Ch 7 - Expressions
Simplify this expression:
a +6(a+3)
7a + 18
Solve. (1/3)a = 21
63
Is the following relation a function?
{(1, 3), (4, 9), (5, 3), (8, 9)}
Yes.
Classify this triangle.
A triangle has angle measures of 63, 63 and x.
0, 10, 1, 6, 2, 1, 3, 2, 2, 7
mean: 3.4 trees; median: 2 trees; mode: 2 trees
Factor this expression:
14x-21
7(2x-3)
Solve: (1/5)n - 3 = 7
n = 50
Find the rate of change between the quantities below.
{(0, 0), (4, 31), (8, 62)}
31/4
What three types of transformations keep congruence between the shapes?
translations, reflection and rotation
Is there an outlier in this set of data? If so, what is it? (the number of trees at a student's house)
0, 10, 1, 6, 2, 1, 3, 2, 2, 7
No, there is not.
The angles measures of a triangle are (x-9) degrees, x degrees, and (2x-3) degrees. Find the measures of the angles.
48, 93 and 96 degrees
Solve for c. 5c - 2 = c + 22
c=6
Which of these equations represents a direct variation? List all that are correct.
y= 3x +5 y = -3x
y = (1/2)x y = -(1/4)x -2
y = (1/2)x
y = -3x
What are the coordinates for the triangle ABC if the triangle is translated 2 units right and 5 units down?A (0, 1) B (2, 5) C (4, -1)
A (2, -4) B (4, 0) C (6, -6)
Find the mean absolute deviation for this data set.
35, 50, 40, 55, 45
mean absolute deviation: 6
Subtract (-3x+4) - (-7x-6)
4x+10
Solve this inequality.
24-3b < -15
b>13
A balloon is rising above the ground. The height in feet (y) of the balloon can be given by y = 7+2x, where x represents the time in seconds. State the slope and the y-intercept of the graph of the equation. Describe what the represent.
slope: 2 - the balloon rises 2 feet every second
y-intercept: 7 - the balloon starts 7 feet above the group
Find the vertex of this quadrilateral after a dilation with the scale factor k= 2/3
W (-3, 0), X (2, 6) Y (6, 2) Z (9, -3)
W (-2, 0) X (4/3, 4) Y (4, 4/3) Z (6, -2)
A coin is tossed and a number cube is rolled. What is the probability of throwing a head and a number greater than 2)
P(heads and a number greater than 2)
1/3
21 AED
Amnah buys five shirts on sale for AED 40 off the regular price. Her total cost is 550 AED before tax. Write an solve an equation to find the regular price of each shirt.
The regular price of a shirt is: 150 AED
Tickets to a museum cost AED 30 for children and AED 80 for adults. A group of four visitors to the museum spent a total of AED 220 on tickets. Write and solve a system of equations to represent this situation. Then interpret the solution.
2 children and 2 adults went to the museum.
Ms. Angie is using a photocopier to enlarge a worksheet of 12.5 cm by 17.5 cm. What is the scale factor if he enlarges the photograph to 25 cm by 35 cm?
Scale factor k=2
Forty-five people out of 60 people at City Center Mall said that they like Chili's. Is this sample representative of Fujairah? If so, how many people out of 800,000 can we expect to like Chili's.
If it were - we would expect 600,000 people to like Chili's