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VMariaS [17]
2 years ago
7

8. What is the solution to l + (-3) = 9? A. 1=6 B. 1 = 12 C. 1 = -12 D. 1=-6

Mathematics
2 answers:
zhenek [66]2 years ago
6 0

Answer:

The answer is B

Step-by-step explanation: Pretty much you first +3 to cancel out the negative 3 also add 3 to 9 which is 12 then to check it -3 + 12 is 9

kozerog [31]2 years ago
3 0
B. 1 = 12

i + (-3) is really just i - 3
i - 3 = 9
add 3 to both sides since the opposite of -3 is +3
you’re left with i = 12
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Which operation should you perform first when you simplify 175 - ( 8 + 45 divided by 3) times 7?
KatRina [158]

Answer:

Step-by-step explanation:

175-(8+45÷3)x7 s

start with what's inside the parenthesis

(8+45÷3)  ⇒ (8+15) ⇒(23)

175-(23)x7

then do multiplication

23x7

161

175-161

14

final answer is 14

7 0
3 years ago
(50 points)There are x ducks in a pond. The number of swans in the pond is equal to the square root of the number of ducks. If t
RoseWind [281]

there are nine ducks and 3 swans

sqrt of 9 equals 3

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6 0
3 years ago
Read 2 more answers
7- square root of 3i
r-ruslan [8.4K]

Step-by-step explanation:

Any complex number is of the form: a + bi where a is real part and B is imaginary part.

Therefore, in given complex number: 7- \sqrt {3}i

7 is real part.

\sqrt {3} is imaginary part.

Hence, first two options are correct.

Last two options are incorrect because of the following reasons:

- \sqrt {3} is coefficient of i & not 7- \sqrt {3}

Given number is a difference of a real number and imaginary number & not a sum of a real number and imaginary number.

5 0
4 years ago
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3 years ago
While conducting experiments, a marine biologist selects water depths from a uniformly distributed collection that vary between
aleksandr82 [10.1K]

Answer:

The probability that a randomly selected depth is between 2.25 m and 5.00 m is 0.55.

Step-by-step explanation:

Let the random variable <em>X</em> denote the water depths.

As the variable water depths is continuous variable, the random variable <em>X</em> follows a continuous Uniform distribution with parameters <em>a</em> = 2.00 m and <em>b</em> = 7.00 m.

The probability density function of <em>X</em> is:

f_{X}(x)=\frac{1}{b-a};\ a

Compute the probability that a randomly selected depth is between 2.25 m and 5.00 m as follows:

P(2.25

                               =\frac{1}{5.00}\int\limits^{5.00}_{2.25} {1} \, dx\\\\=0.20\times [x]^{5.00}_{2.25} \\\\=0.20\times (5.00-2.25)\\\\=0.55

Thus, the probability that a randomly selected depth is between 2.25 m and 5.00 m is 0.55.

6 0
3 years ago
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