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yaroslaw [1]
2 years ago
11

CAN SOMEONE PLS HELP ME I WILL MARK U BRAINLIEST

Mathematics
2 answers:
sukhopar [10]2 years ago
6 0

Answer:

x \geqslant  1

Step-by-step explanation:

The expression in the square root should be greater than or equal to zero, because square root of a negative number does not give a real number.

x  - 1 \geqslant 0 \\ x \geqslant  1

enot [183]2 years ago
3 0
Answer: this is the answer

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Which expressions are equivalent to, 8m + 6 *
guajiro [1.7K]

Answer:

4m + 4m + 6

3+3+5+3

10m+12+(-2m)-6

Step-by-step explanation:

Welcome

4 0
3 years ago
Find the value of f(3) for the function f(x)=-4(x+3) f(3)=
otez555 [7]

Answer:

  • -24

Step-by-step explanation:

<u>Given function</u>

  • f(x)= -4(x+3)

<u>To find</u>

  • f(3)=?

<u>Solution</u>

Substitute x with 3 in the equation to find f(3)

  • f(3) = -4(3+3) = -4*6 = -24
7 0
3 years ago
the probability that it will rain tomorrow is 0.85what is the probability that it will not rain tomorrow​
bija089 [108]

Answer:

.15

Step-by-step explanation:

Probability of Rain = x

Probabiliy of No Rain = y

Y=1-X

Y=1-0.85

Y=.15

4 0
2 years ago
It is known that the population variance equals 484. With a .95 probability, the sample size that needs to be taken if the desir
Ksju [112]

Answer:

We need a sample size of at least 75.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, we find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

The standard deviation is the square root of the variance. So:

\sigma = \sqrt{484} = 22

With a .95 probability, the sample size that needs to be taken if the desired margin of error is 5 or less is

We need a sample size of at least n, in which n is found when M = 5. So

M = z*\frac{\sigma}{\sqrt{n}}

5 = 1.96*\frac{22}{\sqrt{n}}

5\sqrt{n} = 43.12

\sqrt{n} = \frac{43.12}{5}

\sqrt{n} = 8.624

(\sqrt{n})^{2} = (8.624)^{2}

n = 74.4

We need a sample size of at least 75.

6 0
3 years ago
Read 2 more answers
Give brainlest on time limit pls help
inysia [295]

Answer:

336 sq un

Step-by-step explanation:

The area of a rhombus is pq/2 where p and q are the diagonals.

you have:

p = 12 + 12 = 24

q = 18 + 10 = 28

so the formula would be:

24 * 28 / 2 = 336 sq un

8 0
2 years ago
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