20 is 8 percent of what number? Please help!

2 answers:

8 0

Answer:

250

Step-by-step explanation:

You would get 20 times 10 so that would 80 percent of it

Then you would add another 16 percent so that would be 240

Then you have 4 percent left so half of 20 if 10

So therefore you have 250

4 0

Good evening

Answer:

250

Step-by-step explanation:

Let x be the unknown number

20 is 8 percent of x means 20 = x(8/100)

then 20 = 8x/100

then

8x = 2000

then

x = 2000/8

then

x = 250

Verification: 250×8% = 20

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Step-by-step explanation:

It is a bit difficult to input the work here, so I uploaded an image

First we can use the trig identities to change sec²(Ф) to tan²(Ф) + 1
Then we can combine like terms
Then we can factor this as a polynomial function
Then we can set each term equal to zero and solve for Ф
The first term tan(Ф) - 2 = 0 has no solution because tan(Ф) ≠ -2 anywhere
The second term tan(Ф) - 1 = 0 has two solutions of $\frac{\pi}{4}$ and $\frac{5\pi}{4}$ so these are the solutions to the problem