Exam 13

The ratio of sides of a triangle whose perimeter is 50 cm is like 2:3:5. Find the greatest side of this triangle.

• 15

• 45

• 20

• 25

• 35

Work out: $4\cdot\frac{5}{4}+22\div\frac{11}{8}$  

• 20

• 21

• 18

• 16

• 22

Solve: 36÷ x = 12 ÷ 10

• 30

• 31

• 32

• 43.2

• 48

If 𝜶 > 𝜷> 𝜸, simplify the expression:

|𝒂 − 𝒃| − |𝒄 − 𝒂| + |𝒃 −c|

• 2b-2c

• 0

• 2a-2c

• 2a-2b

• 2c-2b

. The ratio of the ages of two friends is directly proportional to the numbers 9 and 5. Two years before their ages were in the ratio 2:1. Find the ratio of their ages after 2 years.

• 3: 5

• 7:3

• 15:12

• 9:5

• 5:3

Work out:  $\left(3\frac{1}{3}-2\frac{1}{5}\right)\div1\frac{2}{15}$  

•  $1\frac{1}{15}$  

•  $\frac{1}{15}$  

• 1

•  $\frac{1}{2}$  

•  $1\frac{2}{15}$  

The side of an equilateral triangle is 15 cm. Find its perimeter.

• 40 cm

• 48 cm

• 30 cm

• 35 cm

• 45 cm

The ratio of angles with mutually perpendicular sides is 2:3. Find the greatest angle.

• 36°

• 108°

• 72°

• 54°

• 40°

A number and 3/5 of this number add up to 72. Find the number.

• 12

• 35

• 45

• 40

• 15

The product is sold for 330 manats with a profit of 10%. Find the original price of the product.

• 270

• 320

• 300

• 310

• 280