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2 years ago

9

A culture started with 6,000 bacteria. After 3 hours, it grew to 7,200 bacteria. Predict how many bacteria will be present after

19 hours.

1 answer:

yanalaym [24]2 years ago

3 0

There will be 45,600 bacteria present after 19 hours

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Phil smith is a car salesman. last week his total sales amounted to 27,650.00, and he received 1,382.50 in commissions. what is

klemol [59]

Divide 1382.5 by 27650 and you will get 0.05
This means that his commission rate is 5%

8 0

2 years ago

How many of degrees are in an angle that turns through 1/4 of a circle

zavuch27 [327]

1/4 turn = 90 degrees
<span>1/2 turn = 180 degrees </span>
<span>3/4 turn = 270 degrees </span>
<span>1 full turn = 360 degrees </span>

<span>:)</span>

7 0

2 years ago

Add the following polynomails -3x^2-2xy+y^2,-4x^2-xy+6y^2, x^2+6xy-y^2

Tomtit [17]

Answer:

When we add the given polynomials the result is

$(-3x^2-2xy+y^2)+(-4x^2-xy+6y^2)+(x^2+6xy-y^2)=3(2(y^2-x^2)+xy)$

Step-by-step explanation:

Given polynomials are

$-3x^2-2xy+y^2$ , $-4x^2-xy+6y^2$ , $x^2+6xy-y^2$

Now addding the polynomials we get

$(-3x^2-2xy+y^2)+(-4x^2-xy+6y^2)+(x^2+6xy-y^2)=-3x^2-2xy+y^2+-4x^2-xy+6y^2+x^2+6xy-y^2$

$=-6x^2+3xy+6y^2$ (adding the like terms on RHS)

$=3(-2x^2+xy+2y^2)$ (taking 3 outside on RHS)

$=3(2(-x^2+y^2)+xy)$

Rewritting the above equation we get,

$=3(2(y^2-x^2)+xy)$

Therefore $(-3x^2-2xy+y^2)+(-4x^2-xy+6y^2)+(x^2+6xy-y^2)=3(2(y^2-x^2)+xy)$

When we add the given polynomials the result is

$(-3x^2-2xy+y^2)+(-4x^2-xy+6y^2)+(x^2+6xy-y^2)=3(2(y^2-x^2)+xy)$

8 0

2 years ago

Please solve and explain how you got the answer

Nesterboy [21]

500 X 6 = 3000, then 6 X 1.6 = 9.6, so the answer is A, -9.6

6 0

2 years ago

Please someone help me answer this

atroni [7]

Answer:

x = 7

Step-by-step explanation:

( x +16)° = (4x - 5)°

x + 16 = 4x - x

16 + 5 = 4x - x

21 = 3x

7= x

hence, x =7

4 0

2 years ago