NC Math 1 Review #1

Suppose that the equation                    V = 20.8x² - 458.3x + 3500 represents the value of a car form 1964 to 2002. What year did the car have the least value?

• 1965
• 1970
• 1975
• 1980

Cell phone Company Y charges a $10 start-up fee plus $0.10 per minute, x. Cell phone Company Z charges $0.20 per minute, x, with no start-up fee. Which function represents the difference in cost between Company Y and Company Z?

• f(x) = -0.10x - 10
• f(x) = -0.1x + 10
• f(x) = 10x - 0.10
• f(x) = 10x + 0.10

The boiling point of water, T (measured in degrees), at altitude a (measured in feet) is modeled by the function                           T(a) = -0.0018a + 212. In terms of altitude and temperature, which statement describes the meaning of the slope?

• The boiling point increases by 18 degrees as the altitude increases by 1000 feet.
• The boiling point increases by 1.8 degrees as the altitude increases by 1000 feet.
• The boiling point decreases by 8 degrees as the altitude increases by 1000 feet.
• The boiling point decreases by 1.8 degrees as the altitude increases by 1000 feet.

A line segment has endpoints J(2, 4) and L(6, 8). The point K is the midpoint of line JL. What is an equation of a line perpendicular to line JL and passing through K?

• y = -x + 10
• y = -x - 10
• y = x + 2
• y = x - 2

The floor of a rectangular cage has a length 4 feet greater than its width, w. James will increase both dimensions of the floor by 2 feet. Which equation represents the new area, N, of the floor of the cage?

• N = w² + 4w
• N = w² + 6w
• N = w² + 6W + 8
• n = w² + 8w + 12

A school purchases boxes of candy bars.
       -Each box contains 50 candy bars.
       -Each box costs $30.
How much does the school have to charge for each candy bar to make a profit of $10 per box?

• $0.40
• $0.50
• $0.80
• $1.25

A triangle has vertices at   (1, 3), (2, -3) and (-1, -1). What is the approximately perimeter of the triangle?

• 10
• 14
• 15
• 16

The vertices of quadrilateral EFGH are E(-7, 3), F(-4, 6),   G(5, -3), and H(3, -6). What kind of quadrilateral is EFGH?

• trapezoid
• square
• rectangle that is not a square
• rhombus that is not a square

The sequence below shows the total number of days Francisco had used his gym membership at the end of weeks 1, 2, 3, and 4.
4, 9, 14, 19, ...
Assuming the pattern continued, which function could be used to find the total number of days Francisco had used his gym membership at the end of week n?

• f(n) = n + 5
• f(n) = 5n - 1
• f(n) = 5n + 4
• f(n) = n²