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2 years ago

Decrease $88 by 5%please help i need step by step explanation

Mathematics

1 answer:

Viefleur [7K]2 years ago

8 0

Answer:

$83.6

Step-by-step explanation:

Decrease smth by 5%

means to get 95% of the previous number

so we can just multiply this number by 0.95 to get the result

that is:

$88 * 0.95 = $83.6

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BigorU [14]

Answer:

20%

Step-by-step explanation:

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Now divide the increase by the original number: 15/75=.20

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2 years ago

3x^2 + 4x = -8<br> solve using quadratic formula

Firdavs [7]

Use the quadratic equation to solve this (image of the quadratic equation is below)

Remember that quadratic functions are set up like so:

$ax^{2} +bx +c = 0$

To make the equation 3x² + 4x = -8 into a quadratic function you must bring -8 to the left side of the equation so it equals zero. To do this add 8 to both sides

3x² + 4x + 8= -8 + 8

3x² + 4x + 8 = 0

That means that in this equation...

a = 3

b = 4

c = 8

^^^Plug these numbers into the quadratic equation and solve (Keep in mind that +/- is ± )

$\frac{-4+/-\sqrt{(4)^{2}-4(3)(8)}}{2(3)}$

$\frac{-4+/-\sqrt{16-96}}{6}$

$\frac{-4+/-\sqrt{-80}}{6}$

^^^There is no real solution to this equation. You must have an imaginary solution

$\frac{-4+/-i\sqrt{80}}{6}$

Simplify

$\frac{-2+/-2i \sqrt{5}}{3}$

Hope this helped!

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2 years ago

Mason answers a question correctly in a trivia game and now has 0 points. The question was worth

zhannawk [14.2K]

Answer:

Mason recieved 15 points for answering the question correctly so that means that he had -15 points before. The points would be at -15 and 0.

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Decrease $88 by 5%please help i need step by step explanation​

Decrease $88 by 5%please help i need step by step explanation