How many solutions does the equation 9x+27=27 have ?

Answers

Answer 1

Answer: First we rearrange to make x = a number

9x + 27 = 27 <- subtract 27 from both sides
9x = 0

When x ='s a number there is 1 solution.
The answer is 1 solution.

Here are some examples to distinguish how many solutions something has:
> No solution, 0 = 12
> One solution, Y = 6
> Infinite solutions, 0 = 0

Please give me brainliest answer if I helped!

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Answers

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F(x) = $√(x+7) -√(x^2+2x-15)$ find the domain

Answers

Answer:

x >= -7 ................(1a)

x >= 3 ...............(2a1)

Step-by-step explanation:

f(x) = $√(x+7)-√(x^2+2x-15)$ .............(0)

find the domain.

To find the (real) domain, we need to ensure that each term remains a real number.

which means the following conditions must be met

x+7 >= 0 .....................(1)

AND

x^2+2x-15 >= 0 ..........(2)

To satisfy (1), x >= -7 .....................(1a) by transposition of (1)

To satisfy (2), we need first to find the roots of (2)

factor (2)

(x+5)(x-3) >= 0

This implis

(x+5) >= 0 AND (x-3) >= 0.....................(2a)

(x+5) <= 0 AND (x-3) <= 0 ...................(2b)

(2a) is satisfied with x >= 3 ...............(2a1)

(2b) is satisfied with x <= -5 ................(2b1)

Combine the conditions (1a), (2a1), and (2b1),

x >= -7 ................(1a)

AND

(

x >= 3 ...............(2a1)

x <= -5 ................(2b1)

)

which expands to

(1a) and (2a1) OR (1a) and (2b1)

( x >= -7 and x >= 3 ) OR ( x >= -7 and x <= -5 )

Simplifying, we have

x >= 3 OR ( -7 <= x <= -5 )

Referring to attached figure, the domain is indicated in dark (purple), the red-brown and white regions satisfiy only one of the two conditions.

f(x) =
find the domain

Anita tosses 3 coins. what is the probability that all the coins will land tails up?

Answers

A trick to get the total outcomes is multiplying the number of possibilities by how many trials. So in this case you multiply 2 x 2 x 2 because the only possible possibilities are tails or heads. And the probability of getting all tails is 1 so therefore the answer is 1/8

Probability that one coin will land tail up is 0,5.
If you toss 3 coins the probability that all the coins will land tails up is:
$0,5^(3)= 0,5 * 0,5 * 0,5 = 0,125.$ .

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Find the sale price of each item. Round to two decimal places when necessary. Original Price: $18 Markup: 15%Please Help