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3 years ago

Factorise completely 2y^2-4y

2 answers:

8 0

To factor an expression, first you have to find the GCF or Greatest Common Factor of all of the pieces of the expression.

The GCF of 2y^2 and -4y is 2y

So, to factor this expression, we need to divide all of the pieces of the expression by the GCF.

2y(y-2)

2y^2 - 4y in completely factored form is 2y(y-2)

bekas [8.4K]3 years ago

6 0

You find the gcf which is 2y
you factor it out: 2y(y-2)

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A culture started with 3000 bacteria. After 4 hours, it grew to 3,600 bacteria. Predict how many bacteria will be present after

Vlad [161]

Hello Shannonrodrigue. You can solve this by setting up an exponential growth equation.

$A = A_ob^t$
$3600 = 3000b^4$

Now we solve for b
$3600 = 3000b^4$
$\frac{3600}{3000} = \frac{3000b^{4}}{3000}$
$\frac{6}{5} = b^4$
$\sqrt[4]{\frac{6}{5}} = \sqrt[4]{b^4}$
$\sqrt[4]{\frac{6}{5}} = b$

Now that we have found b, we can use the equation $A = 3000b^t$ to predict how many bacteria will be present after 10 hours.
$b = \sqrt[4]{\frac{6}{5}}$
t = 10
$A = 3000b^t$
$A = 3000\sqrt[4]{\frac{6}{5}}^{10} = 4732.3228 = 4732$

Answer = 4732

4 0

3 years ago

How to you figure out tax rate? for example, 52.25 what an 8% sales tax

lions [1.4K]

52.25 x 0.08 = 4.18
So the tax is $4.18, and the total cost is $56.43

7 0

3 years ago

Read 2 more answers

Divide 3,000 yards by 1,760

Sonbull [250]

The answer to your question is 1.70

7 0

3 years ago

If the number of bacteria in a colony doubles every 210 minutes and the population is currently 8,000 bacteria, what will the po

Stells [14]

Answer:

D is the answer

64,000 exponential function

Step-by-step explanation:

64,000 exponential function

The number of bacteria in a colony doubles every 210 minutes.

The population of bacteria = 8000

Determine how many times the population will double.

$\frac{630}{210}$

= 3

Multiply the population by 2 a total of 3 times.

8000 × 2³ = 64,000

8 0

3 years ago

Which statement is true for the following graph:

snow_lady [41]

9514 1404 393

Answer:

H the range is all real numbers

Step-by-step explanation:

The arrows on the ends of the curve mean the curve extends to infinity. Then the domain (x-extent) is -3 to infinity.

The range (y-extent) is -infinity to infinity, <em>all real numbers</em>.

The appropriate description is ...

H The range is all real numbers

5 0

2 years ago