Comparing Functions and Geometric Properties — Test
Question 4 • CMS 2026-2027 NC Math 1 CREDIT RECOVERY
The length of time in hours of two airplane flights are represented by the following functions, where x is the number of miles for the flight: Flight A: f of x is equal to 0 point 0 0 3 x minus 1 point 2 Flight B: g of x is equal to 0 point 0 0 1 5 x plus 0 point 8 Which function represents the total of the flight times, h of x is equal to f of x plus g of x ?
Answer
A
h of x is equal to 0 point 0 0 1 5 x minus 2
B
h of x is equal to 0 point 0 0 4 5 x minus 2
C
h of x is equal to 0 point 0 0 4 5 x minus 0 point 4
D
h of x is equal to 0 point 0 4 5 x minus 0 point 4
Explanation
Add the coefficients of x and the constant terms: 0.003x + 0.0015x = 0.0045x, and −1.2 + 0.8 = −0.4. Therefore, h(x) = 0.0045x − 0.4, which is choice B.
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