Which point is on the graph of f(x) = 3 x 5^x?
2 answers:
Answer:
C
Step-by-step explanation:
To determine which point lies on the graph, substitute the x-coordinate into f(x) and if the value is equal to the y-coordinate then the point is on the graph
A (15, 1)
f(15) = 3 × ≠ 1 ← not on graph
B (0, 15)
f(0) = 3 × = 3 × 1 = 3 ≠ 15 ← not on graph
C (1, 15)
f(1) = 3 × = 3 × 5 = 15 ← lies on graph
D (0, 0)
f(0) = 3 × = 3 × 1 = 3 ≠ 0 ← not on graph
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Answer:
The answer to your question is x - 5 or x = 5
Step-by-step explanation:
1.- Factor the numerator
x² - 3x - 10
find 2 numbers that added equal -3 and multiply equal -10.
These numbers are -5 and + 2
(x - 5)(x + 2)
2.- Simplify
Delete (x +2) in both numerator and denominator
3.- Result x - 5
x = 5