Exam 11

Find the remainder when 11+12 is divided by 7.

• 2

• 3

• 4

• 5

• 6

Find the perimeter of a square, if the area is 𝟏𝟔 squared 𝐜𝐦

• 16

• 8

• 32

• 24

• 64

Work out: $\left(\frac{1}{2}+0.7\right)^2$  

• 1.21

• 1

• 1.44

• 2.56

• 1.96

Factorize: 15a+21b

• 3(5b+7a)

• 3(5a+7b)

• 5(3a+21b)

• 7(15a+3b)

• 36ab

Work out: $\sqrt{1\frac{7}{9}}\div\sqrt{2\frac{14}{25}}$  

• 1/2

• 2/3

• 3/4

• 4/5

• 5/6

The first pipe fills the pool in 6 hours and the second pipe empties the same pool in 9 hours. After how many hours the pool will be filled

if both pipes start filling together.

• 12

• 18

• 15

• 10

• 20

Solve the equation: $\frac{2x+3}{5}=\frac{3x-2}{4}$  

•  $7\frac{1}{3}$  

•  $6\frac{1}{4}$  

•  $5\frac{1}{5}$  

•  $4\frac{1}{6}$  

•  $3\frac{1}{7}$  

 $f\left(x\right)=\frac{x^2+1}{x+1}$  . Find f(-2)

• -5

• 3

• -4

• 5

• -3

Simplify:  $\frac{4a\cdot9b}{12a}$  

• 3/b

• b/3

• 3b

• 3a

• 3

If m||n, find x+y.

•  $180^o$  

•  $360^o$  

•  $507^o$  

•  $408^o$  

•  $246^o$