Answer:
Credit remaining after 21 minutes = $30.4
Step-by-step explanation:
Credit remaining on a phone card is a linear function of the total calling time.
When graphed, let the linear function representing the line is,
y = mx + b
Where 'm' = slope of the line
b = y-intercept
From the graph,
Slope of the line = -0.12
y = -0.12x + b
If this line passes through a point (33, 28.96),
28.96 = -0.12(33) + b
b = 28.96 + 3.96
b = 32.92
Therefore, the linear function is,
f(x) = -0.12x + 32.92
where x = calling time
Credit left in the card after 21 minutes,
f(21) = -0.12(21) + 32.92
= -2.52 + 32.92
= $30.4
The expressions that are equivalent to 6^16 is the 3rd option, and the last option.
Hope this Helps!! :D
Mark Brainliest!!
Answer:
1.436 or this=−2.436
Step-by-step explanation:
Answer: veasy
Step-by-step explanation: it is a rectangle then it's area will be length *breadth =45cm*26=1170cm^2.
Assuming you mean for x=3
f(3)=2(3)^2-3(3)+4
f(3)=2(9)-9+4
f(3)=18-5
f(3)=13
it is 13
