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3 years ago

7-5/7 what would be the answer?

Mathematics

2 answers:

KatRina [158]3 years ago

8 0

Answer:

6.28571428571

Step-by-step explanation:

Sophie [7]3 years ago

7 0

Here you go
You can always follow the structure no matter what number it is, just replace the letters with numbers

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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.

Let's do this.

We are given $(1,10)$ is a point on our curve.

So when $x=1$ , $y=10$ .

$10=8 \cdot b^1$

$10=8 \cdot b$

Divide both sides by 8:

$\frac{10}{8}=b$

Reduce the fraction:

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

So the equation if it works out for the other point given is:

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

Let's try it. So the last point given that we need to satisfy is $(2,12.5)$ .

This says when $x=2$ , $y=12.5$ .

Let's replace $x$ with 2 and see what we get for $y$ :

$y=8 \cdot (\frac{5}{4})^2$

$y=8 \cdot \frac{25}{16}$

$y=\frac{8}{16} \cdot 25$

$y=\frac{1}{2} \cdot 25}$

$y=\frac{25}{2}$

$y=12.5$

So we are good. We have found an equation satisfying all 3 points given.

The equation is $y=8 \cdot (\frac{5}{4})^x$ .

4 0

3 years ago

You invest $2,000 in an account that is compounded annually at an interest rate of 5%. You never withdraw money from the account

Yuki888 [10]

Formula for amount for compound interest:

Amount, A = P(1 + r/100)^n

Where r is rate, P is principal, and n is the number of years.

P = 2000, r = 5, n = t years.

A = 2000( 1 + 5/100)^t

A = 200(1+0.05)^t

A = 2000(1.05)^t

A(t) = 2000(1.05)^t

None in the option look like the answer we have.

Except you didn't type the last option correctly.

5 0

4 years ago

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PLEASE ANSWER ASAP FOR BRAINLEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

elena-s [515]

Answer:

yes!!? hiii, what do u need?

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2 years ago

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A quadrilateral with two pairs of consecutive sides congruent and no opposite sides congruent is called a(n)

Sedbober [7]