Lenny was putting bricks around his porch area. He paid $10 per brick $20 for the mortar to put around the bricks. He spent a total of $470. How many bricks did Lenny pruchase? Equation:

Solution:

Lenny purchased 45 bricks

Step-by-step explanation:

let's call the total amount of bricks x.

(equation) 10x + 20 = 470.

10x = 470-20

10x = 450

x = 45.

Lenny purchased 45 bricks.

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blue marble is 15 times out of 50 = 15/50 reduces to 3/10

landing on tails is 24 out of 50 = 24/50 reduces to 12/25

to find the probability of both multiply together:

3/10 x 12/25 = 3 x 12 / 10 x 25 = 36/250

if you multiplied the numerator and denominator by 10 you get 360/2500.

the answer is 360/2500

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step-by-step explanation: