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3 years ago

I need help please.

Mathematics

1 answer:

Andrei [34K]3 years ago

8 0

Answer: $556.50

Step-by-step explanation: 6% of 525 is 31.5 so 525 + 31.5 = 556.50$

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Emily collected a sample of geodes and measured their masses. Her sample is Normally distributed with a mean of 0.8 kilograms an

Alexandra [31]

Answer:

81.5%

Step-by-step explanation:

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3 years ago

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I need help!!!!!!<br> Help Needed!!!!

tatiyna

help with what? be sure to put everything you need to say into a question

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3 years ago

Which of the following is a solution of x2 + 6x = −18? x = 3 − 3i x = −3 + 3i x = −6 + 3i x = 6 − 3i

Marina86 [1]

Step 1 ) Move all terms right side of the equation.

$\displaystyle\ x^{2} + 6x = -18$

$\displaystyle\ x^{2} + 6x + 18 = -18 + 18$

$\displaystyle\ x^{2} +6x + 18 = 0$

Step 2 ) Apply quadratic formula. (Note: There are 2 solutions)

$\displaystyle\ x^{2} +6x + 18 = 0$

$\displaystyle\ x = \frac{-b\sqrt{b^{2}-4ac}}{2a}, \displaystyle\ x = \frac{-b-\sqrt{b^{2}-4ac}}{2a}$

$\displaystyle\ x = \frac{-6+\sqrt{6^{2}-4 * 18}}{2} , \displaystyle\ x = \frac{-6-\sqrt{6^{2}-4*18}}{2}$

$\displaystyle\ x = \frac{-6+6i}{2}$ ,

$\displaystyle\ x = \frac{-6-6i}{2}$

Step 3 ) Simplify.

$\displaystyle\ x = \frac{-6+6i}{2}$ ,

$\displaystyle\ x = \frac{-6-6i}{2}$

$\displaystyle\ x = -3+ 3i$ ,

$\displaystyle\ x = -3 - 3i$

Since the options only provide one of the answer we found, the answer is...

$\displaystyle\ x = -3 - 3i$

•

- <em>Marlon Nunez</em>

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2 years ago

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What is the axis of symmetry of a parabola if its x-intercepts are -3 and 5?

ollegr [7]

Answer:

The axis of symmetry will be at 1

Step-by-step explanation:

The middle of -3 and 5 will be the axis :)

-3, -2, -1, 0, 1, 2, 3, 4, 5

-2, -1, 0, 1, 2, 3, 4

-1, 0, 1, 2, 3

0, 1, 2

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3 years ago

40 POINTS!!!!!!!!!!!!!!!!!!

Natali5045456 [20]

~(-19,32)
Equation form x=-19,y=32

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2 years ago

I need help please. ​

I need help please.