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allochka39001 [22]

3 years ago

10

Last year, Jina opened an investment account with $8200. At the end of the year, the amount in the account had decreased by 6.5%

How much is this
decrease in dollars? How much money was in her account at the end of last year?

HELP ——

1 answer:

adoni [48]3 years ago

5 0

Answer:

$250.69 maybe?

Step-by-step explanation:

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Subtract (In picture)

Sonbull [250]

--First we have to simplfy

$\frac{2x-8}{x^2-x-12} -\frac{x-3}{x(x+1)}$

$\frac{2(x-4)}{(x-4)(x+3)} - \frac{x-3}{x(x+1)}$

--Cancel common factors

$\frac{2}{(x+3)} -\frac{x-3}{x(x+1)}$

--Here remember never cancel factors in a subtraction or addition problem

--Now Multiply each side until both denominators are equal to each other

$\frac{2[x(x+1)]}{x(x+3)(x+1)} -\frac{(x-3)(x+3)}{x(x+3)(x+1)}$

--Simplify

$\frac{2x^2+2x}{x(x+1)(x+3)} - \frac{x^2-9}{x(x+1)(x+3)}$

--Now that the denominators are the same: subtract!

$\frac{2x^2+2x-(x^2-9)}{x(x+1)(x+3)}$

$\frac{2x^2-x^2+2x+9}{x(x+1)(x+3)}$

--And LAST STEP! ......Simplify More.... To get your answer

$\frac{x^2+2x+9}{x(x+1)(x+3)}$

6 0

3 years ago

If f ( x ) = x 4 + 6 , g ( x ) = x − 5 and h ( x ) = √ x , then f ( g ( h ( x ) ) ) =

zaharov [31]

Answer:

fgh(x)=4 $\sqrt{x}$ -14

Step-by-step explanation:

when solving composite fuctions we go from the right to the left

meaning we replace the x in the g function with the entire h function

then replace the x in the f function with the entire new g function

h(x)= $\sqrt{x}$

g( $\sqrt{x}$ )= $\sqrt{x}$ -5

f( $\sqrt{x}$ -5)=4( $\sqrt{x}$ -5)+6

f( $\sqrt{x}$ -5)=4 $\sqrt{x}$ -20+6

fgh(x)=4 $\sqrt{x}$ -14

3 0

2 years ago

Solve x2+5x=-9 that’s all please (:

Shalnov [3]

Answer:

x=-1.28571429

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

2 factors that add to 6 but multiply to 60

hodyreva [135]

Answer:

The short answer is there isn’t.

Start by writing each of these as an expression:

x * y = 60

x + y = 7

Next, solve each for the same variable; in this case, y:

(x * y) / x = 60 / x

.: y = 60 / x

(x + y) - x = 7 - x

.: y = 7 - x

Next, replace y of the second expression to the first

y = 60 / x & y = 7 - x

.: 7 - x = 60 / x

Now, solve for x:

(7 - x) * x = (60 / x) * x

.: x * 7 - x^2 = 60

This is quadratic, so write it in the form of ax2 + bx + x = 0

(-1)x^2 + (7)x + (-60) = 0

.: a = -1, b = 7, c = -60

Finally solve for b:

x = (-b +- sqrt(b^2 - 4*a*c)) / 2a

.: x = (-7 +- sqrt(7^2 - 4*-1*-60)) / (2 * -1)

.: x = (-7 +- sqrt(49 - 240)) / -2

.: x = (-7 +- sqrt(-191)) / -2

The square root of a negative value is imaginary and thus there’s no real answer to this problem.

8 0

2 years ago

2 x - 5 + 7 y - 3 = 9 x - 1 - y -8 Solve For X AND Y (SHOW WORK PLEASE)

Maru [420]

Answer:

$\large\boxed{\sf x = \frac{8y+1}{7} }$

$\large\boxed{\sf x = \frac{7x-1}{8} }$

<u>Group the Variable's</u>:

2 x - 5 + 7 y - 3 = 9 x - 1 - y -8

2x -9x + 7y +y = -1 -8 +5 + 3

-7x + 8y = -1

<u><em>From this find x and y</em></u>

<u>For X</u>

-7x + 8y = -1

-7x = -1 -8y

7x = 8y + 1

x = (8y +1)/7

<u>For Y</u>

-7x + 8y = -1

8y = -1 +7x

y = (7x -1)/8

3 0

1 year ago

Read 2 more answers