Elin, Inez, Wilmer, Xhantelle 9D

Algebra

100

x+7=19

x=12

200

x/2+5=2

x=-6

300

x²-13=23

x=6

400

2(3x+5)+13=71

x=8

500

x³+2(5+2)= 41

x=3

Simplifying

100

2a+b+a

3a+b

200

4a+b+c+a-2b

5a-b+c

300

a²-b+3a+5b

a²+3a+4b

400

ab+a+3b+2ab

3ab+a+3b

500

2ab²-2a+b+6a-ab+ab²-3b

3ab²-ab+4a-2b

Scale

100

If the length scale is 1:2, what is the area scale?

1:4

200

one line is 5cm an d the other is 15cm. What is the length scale?

1:3

300

If the length scale is 1:2, what is the volume scale?

1:8

400

If the area scale is 1:16, what is the volume scale?

1:64

500

A square has the side of 4dm. Another square has the side of 8cm. What is the area scale?

1:4

Geometry

100

A square has a 5cm side. What is the area?

25cm²

200

A rectangle has one side that is 2mm and one that is 6mm. What is the area?

12mm²

300

A circle has a diaeter of 4m. What is the area?

12,56m²

400

A cube has a sides: 5cm, 2cm and 6cm. What is the volume?

60cm³

500

A cylinder has the radius of 3dm and is 7dm long. What is the volume?

197,82dm³

%

100

50 procent av 500

250

200

30 procent of 300

90

300

how much procent is 50 of 1000

5%

400

70 procent av 630

441

500

räntan gick upp med 2% sedan ner med 3% och sedan upp med 13% om räntan nu är 45kr vad var den innan?

40,2 kr