Ch 1
Is the following a function or not?
X | 0 5 10 15
Y | 3 7 7 11
Yes
Solve:
5 (x + 3) = 5x + 3
No solution
Solve for y.
-5x = -y - 11
y = 5x - 11
Write the equation of a line in point-slope form with a slope of -4/5 passing through (11, -13)
y + 13 = -4/5 (x - 11)
Evaluate:
89 + {6 + 3(-6 - 5) + 25}
153
Evaluate
1 + 6 / (2 + 1) - 1
2
Solve:
x = 30
5 8
x = 18.75
Graph the line:
y = 2/3x - 6
Write the equation of the line in slope-intercept form with a slope of -2 passing through (3, -5)
y = -2x + 1
When Miguel was 6 years old, his little sister, Leila, was half is age. If Miguel is 40 years old today, how old is Leila?
37 years old
The product of 5 and a number k is less than 60
5k < 60
Solve:
4x – 4 + 12x – 15 = 45
x = 4
Graph the line:
4x - 2y = 8
Write the equation of the line in point-slope form that passes through (2, -1) and (4, 2)
y + 1 = 3/2 (x - 2)
OR
y - 2 = 3/2 (x - 4)
-1 + 1 x (-1) - 1 + 1 / 1 + (-1)
-3
2u2 + v when u = 3 and v = 7
25
12x + 6 = 6(2x + 1)
Infinite solutions
Write the equation of a line perpendicular to:
y = 5x + 7
y = -1/5x + b
Write the equation of the line in slope-intercept form that passes through (1, -4) and (-1, 10)
y = -7x + 3
Find the slope:
2
Is -2 a solution?
4y – 1 > -20
Yes
Write the equation. Then find the variable.
Ann took a taxi home from the airport. The cost of the taxi was $2.10 per mile. She then gave the driver a tip of $5. If Ann paid a total of $28.10, how many miles was her trip home?
x = 11 miles
Write the equation of the following graph:
y = -1/4x + 3
Write the function that has values f(3) = 1 and f(-2) = -9
f(x) = 2x - 5
How much is a third of a half?
1/6