maf stuf

Percentages

100

500 is 50% of what number

1000

200

27% of 120

32.4

300

67 is 60% of what number?

111.666...

400

197 is 117% of what number?

168.376...

500

Tyrone Johntavious the Third Junior is paid $15 an hour. Last week he worked 30 hours. This week he worked 30 hours and made $360. What was the percent decrease in hourly pay?

360 / 30 = 12 (this week's hourly pay)

This week's hourly pay was $12, and last week's was 15. We subtract 12 from 15 and get 3, and then divide 3 by 15. 

We get 0.2, so we multiply that by 100, and get 20.

There was a 20% decrease in hourly wage

Combining/Expanding Like Terms

100

Factor.

(100z+100h+100i)

100(z+h+i)

200

Combine.

15x+160-30x+2x-300+120

-13x-20

300

Factor.

8y+16x+128t-160+40r

8(y+2x+16t-20+5r)

400

Distribute.

5+6(y-5t+3c)+(5(10g+6x))+3

8+6y-30t+18c+50g+30x

500

(x+40)(x+50)

1: x²

2: 50x

3: 40x

4: 200

Combine: x²+90x+200

Exponents/Square Roots

100

2 + √1369

39

200

(3 + ³√512000)²

6889

300

((50+6²30)⁰)+((30²+√3600)) + 34

6676

400

Who is the coolest in 717?

The school?

The world?

The entire existence of any form of matter?

(hint: it's not jeremy)

zhi

500

(34⁰((-50²+3)+34)+((50-60)²)) + 300

2937

Ratios and Proportions

100

Equivalent ratio to 5:3

A) 15:13

B) 25:15

C) 25:9

D) 10:8

B

200

Is this chart proportional?

X         Y

 4         2

 8         6

12       10

16       14

no

300

Is each equation proportional?

y=8x          (y/n)

y=2x+0      (y/n)

y=-5x         (y/n)

y=2x+4      (y/n)

YES

YES

YES

NO

400

What is the meaning of life?

also what is the constant of proportionality

y = 6x + 56

and simplify this

2016:5040

zhi 

6

2:5

500

5:10, 10:20, 20:40

What is the 10th ratio in this sequence?

5:10, 10:20, 20:40, 40:80, 80:160, 160:320, 320:640, 640:1280, 1280:2560, 2560:5120

2560:5120 is the 10th ratio in the sequence.

Coordinate Planes/Angles

100

What quadrant is (-180,5002) in?

(hint: It's not quadrant 5)

Quadrant 2, ll

200

There are two parallel lines.

There is another line intersecting both lines; What is the intersecting line called?

Traversal.

300

There was a translation of (x+33,y-22)

What would be the new point for (53,67)?

(86,45)

400

Point A has the coordinates of (-5,6)

It is then reflected on the y axis of x = 2

(9,6)

500

There is a triangle.

Two segments, (the left leg(A), the base(C)) measure 16 units and 14 units. 

They meet at a 56 degree angle. 

What is the missing side length (C)?

C²=16² + 14² - 2 x 16 x 14 x cos(56)

C²=256 + 196 - 448 x cos(56)

C²=452 - 448 x cos(56)

C= √452-448 x cos(56)

C ≈ 8.352