Suppose that the amount of algae in a pond doubles every 4 hours. If the pond initially contains 90 pounds of algae, how much algae will be in the pond after 12 hours?-720 pounds
-360 pounds
-1440 pounds
-114 pounds

Answers

Answer 1

Answer: After 12 hours the pound would have 720 pounds of algae.

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WHAT IA 2+2= AND IT BETTER BE RIGHT

Answers

4 lol I am definitely positive I am right about that :}

I need help i honestly don’t understand.

Answers

Answer:

basically she earns 800 regardless of whatever happens, and depending on how much she sells we give her 12% of that

so just take the value on the left and multiple by .12 and add to 800

not sure what the 5000 is

hope this helps

You have a restaurant bill of $61.45. If you are taxed 8 1/2 and decide to tip your server 15%, how much is your total? a. $75.65 b. $75.89 c. $76.32 d. $76.67

Answers

$75.89 i just took the test

Answer:

b. $75.89

Step-by-step explanation:

Edge 2020

For which system of equations is (2, 2) a solution?a. –3x + 3y = 0 x + 6y = 10
b. –2x + 5y = –6 4x – 2y = 4
c. 5x – 2y = –6 3x – 4y = 2
d. 2x + 3y = 10 4x + 5y = 18

Answers

Plug the values (x,y)=(2,2) into the equations and check if they satsify them.

a.
$-3x+3y=0 \nx+6y=10 \n \n\hbox{the first equation:} \n-3 * 2+3 * 2=0 \n-6+6=0 \n0=0 \ntrue \n \n\hbox{the second equation:} \n2+6 * 2=10 \n2+12=10 \n14=10 \nfalse \n \n\hbox{(2,2) satisfies only one of the equations} \n\hbox{so it's not a solution to the system of equations}$

b.
$-2x+5y=-6 \n4x-2y=4 \n \n\hbox{the first equation:} \n-2 * 2 + 5 * 2=-6 \n-4+10=-6 \n6=-6 \nfalse \n \n\hbox{the second equation:} \n4 * 2-2 * 2=4 \n8-4=4 \n4=4 \n true \n \n\hbox{(2,2) satisfies only one of the equations} \n\hbox{so it's not a solution to the system of equations}$

c.
$5x-2y=-6 \n3x-4y=2 \n \n\hbox{the first equation:} \n5 * 2 - 2 * 2=-6 \n10-4=-6 \n6=-6 \nfalse \n \n\hbox{the second equation:} \n3 * 2 - 4 * 2=2 \n6-8=2 \n-2=2 \nfalse \n \n\hbox{(2,2) satisfies none of the equations} \n\hbox{so it's not a solution to the system of equations}$

d.
$2x+3y=10 \n4x+5y=18 \n \n\hbox{the first equation:} \n2 * 2 + 3 * 2=10 \n4+6=10 \n10=10 \ntrue \n \n\hbox{the second equation:} \n4 * 2 + 5 * 2 =18 \n8+10=18 \n18=18 \n \n\hbox{(2,2) satisfies both of the equations} \n\hbox{so it is a solution to the system of equations}$

The answer is D.

Using a directrix of y = −3 and a focus of (2, 1), what quadratic function is created

Answers

5x+3 or (5,3) I think so

Distance from a point (x,y) on the graph of the function from the focus = distance from this point to the directrix. So we have

sqrt [( y-1^2 + (x - 2)^2] = y - (-3)

(y - 1)^2 + (x - 2)^2 = (y + 3)^2

y^2 - 2y + 1 + x^2 - 4x + 4 = y^2 + 6y + 9

8y = x^2 - 4x - 4

y = x^2/7 - x/2 - 1/2 Answer

What is 6 3/5% as a decimal