7th grade math
Ramona is always confusing the associative and commutative properties. Explain her the difference between the two, and how to recognize each.
The associative property allows to regroup commutative property does not matter
5/7 = x/9
x = 45
what is 145/100 to a decimal
1.45
What is the decimal that is equivalent to 57 / 220?
0.2590 (Repeating)
20y - 84
4(5y - 21)
3x + 10 = 25
x = 5
2x + 8 <= 17
a2 = 64/225
a = 8/15, a = -8/15
Jasper paid $575 for an apple that had been marked down 35%. Calculate the original price of the apple before it went on sale.
Which point represents of reflection of (2, -3) across the y-axis:
(-2, -3)
(2, 3)
(-2, 3)
(3, -2)
A
5x - 3 <- x + 17
x < 10/3
If simplify: x < 2 1/3
15 + 17 + x2 + 5x
32 + x2 5x
Ben is 3 times as old as Daniel and is also 4 years older than Daniel. How old is Daniel?
d = 2
15x + 3 < -x + 10
x < 7/16
Maria has a bill of $50 for the house and has been discounted to 30%. How can we calculate Maria's bill for her house?
Maria will pay $35
Robert is painting a house. He has 35 cans of paint. He has used 30 cans of paint on the walls. Now he needs to paint the trim. If each section of trim takes 12 can of paint, how many sections of trim can he paint? Show your answer as an inequality with symbols, in words, and with a number line. Make sure that your solution makes sense for this situation.
1/2 x + 30 <_ 35
Give an example of an event that has a probability of 0
no possible outcomes
Roberto is having his house painted. The job takes three days, and he pays the painter the same hourly rate every day. The cost of the job is in the chart below.
Which of the following equations, where h represents hours worked and P the amount paid in the dollars, represent an hourly pay rate that is greater than the painter's hourly rate?
Day 1 Day 2 Day 3
Hours worked - 5 4 6
Amount paid - $300 $240 $360
P = 65h and P = 70h
Describe the 5-D Process in 2 sentences or more.
There are five Ds in the concept; Describe/Draw, Define, Do, Decide, and Declare.
From a group of 5 candidates, a committee of 3 people is selected. In how many ways can the committee be selected?
10
For the end-of-year party, Mt. Rose Middle School ordered 112 pizzas. There were eight fewer veggie pizzas than there were pepperoni pizzas. There were three times as many combo pizzas as pepperoni pizzas. Use the 5-D Process to define a variable and write an equation for this situation. Then determine how many of each kind of pizza were ordered.
16 veggie, 24 pepperoni, and 72 combo pizzas.
A rectangle has a length of 12 and an unknown width x. Wire expression for:
a the perimeter of the rectangle:
b the area of the rectangle:
x + 12
12x
y = -4x - 5
y = 3x - 2
Is (3, 7) a solution of the system?
No.