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3 years ago

A teacher is writing an exam with 60

Mathematics

1 answer:

Mumz [18]3 years ago

7 0

20 is the answer your welcome you will get it right don’t worry

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Please help and explain

Murrr4er [49]

Answer: Option A

$x=\frac{3+i}{2}$ or $x=\frac{3-i}{2}$

Step-by-step explanation:

Use the quadratic formula to find the zeros of the function.

For a function of the form

$ax ^ 2 + bx + c = 0$

The quadratic formula is:

$x=\frac{-b\±\sqrt{b^2-4ac}}{2a}$

In this case the function is:

$2x^2-6x+5=0$

$a=2\\b=-6\\c=5$

Then using the quadratic formula we have that:

$x=\frac{-(-6)\±\sqrt{(-6)^2-4(2)(5)}}{2(2)}$

$x=\frac{6\±\sqrt{36-40}}{4}$

$x=\frac{6\±\sqrt{-4}}{4}$

Remember that $\sqrt{-1}=i$

$x=\frac{6\±\sqrt{4}*\sqrt{-1}}{4}$

$x=\frac{6\±\sqrt{4}i}{4}$

$x=\frac{6\±2i}{4}$

$x=\frac{3\±i}{2}$

$x=\frac{3+i}{2}$ or $x=\frac{3-i}{2}$

3 0

3 years ago

The diameter of a spherical basketball is 10 inches.

maksim [4K]

Answer:

523.6

Step-by-step explanation:

Here is the equation to get that answer:

V=4/3πr3=4/3·π·53≈523.59878

6 0

3 years ago

which of the following describes how to translate the graph y = |x| to obtain the graph of y = |x-1| -1

svetoff [14.1K]

Answer:

you got to put ylxl

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

If the equation x^2 - 12x - 9 = 0 is converted to the form (x - b)^2 = c and the resulting equation is (x - 6)^2 = c, what is th

Radda [10]

Answer:

Step-by-step explanation:

Identified

7 0

2 years ago

When rolling a number cube 600 Times, predict the relative frequency of rolling a 3 or 6

Flauer [41]

Answer:

The frequency of rolling a 3 or a 6 would be the same even if you try thousands or millions times.

The probability of rolling a 3 is: 1/ total outcomes probability = 1/6

The probability of rolling a 6 is: 1/ total outcomes probability = 1/6

The probability of rolling a 6 or a 3 = 2/ total outcomes probability = 2/6 = 1/3

Therefore, if you rolling the cube 600 times, the probability of rolling a 3 or a 6 is still 1/6. If 3 and 6 are both allowed, the probability would become 1/3

Hope this helped :3

7 0

3 years ago