A certain television is advertised as a 13-inch TV (the diagonal length). If the width of the TV is 12 inches, how many inches tall is the TV?

The TV is 5 inches tall

Step-by-step explanation:

Let us revise the Pythagoras Theorem

In any right triangle

The tall and the width of the TV and its diagonal formed a right triangle whose legs are the tall and the width of the TV and the hypotenuse is the diagonal of the TV

∵ Width of TV = 12 inches

∵ Diagonal of TV = 13 inches

- By using Pythagoras Theorem

∵ (Diagonal)² = (width)² + (tall)²

∴ (13)² = (12)² + (tall)²

∴ 169 = 144 + (tall)²

- Subtract 144 from both sides

∴ 25 = (tall)²

- Take √  for both sides

∴ 5 = tall

∴ The TV is 5 inches tall

93.8

step-by-step explanation:

lets say, first number = x

second number = 3x+7

total = 49

(x)+(3x+7)= 49

4x+7 = 49

4x = 42

x = 42/4

x= 10.5

x= 10.5

3x+7 = 3(10.5)+7 = 93.8

hope this