y , it becomes
x = 24 - 14 = 10
Answer: n=c-d
Step-by-step explanation: n+d=c so n=c-d
Answer:
$2.99
Step-by-step explanation:
Given that:
Purchase price of cat calendar = $1.30
Markup = 100%
Hence, price at which the cat calendar was sold :
1.30 + 100%(1.35)
$1.30 + $1.30 = $2.60
Sales tax = 15%
Amount paid as sales. tax _
15% * 2.60 = $0.39
Total amount paid :
$2.60 + 0.39 = $2.99
