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3 years ago

(Easy) Whoever is fastest gets brainless and extra points.

Mathematics

1 answer:

alekssr [168]3 years ago

6 0

5/15 = 0.33 cm3 …… that is the answer I think of you can answer mine that would be great

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

5 0

2 years ago

What’s the correct answer

tatyana61 [14]

21.3 is the correct answer.

7 0

3 years ago

Jacob buys for muffins for $5 what is the cost of 7 muffins

Lyrx [107]

Answer:

35$

Step-by-step explanation:

If one muffin is 5 dollars and you buy 7 then just multiple them and get 5x7=35

8 0

3 years ago

Read 2 more answers

Divide. Write in simplest form.

butalik [34]

Yes. / = divide & * = multiply.
As for the equation, 10 divided by 1 2/3 is 15

7 0

3 years ago

Find the value of x: 3(6x - 4x) = -30<br> (Provide Step-By-Step)

Olegator [25]

Answer:

x = -5

Step-by-step explanation:

Multiply 3 by (6x - 4x) = 18x - 12x

18x - 12x = -30

6x = -30

x = -30 /6

x = -5

5 0

3 years ago

Read 2 more answers