4 years ago

In a certain room, there are 28 women and 21 men. What is the ratio of

Mathematics

1 answer:

marishachu [46]4 years ago

4 0

Answer:

The men to women ratio is 3 : 4

The ratio between women to total number of people is 4 : 7

Step-by-step explanation:

Men to women ratio = 21 : 28 or 3 : 4

The men to women ratio is 3 : 4

Total people = 21 + 28 = 49 people

The ratio of women to total number of people is

28 : 49 or 4 : 7

The ratio between women to total number of people is 4 : 7

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Solving quadratic equation using the completing the square method. (a).x²+20x-12=0

irinina [24]

Answer:

$x = -10 + 4 \sqrt7 \ , \ x = -10 - 4 \sqrt7$

Step-by-step explanation:

x²+20x-12=0

a = 1, b = 20, c = -12

$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2x}$

$x = \frac{-20 \pm \sqrt{448}}{2}\\\\x = \frac{-20 \pm \sqrt{8 \times 8 \times 7}}{2}\\\\x = \frac{-20 + 8\sqrt{7}}{2} \ , \ x = \frac{-20 - 8 \sqrt7}{2}\\\\x = \frac{-10 + 4\sqrt{7}}{1} \ , \ x = \frac{-10 - 4 \sqrt7}{1}\\\\x = -10 + 4 \sqrt7 \ , \ x = -10 - 4 \sqrt7$