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2 years ago

5x2 – 2x + 5 = 0 Solve

Mathematics

1 answer:

Tems11 [23]2 years ago

5 0

Answer:

$x = \frac{15}{2} = 7 \frac{1}{2}$

Step-by-step explanation:

$5 \times 2 - 2x + 5 = 0\\ 10 - 2x + 5 = 0 \\ 15 - 2x = 0 \\ 15 - 2x - 15 = 0 - 15 \\ - 2x = 0 - 15 \\ - 2x = - 15 \\ x = 15 \div 2 \\$

$\boxed{\green{\boxed{\bold{x = \frac{15}{2} = 7 \frac{1}{2} }}}}$

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2x - 3y = 8 // Find y

konstantin123 [22]

Answer:

$y = -\frac{2}{3} x - \frac{8}{3}$

Step-by-step explanation:

$2x - 3y = 8\\$

Isolate y

$-3y = 8-2x\\-3y = -2x+8$

Divide both sides of the equation by -3

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2 years ago

What is the domain and range of -2x + 3y= -12

monitta

Answer:

"all real numbers"

Step-by-step explanation:

Both the domain and range of any odd-degree polynomial function are "all real numbers." This is a degree 1 function in both x and y, so that description applies.

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2 years ago

Earnings You work for 4 h on Saturday and 8 h on Sunday. You also receive a $50 bonus. You earn $164. How much did you earn per

marshall27 [118]

Hello there,

best way to do this one is set up your story line....

4h + 8h + 50 = 164$...

let's make this easier to look at and combine like terms..

12h + 50 = 164$...

Beautiful!!! Now let's try and get the h alone?...

minus 50 to both sides...

12h = 114$..

now divide both sides by 12...

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Looks like you made 9.50$ an hour but Hey, at least you got that bonus ;)

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3 years ago

Function f is an exponential function. It predicts the value of a famous painting, in thousands of dollars, as a function of the

nalin [4]

Answer:

$y=8 \cdot (\frac{5}{4})^x$

$f(x)=8 \cdot (\frac{5}{4})^x$

$f(x)=8 \cdot (1.25)^x$

Step-by-step explanation:

We are going to see if the exponential curve is of the form:

$y=a \cdot b^x$ , ( $b\neq 0$ ).

If you are given the $y-$ intercept, then $a$ is easy to find.

It is just the $y-$ coordinate of the $y-$ intercept is your value for $a$ .

(Why? The $y-$ intercept happens when $x=0$ . Replacing $x$ with 0 gives $y=a \cdot b^0=a \cdot 1=a$ . This says when $x=0 \text{ that} y=a$ .)

So $a=8$ .

So our function so far looks like this:

$y=8 \cdot b^x$

Now to find $b$ we need another point. We have two more points. So we will find $b$ using one of them and verify for our resulting equation works for the other.