7th
What is 30% of 90?
Answer:
0.30×90=27
Solve
45+7x4x0
0
8−(−5)=____
13
Find the slope with these points.
(2,4) (3,8)
4
4 notebooks cost $8. What is the unit rate?
8÷4=2 → $2 per notebook
If 4 pencils cost $2, how much do 10 pencils cost?
Unit rate = $0.50 per pencil
10×0.5=5
5^2
25
−3×7=____
-21
Convert to y=mxtb
3x+y=7
y=−3x+7
If 1 pencil costs $0.50, how much do 12 pencils cost?
12×0.5=6 → $6
Percent=Whole/Part×100
50%
3(5^2)
75
−6+14=____
8
Write equation with slope 3 and y-intercept -2
y=3x−2
A car travels 150 miles in 3 hours.
How far in 5 hours?
Unit rate = 50 mph
50×5=250
Radius is 5
c=2pir
pi=3.14
Circumference is 31.4
7(3+6)
63
3x+5=20
x =5
Volume of Cylinder
Radius = 3, Height = 5
V=πr2h
141.3
Is it Proportional?
Table:
x: 1, 2, 3
y: 5, 10, 16
Not proportional (ratio is not constant)
Solve: x−3>7
x>10
4^8
65,536
2(x+4)=18
x=5
Functions (Table)
x: 1, 2, 3
y: 4, 7, 10
Is this a function?
Answer: Yes (each x has one y)
Table:
x: 2, 4, 6
y: 6, 12, 18
Question:
What is the constant of proportionality?
k= 3