2 years ago

The measure of each exterior angle of a regular polygon is 18. find the number of sides in the polygon

1 answer:

3 0

The sum of all exterior angles for every shape is 360 so just divide 360 by the measurement of one exterior angle (18) to get 20

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Write the quadratic equation whose roots are -3 and 3 and whose leading coefficient is 5. (Use the letter x to represent the var

Bumek [7]

A(x - x₁)(x - x₂) = 0
a=5, x₁=-3, x₂ = 3

so:
5(x-(-3))(x-3)=0
5(x+3)(x-3)=0
5(x²-9) = 0
5x² - 45 = 0 ← answer

4 0

3 years ago

Andrew fish tank holds 144 gallons of water. To clean the tank, he drains the water at a rate the water at a rate of 6 gallons p

Kobotan [32]

Answer:

8 minutes

Step-by-step explanation:

Since the level of the tank needs to be at two-thirds its original level, then this means that Andrew needs to drain only one-third of the fish tank. Therefore the amount of time it would take can easily be solved with this 2-step equation...

6t = 144 * $\frac{1}{3}$ .... first multiply the right side of the equation

6t = 48 ... next divide both sides by 6

t = 8

Finally, we can see that it will take Andrew 8 minutes to drain the tank to two-thirds of its original level.

4 0

3 years ago

2. Which of the following is frue about the solution to the system of equations below? 2x + 4y = 9 2x + 4y = -9 A. The system ha

Lubov Fominskaja [6]

Answer:

Step-by-step explanation:

B. The system has infinitely many solutions. The system has one solution.

3 0

1 year ago

What is 22+54x=-20+60x

krek1111 [17]

Answer:

Step-by-step explanation:

22+54x=20+60x

54x=-42+60x

-6x=-42

x=7

4 0

3 years ago

What is this area? please help

Gnoma [55]

Answer:

Step-by-step explanation:

multiply the 20m x 6m

20x6=120. Is base x high

then

divide ➗ by 2

is equal to 60

I hope help you

4 0

2 years ago