Answer:
<img src="https://media.cheggcdn.com/study/785/7855d77d-e163-4f90-aa2d-4e70ccec0419/image" alt="Solved Use the graph below to answer the question that | Chegg.com"/>
Step-by-step explanation:
Try 5x - 8 + 43 = 90
or: 5x - 8 + 43 = 180
or try this: 5x - 8 = 43
solve for x
don’t forget to plug the number back in
Answer:
The first graph.
Step-by-step explanation:
The graph of the function y = 2x + 7, is a straight line because it is a linear function, and has y-intercept of 7 and a slope of 3; so we are looking for a graph that has these characteristics.
From the 4 graphs, we see that the 1st graph has a slope of 3 and a y intercept of 7, and thus it is the correct answer.
Answer:
after 5 seconds
Step-by-step explanation:
Given
h(x) = - x² + 3x + 10
When the rock hits the road the height h = 0
Equate h(x) to zero and solve for x, that is
- x² + 3x + 10 = 0 ( multiply through by - 1 )
x² - 3x - 10 = 0 ← in standard form
(x - 5)(x + 2) = 0 ← in factored form
Equate each factor to zero and solve for x
x - 5 = 0 ⇒ x = 5
x + 2 = 0 ⇒ x = - 2
However, x > 0 ⇒ x = 5
Thus the rock hits the road after 5 seconds.
