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3 years ago

15 POINTS‼️‼️‼️ Part B: Solve for x. Show your work.

Mathematics

1 answer:

Musya8 [376]3 years ago

7 0

Answer:

Step-by-step explanation:

A straight line adds up to 180 degrees, therefore 3x+6x = 180

9x = 180

x = 20

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Sviatoslav solved the quadratic equation x^2-x-1=0 by completing the square. In the process, he came up with the equivalent equa

zimovet [89]

Answer:

$x=\frac{1+\sqrt5}{2}$ and $x=\frac{1-\sqrt5}{2}$

and b= $\frac{5}{4}$

Step-by-step explanation:

We are given that a quadratic equation

$x^2-x-1=0$

We have to solve the equation by completing square and find the value of b.

$(x)^2-2\times x\times \frac{1}{2}+(\frac{1}{2})^2-(\frac{1}{2})^2-1=0$

$(x-\frac{1}{2})^2-\frac{1}{4}-1=0$

$(x-\frac{1}{2})^2-\frac{1-4}{4}=0$

$(x-\frac{1}{2})-\frac{5}{4}=0$

$(x-\frac{1}{2})^2-(\frac{\sqrt5}{2})^2=0$

$(x-\frac{1}{2})^2=(\frac{\sqrt5}{2})^2$

$x-\frac{1}{2}=\frac{\sqrt5}{2}$ and $x-\frac{1}{2}=-\frac{\sqrt5}{2}$

$x=\frac{\sqrt5}{2}+\frac{1}{2}=\frac{1+\sqrt5}{2}$

And $x=\frac{1}{2}-\frac{\sqrt5}{2}=\frac{1-\sqrt5}{2}$

Therefore, $x=\frac{1+\sqrt5}{2}$ and $x=\frac{1-\sqrt5}{2}$

and b= $\frac{5}{4}$

6 0

3 years ago

Can someone Help meeee!!

kirill [66]

70.24, That should be right

ekshzhsusjsnskwl

8 0

3 years ago

Read 2 more answers

Mr.Traynor's class is taking a field trip to the zoo.The trip will cost $26 for each student.There are 22 students in her class.

marta [7]

A good estimate would be $500 because if I round $26 to $25 and 22 to 20, 20x25=500

3 0

3 years ago

If f(x) = − 5, what is f(8. 6)? 3 4 8 9.

julsineya [31]

The value of f(8.6) is -5.

Given that

If f(x) = − 5,

We have to determine

What is f(8.6)?

According to the question

This function is independent of x.

There is no term associated with x on the function.

f(x) = − 5,

The given is not dependent on the variable it is an independent function.

Then,

$\rm f(x) = - 5 = f(8.6)\\\\f(8.6)=-5$

Hence, the value of f(8.6) is -5.

To know more about Independent Function click the link given below.

brainly.com/question/8061202

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2 years ago

Solve 3x - 9x + 7 - 3 = -8. a. 6 b. -6 c. 2 d. -2

Romashka-Z-Leto [24]

Answer: C. 2

Step-by-step explanation:

1. combine like terms

-6x + 4 = -8

2. Make x be by itself by subtracting -4 by both sides of the equal sign

-6x = -12

3. Divide both sides by -6, then negatives will cancel out

x= 2

(hope this helped)

8 0

3 years ago

Read 2 more answers