All categories

2 years ago

Determine the product. (−2x2) (x2 − 3x + 4)

Mathematics

1 answer:

Dmitry_Shevchenko [17]2 years ago

7 0

Answer:

−2x4+6x3−8x2

Explanation:

You weren't really asking for an explanation, if so let me know!

You might be interested in

Every year, the amount of CO2 in the atmosphere increases by a factor of

MrRa [10]

About 0.5 percent per year

8 0

3 years ago

Peter has 3200 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed a

salantis [7]

Answer:

$A = 640000\,yd^{2}$

Step-by-step explanation:

Expression for the rectangular area and perimeter are, respectively:

$A (x,y) = x\cdot y$

$3200\,yd = 2\cdot (x+y)$

After some algebraic manipulation, area expression can be reduce to an one-variable form:

$y = 1600 -x$

$A (x) = x\cdot (1600-x)$

The first derivative of the previous equation is:

$\frac{dA}{dx}= 1600-2\cdot x$

Let the expression be equalized to zero:

$1600-2\cdot x=0$

$x = 800$

The second derivative is:

$\frac{d^{2}A}{dx^{2}} = -2$

According to the Second Derivative Test, the critical value found in previous steps is a maximum. Then:

$y = 800$

The maximum area is:

$A = (800\,yd)\cdot (800\,yd)$

$A = 640000\,yd^{2}$

8 0

3 years ago

Read 2 more answers

HELPP!! BRAINLIEST??

ICE Princess25 [194]

Answer:

answer number 4 I believe

6 0

2 years ago

Read 2 more answers

Need help extra points and Mark as brainlist

Tanya [424]

Answer:

Step-by-step explanation:

8 0

2 years ago

a plane took 3 hours and 33 minutes to finish a journey. if the distance of the journey was 2840 miles, at what average speed di

likoan [24]

Answer:

The average speed of the plain was 800 miles/h.

Step-by-step explanation:

To solve this problem we first need to convert the time the tain took to finish the journey to hours. To do that we will divide the part that is in minutes by 60 and sum to the part that is in hours, we have:

time = 3 + 33/60 = 3 + 0.55 = 3.55 hours

The average speed is given by the following formula:

average speed = distance/time

average speed = 2840/3.55 = 800 miles/h

The average speed of the plain was 800 miles/h.

4 0

2 years ago