3 years ago

Which expression is equal to x−5x2+3−x2−x+4x2+3 ?

Mathematics

1 answer:

insens350 [35]3 years ago

8 0

the third option. I think

You might be interested in

How would you find out what 1/11 is as a decimal using a calculator?

Elanso [62]

Answer:

a the first one

Step-by-step explanation:

1/11 means 1 divided by 11

5 0

3 years ago

Read 2 more answers

Will give brainliest if right help plssss

zheka24 [161]

Answer:

B :)

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

How do you do this question?

mihalych1998 [28]

Answer:

C) π/6

Step-by-step explanation:

The area under the curve from x=-π/2 to x=k is 3 times the area under the curve from x=k to x=π/2.

$\int\limits^k_{-\frac{\pi }{2}} {cos\ x} \, dx = 3\int\limits^{\frac{\pi }{2}}_k {cos\ x} \, dx\\sin\ x\ |^{k}_{-\frac{\pi }{2}} = 3\ sin\ x\ |^{\frac{\pi }{2}}_k\\(sin\ k - (-1)) = 3\ (1 - sin\ k)\\sin\ k + 1 = 3 - 3\ sin\ k\\4\ sin\ k = 2\\sin\ k = \frac{1}{2}\\k = \frac{\pi}{6}$