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2 years ago

Please help! 15 points!!

Mathematics

2 answers:

solmaris [256]2 years ago

7 0

I'm not sure if it's right, but I think the answer is 648.

nlexa [21]2 years ago

4 0

Answer 648 :)))))))))))))

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Which two values of x are roots of the polynomial below? x^2-3x+5

Gemiola [76]

Given:

Polynomial $x^2-3x+5$

To find:

The values of x.

Solution:

$x^2-3x+5=0$

Quadratic equation formula:

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

Here $a=1, b=-3, c=5$ .

Substitute the values in the formula, we get

$$x=\frac{-(-3) \pm \sqrt{(-3)^{2}-4 \cdot 1 \cdot 5}}{2 \cdot 1}$

$$x=\frac{3 \pm \sqrt{9-20}}{2}$

$$x=\frac{3 \pm \sqrt{-11}}{2}$

$$x=\frac{3 - \sqrt{-11}}{2} \ \text{and} \ x=\frac{3 + \sqrt{-11}}{2}$

Option E and option F are the roots of the polynomial.

The values of x are $x=\frac{3 - \sqrt{-11}}{2} \ \text{and} \ x=\frac{3 + \sqrt{-11}}{2}$ .

7 0

2 years ago

Need Help Badly<br>What is the solution

Kamila [148]

Sqrt(1-3x)=x+3
[sqrt(1-3x)]^2=(x+3)^2
1-3x=(x+3)(x+3)
1-3x=x^2+6x+9
-3x=x^2+6x+8
0=x^2+9x+8

The answers are -1 and -8 BUT, we have to plug them back into the original equation to make sure we don't get a negative under the square root sign.

After doing this, we realize that only -1 works, so the answer is x=-1

Sorry that this took forever to answer. I was thinking of a good way to explain this, and if you need any further explanation, message me:)

Best wishes:)

5 0

2 years ago

3 ft<br>3 ft<br>O What is the surface area of the 3-dimensio<br>shape?

Elanso [62]

The answer may be c but if not i am super sorry!!

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2 years ago

Reggie lost 3 spaceships in level 3 of a video game. He lost 45 points for each spaceship. When he completed level 3, he earned

Georgia [21]

Answer:

Reggie has 5 cockldos

Step-by-step explanation: