All categories

3 years ago

Simplify the expression below. (2y+1)^2-4y^2+2 A. 4y+3 B. 2y+3 D. -1

Mathematics

1 answer:

kramer3 years ago

5 0

Answer:

4 y + 3

Step-by-step explanation:

y = -3/4

d/dy((2 y + 1)^2 - 4 y^2 + 2) = 4

Indefinite integral:

integral(2 - 4 y^2 + (1 + 2 y)^2) dy = 2 y^2 + 3 y + constant

You might be interested in

Estimate by rounding each number to the nearest hundredth and then subtract 360.727 - 89.852

kykrilka [37]

Hi there!

The correct answer for you is 270.88.

To round to the hundreth's place (.01), you need to take the number in the thousand's place (.001), and determine if the number needs to go up or down.

If the number in the thousand's place is greater than 4, then the number goes up.

360.727 --> This means that the hundreth's number goes up to 3.

If the number in the thousand's place is lesser than 5, then that number stays the same.

89.852 --> This means that the hundreth's number stays the same.

After you round, then just subtract:

360.73 - 89.85 = 270.88.

I hope this helps!
Brady

7 0

3 years ago

If beyonce had 5 single ladies and she multiplied the single ladies by 13 how many single ladies would there be.

mars1129 [50]

Answer:

Step-by-step explanation:

5 x 13 = 63

is this what you asked for?

6 0

3 years ago

Read 2 more answers

A principal of $3700 is invested at 4.75% interest, compounded annually. How much will the investment be worth after 9 years?

kipiarov [429]

Amount = 3,700 * (1.0475)^9
Amount = 3,700 * 1.5184003135 
Amount = 5,618.08

7 0

3 years ago

Which of these situations does not have quantities that combine to make 0.

Lostsunrise [7]

Answer:

B. Hikroko earns $20 working concessions at the football game. she earns $20 as as babysitter

Step-by-step explanation:

also the person who keeps deleting all my answers i hope u break your back

4 0

3 years ago

Hank has to drain his pool so repairs can be done on a crack on the bottom. The company coming to fix the pool is scheduled to a

Alik [6]

Answer:

The answer to the question: "Will Hank have the pool drained in time?" is:

Yes, Hank will have the pool drained in time.

Step-by-step explanation:

To identify the time Hank needs to drain the pool, we can begin with the time Hank has from 8:00 AM to 2:00 PM in minutes:

Available time = 6 hours * 60 minutes / 1 hour (we cancel the unit "hour")
Available time = 360 minutes

Now we know Hank has 360 minutes to drain the pool, we're gonna calculate the volume of the pool with the given measurements and the next equation:

Volume of the pool = Deep * Long * Wide
Volume of the pool = 2 m * 10 m * 8 m
Volume of the pool = 160 m^3

Since the drain rate is in gallons, we must convert the obtained volume to gallons too, we must know that:

1 m^3 = 264.172 gal

Now, we use a rule of three:

If:

1 m^3 ⇒ 264.172 gal
160 m^3 ⇒ x

And we calculate:

$x = \frac{160 m^{3}*264.172 gal }{1m^{3} }$ (We cancel the unit "m^3)
x = 42267.52 gal

At last, we must identify how much time take to drain the pool with a volume of 42267.52 gallons if the drain rate is 130 gal/min:

Time to drain the pool = $\frac{42267.52gal}{130\frac{gal}{min} }$ (We cancel the unit "gallon")
Time to drain the pool = 325.1347692 minutes
Time to drain the pool ≅ 326 minutes (I approximate to the next number because I want to assure the pool is drained in that time)

As we know, Hank has 360 minutes to drain the pool and how it would be drained in 326 minutes approximately, we know Hank will have the pool drained in time and will have and additional 34 minutes.

7 0

3 years ago