Solving multi step equations
A system of linear equations can have how many types of solutions? What are they?
3 types:
One
None
Infinite
Which statement describing a function of x is true? A. The graph of y = 3x + 9 is linear and has a y-intercept of 9.
B. The graph of y = 3x is nonlinear and passes through the origin.
C. The graph of y = 3x2 is linear and passes through the point (0, 0).
D. The graph of y = 32x + 9 is nonlinear and passes through the point (0, 9).
A
Which of the following numbers is irrational?
12.6, 9.452648..., 56/99, sqrt(100)
9.542648....
Give a very close approximation of
sqrt(39)
6.1 to 6.3 is acceptable
c- 19 = 3(3-c)
c= 7
Fran buys used DVDs. She pays $2.75 for each DVD she buys. She graphs a line to show the total amount (y), in dollars, she pays to buy x used DVDs. Which equation correctly describes Fran’s line?
y = 2.75x
Which expression is equivalent to (44)2 x (47)-2
1/4^6
3sqrt9,9sqrt3,4sqrt9,9sqrt4
Which number is irrational?
9sqrt3
-4(-3n - 8) = 10n +20
n = -6
For babysitting, Nicole charges a flat fee of $3, plus $5 per hour. Write an equation for the cost, C, after h hours of babysitting. What do you think the slope and the y-intercept represent? How much money will she make if she baby-sits 5 hours?
Slope: cost per hour
Y-intercept: flat fee
$28
Which number is positive, rational, and has a value between 0 and 1?
-0.2, pi -3 ,sqrt(1/4), or 3/2
sqrt(1/4)
What is the order of the four numbers from least to greatest?
pi, sqrtpi,sqrt4,sqrt8
sqrt3,sqrtpi,sqrt8,pi
(6k + 4)/ 2 = 2k - 11
k = -13
A video rental store charges a $20 membership fee and $2.50 for each video rented. Write and graph a linear equation (y=mx+b) to model this situation. If 15 videos are rented, what is the revenue? If a new member paid the store $67.50 in the last 3 months, how many videos were rented?
y =2.50x +20
$57.50
19 videos
In the expression below, c is an integer.
9^c * 9^-c
1
The average distances between some objects in our solar system are described below.
• The average distance from Earth to the Moon is 3.844 × 105 kilometers (km).
• The average distance from Jupiter to the Sun is approximately 2 × 103 times the average distance from Earth to the Moon. Based on this information, what is the average distance from Jupiter to the Sun?
A. 7.688 × 10^2 km
B. 7.688 × 10^5 km
C. 7.688 × 10^8 km
D. 7.688 × 10^15 km
C
2/3(9x + 3) = 3/5(5X - 15)
x= -11/3 or -3 and 2/3
A linear function of x is graphed on a coordinate grid. The points (6, 34) and (18, 26) lie on the graph of the function. What are the rate of change of the function and the value of the function when x = 24?
rate of change:-2/3
value: 22
The side lengths of triangle ABC are listed below.
• AB = 7 mm
• AC = 12 mm
• BC = 6 mm
Is this triangle a right triangle? Why or why not?
Not a triangle. a^2 + b^2 is not equal to c^2
2^3 + 6 divide 3 -( -10 divide 2)
15