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nordsb [41]
3 years ago
8

Alicia is solving a quadratic equation. She wants to find the value of x by taking the square root of both sides of the equation

. Which equation allows her to do this?
x2 + 81x + 18 = 54 space  x2-8x+24=17


x2+9x-24=25space x2+16x+64=36
Mathematics
2 answers:
sergejj [24]3 years ago
8 0
That's the last one because you can factor to get

(x + 8)^2 = 36

(x + 8) = +/- 6
Lyrx [107]3 years ago
5 0
X=19.5 because you multiply 23+5
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Given this rectangular prism with length
34kurt

Answer: width = 36 m

Step-by-step explanation:

Width = Volume / (height x length)

Width = 13500 / (25 x 15)

= 13500/375

= 36 m

4 0
3 years ago
The cost for Andrea to produce several units of a certain item is $336 plus $12 per unit. She sells this item for $28 per unit.
Morgarella [4.7K]
Profit will be achieved when the money earned is greater than the money spent so,
336 + (n*12) = n*28  any subsequent units sold would result in profit
336 = 28n - 12n
336 = 16n
=>  n = 336/16 = 21
21 units must be sold to draw even any more would result in profit
3 0
3 years ago
Seventy-six percent of sunflower seeds will germinate into a flower, and a sample of 800 such sunflower seeds is randomly select
ollegr [7]

Answer:

12.08

Step-by-step explanation:

For each sunflower, there are only two possible outcomes. Either it germinates, or it does not. The probability of a sunflower germinating is independent of other sunflowers. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

Seventy-six percent of sunflower seeds will germinate into a flower

This means that p = 0.76

Samples of 800:

This means that n = 800

The standard deviation for the number of sunflower seeds that will germinate in such samples of size 800 is:

\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{800*0.76*0.24} = 12.08

5 0
3 years ago
Simplify the rational expression 2X/X and state any values of X where the expression is undefined
Ivahew [28]

Answer:

2 and 0

Step-by-step explanation:

simplification=2x/x=2/1=2

only if the denominator is 0 can afraction be indefined so 0

3 0
3 years ago
I’m not getting these at all
spin [16.1K]

Answer:

\frac{a}{1 +bc} = x

Step-by-step explanation:

In this question, it appears that you need to solve this equation in terms of x.

Beginning with the equation a = x(1 + bc), we must isolate the 'x' variable and make an equation equivalent to 'x'. This can be done by:

a = x(1 + bc)

Divide (1 + bc) from both sides, giving you:

\frac{a}{1 +bc} = x

8 0
3 years ago
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