Holly had $5,000 in her bank account. She withdrew $800 to buy a new bike. What is the percent decrease in the balance of her account?

Answer: -8

Step-by-step explanation:

Answer:

x = -8

Step-by-step explanation:

If you multiply -8 by 5 you get -40. Then if you add 65 to -40 you get 25.

Hope this helps.

A principle of $4500 amounts to $5,917.5 in 3.5 years at 9%.

What is simple interest?

We know simple interest (SI) is given by SI = (p×r×t)/100, where

p = principle, r = rate in percentage, and t = time in years.

Given, p = 4500, r = 9% and t = 3.5 years.

∴ SI = (4500×9×3.5)/100.

SI = $1417.5 and the amount is (4500 + 1417.5) = $5,917.5.

learn more about simple interests here :

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Answer:

Step-by-step explanation:

4500(1.09)^3.5

4500(1.5386239549)

$6923.80

Answer:

Step-by-step explanation:

The quadratic equation in its standard form is:

Now, we are given 5 points of the parabola (if you graph a quadratic equation you will have a parabola), however we only need to choose three points to find the coeficients , and in the quadratic equation.

So, let's choose the first three points:

(-1,14):

(1)

(0,7):

(2)

(1,4):

(3)

Substituting (2) in (1) and (3):

(4)

(5)

At this point we have a system with two equations.

Adding (4) to (5):

(6)

Isolating :

(7)

Substituitng (7) in (3):

(8)

Isolating :

(9)

Now we have the three coeficients and we can write the quadratic equation:

Answer:

slope 3/1

Step-by-step explanation:

Using a graphing calculator (desmos), input the points. Do rise over run and you'll get 3/1

Answer:x=1,y=3

Step-by-step explanation: