2 years ago

I’d x =48cm and y= 55cm, what is the length of w?

Mathematics

1 answer:

Trava [24]2 years ago

3 0

Answer: A

Step-by-step explanation:

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Solve each equation 3x^2=80

Lapatulllka [165]

Answer:

$x = \frac{4\sqrt{15}}{3}, x = \frac{-4\sqrt{15}}{3}$

$x = \frac{\pm4\sqrt{15}}{3}$

Step-by-step explanation:

Hello!

Use the quadratic formula: $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

First, let's convert our equation to standard form of a Quadratic: ax² + bx + c = 0

3x² = 80

3x² - 80 = 0

Note, thats the value of b will be 0, as there is no "bx"

Now, solve:

$x = \frac{-(0) \pm \sqrt{(0)^2 - 4(3)(-80)}}{2(3)}$ Plug in values
$x = \frac{\pm\sqrt{960}}{6}$ Simplify the radical (Discriminant)
$x = \frac{\pm8\sqrt{15}}{6}$ Pull out perfect squares
$x = \frac{4\sqrt{15}}{3}, x = \frac{-4\sqrt{15}}{3}$ Reduce factors

The solutions are $x = \frac{4\sqrt{15}}{3}, x = \frac{-4\sqrt{15}}{3}$

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1 year ago

Men's socks. Cost $8.00 for a package of three. How much would two dozen socks cost ?

weeeeeb [17]

1 dozen = 12

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8/3 = x/24
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two dozen socks would cost $64

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Step-by-step explanation:

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It costs $20 to enter an amusement park and $0.50 to go on each ride. You have $24. How many rides are you able to go on?

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Step-by-step explanation:

20 + .50x = 24

-20 -20

.50x = 4

/.50 /.50

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