The answers to the questions
Answer:
(x) =
x + 7
Step-by-step explanation:
let y = f(x) and rearrange making x the subject, that is
y = 3(x - 9) + 6 ← distribute and simplify right side
y = 3x - 27 + 6 = 3x - 21 ( add 21 to both sides )
y + 21 = 3x ( divide all terms by 3 )
y + 7 = x
Change y back into terms of x with x =
(x) , thus
(x) =
x + 7
Answer:
6.4 km/h
Step-by-step explanation:
From the triangle above we see that speed=distance÷time therefore, speed=19.2÷3 which works out to be 6.4 km/h
Answer:
(0,-3)
Step-by-step explanation:
Answer:
88%
Step-by-step explanation:
There are 67 questions on an exam
You miss 8 questions
The first step is to calculate the number of correct questions
= 67-8
= 59
Therefore the grade can be calculated as follows
= 59/67 × 100
= 0.880 × 100
= 88%
Hence the grade is 88%