1. Javier has a part-time job and saves \( \$ 10 \) of his hourly pay for the purchase of a new laptop that costs \( \$ 648 \) . He has \( \$ 80 \) saved already. Which inequality represents the number of hours, \( x , \) Javier must work to buy the laptop? (2019 Released Item)
a. \( 10 x + 80 \geq 648 \)
b. \( 10 x + 80 \leq 648 \)
c. \( 10 + 80 x \geq 648 \)
d. \( 10 + 80 x \leq 648\)
a
A linear function that models data is described below. Find the slope of the model. Then describe what this means in terms of the rate of change of the dependent variable per unit change in the independent variable. The linear function \( f ( x ) = - 0.41 x + 28.6 \) models the percentage of adults in a country who smoked cigarettes, \( f ( x ) \) , \( x \) years after \( 1997 \) .
The slope is \( \square \) . (Type an integer or a decimal.)
Use the quadratic formula or completing the square to determine the greater solution to
\( x ^ { 2 } + 4 x + 2 = 0 \) . Round your answer to the nearest hundredth. Record your answer and fill in the bubbles on your answer document.
