Answer:
Slope is positive for all x, so always increasing
Step-by-step explanation:
Increasing/decreasing depends on the slope of the function, which is f'
f'(x) = 9x² + 18x + 25
If f'(x) > 0 for all x, then his claim is correct (increasing for all x)
If there's even 1 x-value for which f'(x) is not positive, his claim is incorrect
f'(x) is a quadratic function.
9x² + 18x + 25
9(x² + 2x) + 25
9(x² + 2(x)(1) + 1² - 1²) + 25
9(x + 1)² - 9 + 25
9(x + 1)² + 16
Since the minimum value of f' is 16, it's always positive.
Hence, the claim is correct
Answer:
$8
Step-by-step explanation:
Five student tickets cost $40
Price for each student tickets
= Total cost of five student tickets/5 students
=$40/5
=$8
Each student ticket cost $8
Answer: True for all <em>b</em>.
Step-by-step explanation: To tangent a equation, find if the variable is true.
1. Add 56 to both sides.
63b - 56 + 56 = 63b - 56 + 56 = 7
2. Simplify.
63b = 63b
3. Simplify again for your answer.
0 = 0
Hence, both sides are equal.
Let me know if you have any questions.
~ Lily, from Brainly.
"<em>The product of 8 and a number increased by 4 is 60" </em>can be written as:
8y + 4 = 60
Your answer is A.
