2 years ago

Which of the following numbers is a common multiple of 5 and 9?

Mathematics

1 answer:

cluponka [151]2 years ago

3 0

Step-by-step explanation:

5 = 5 × 1

9 = 3²

Common Multiple = 1 × 3² × 5 = 45

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What are the solutions of the quadratic equation (x + 3)2 = 49? A. O x = 2 and x = - 10 B.O.x = 4 and x = -10 C.O x=-2 and x = -

tatyana61 [14]

Answer:

B. x = 4 and x = -10

Step-by-step explanation:

First, expand the equation

(x + 3)² = 49

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

x² + 6x + 9 = 49

Subtract 49 from both sides

x² + 6x -40 = 0

Factor

(x + 10)(x - 4) = 0

Solve

x + 10 = 0

x = -10

x - 4 = 0

x = 4

So, the correct answer is B. x = 4 and x = -10

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2 years ago

Geoff has a bag that contains 4 red marbles and 6 blue marbles. He chooses two marbles at random and does not replace them. What

posledela

Total number of marbles = 10

Number of red marbles = 4

Number of blue marbles = 6

Probability = $\frac{number of favorable outcomes}{total number of outcomes}$

The probability that the first marble is blue = $\frac{6}{10}$

The probability that the first marble is red = $\frac{4}{9}$ ; 9 because 1 marble has already been taken out.

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3 years ago

Which of the following numbers is a common multiple of 5 and 9?​

Which of the following numbers is a common multiple of 5 and 9?