25/8 challenge

Random

100

Jesse - Expand

(x+2)(x+2)

x^2)

x^2+4x+4

200

Identify the radius and centre of the circle:

36=(x+3)^2+(y-2)^2

r=6, (h, k)=(-3, 2)

300

(49x^8y^2z)/(343x^5y^5z^5)

x^3/(7y^3z^4)

400

2x+3y=13

4x-y=5

x=2, y=3

500

Expand and simplify:

2x(y+2)-(x+3y)+(y-2)^2

2xy+3x-3y+y^2+4

Random

100

17/8+12/20

51/40

200

Find the centre and the radius of:

36=(x+4)^2+(y+12)^2

(h,k) = (-4,-12), radius =6

300

(2x+3)/(x-1)=7

x=2

400

(x+3)^3

x^3+9x^2+27x+27

500

2(x+4(2(x-3)))

18x-40

Random

100

4/7/3

4/21

200

5/7*8/12

10/21

300

Expand

(x-2)(x-2)

x^2-4x+4

400

(4x+6)(2x+12)

8x^2+60x+72

500

y=2x+3

32=2y+6x

x=2.6,y=8.2 

Random

100

1 2/3 /5/6 + 4 = ?

2

200

(3x-4)/7=-4

x=-8

300

(2x+1)/3=x-2

x=7

400

y=2x+5

21=4x+3y

x=0.6, y=6.2

500

(3x+2)/5+(4x-3)/3=2

Answer as a decimal

x=1.34

Random

100

1 12/16

28/16

200

3/(x-2)+2/x^2

(3x^2+2x-4)/(x^3-2)

300

(4x+3)/10=1

x=1.75

400

factorise

t^2-81

(t+9)(t-9)

500

expand

(3x-5)^3

27x^3-45x^2+85x-125