2 years ago

Can anyone help me please

Mathematics

1 answer:

Lapatulllka [165]2 years ago

5 0

Answer:

x= 3 and x= -3

Step-by-step explanation:

x^2 -9 = 0

Factor x^2-9

(x+3)(x-3)

If x+3=0, then x= -3

If x-3=0, then x= 3

You might be interested in

The computer to the left is on sale for $199.99. What is 50% of the price?

Reika [66]

Answer:

$99.99

Step-by-step explanation:

You do 199.99/2 and that is 99.99

8 0

2 years ago

Read 2 more answers

Assume x=x(t) and y=y(t). Find dx/dt if x^2(y-6) = 12y + 3 and dy/dt = 2 when x = 5 and y = 12

777dan777 [17]

$x^2(y-6)=12y+3$

Differentiate:

$2x\dfrac{\mathrm dx}{\mathrm dt}(y-6)+x^2\dfrac{\mathrm dy}{\mathrm dt}=12\dfrac{\mathrm dy}{\mathrm dt}$

Plug in everything you know: $\dfrac{\mathrm dy}{\mathrm dt}=2$ , $x=5$ , and $y=12$

$2(5)\dfrac{\mathrm dx}{\mathrm dt}(12-6)+5^2(2)=12(2)\implies\dfrac{\mathrm dx}{\mathrm dt}=-\dfrac{13}{30}$

6 0

3 years ago

Please explain this I need help

Ira Lisetskai [31]

Do you need help dividing??

5 0

2 years ago

In the North Area Mall, 18 of the 90 stores sell shoes. If that same ratio holds true for the University Mall and 9 stores there

goldenfox [79]

Answer:

18/90=9/x and to find x use proportion so first 90*9=18x and 810=18x and x-45

Step-by-step explanation: