I know solve 13but i want steps

Mathematics

2 answers:

Fynjy0 [20]3 years ago

6 0

From Pythagorean theorem in ADB triangle
AB^2+BD^2=AD^2
9^2+BD^2=15^2
BD=12

From Pythagorean theorem in BCD triangle
CD^2+BD^2=BC^2
BC^2=5^2+12^2
BC=13

mars1129 [50]3 years ago

5 0

Step-by-step explanation:

In triangle ABD,

ang.ABD=90°

AB=9 cm

AD=15 cm

Now,

Using Pythagoras theorem,

AD2=AB2+BD2(2=square)

or,152=92+BD2

or,225=81+BD2

or,225-81=BD2

or,144=BD2

or,BD=12 cm

Then,

In triangle CBD,

CD=5 cm

BD=12 cm

BC=?

Now,

Using Pythagoras theorem,

BC2=CD2+BD2

or,BC2=52+122

or,BC2=25+144

or,BC2=169

or,BC=13 cm

You might be interested in

A used-car dealer sold one car at a profit of 25 percent of the dealer's purchase price for that car and sold another car at a l

Daniel [21]

Answer:

C. 1000 loss.

Step-by-step explanation:

Let x represent purchase price of each car.

We have been given that a used-car dealer sold one car at a profit of 25 percent of the dealer's purchase price for that car and sold another car at a loss of 20 percent of the dealer's purchase price for that car.

We can represent the car that dealer sold with 25% profit to find purchase price as:

$x+0.25x=20,000$