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Mariana [72]
3 years ago
11

Which mathematical property is demonstrated?

Mathematics
2 answers:
RSB [31]3 years ago
5 0

Answer:

The commutative property states that you can rearrange the order of the numbers and get the same result. The commutative property states that you can rearrange the order of the numbers and get the same result. The addition properties are the exact same, but replace multiply with add. Your answer is D.

Step-by-step explanation:

All the problem is doing is switching the numbers to different sides of the equation. You will still get the same answer.

dedylja [7]3 years ago
4 0

Answer:

d

Step-by-step explanation:

associative property of addition

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What is the answer is think it is a but I don't know. plz help.
Papessa [141]
Hi there!

The answer is actually D.

Since both the numerator and the denominator multiplied by 3 is 3/9, the answer would be 9.

-1 × 3 = -3
-3 × 3 = -9

Since a negative number times a positive number is a negative number, the correct answer would be D.

Hope this helps!
7 0
2 years ago
A recent survey showed that among 100 randomly selected college seniors, 20 plan to attend graduate school and 80 do not. Determ
Hunter-Best [27]

Answer:

The 68% confidence interval for the population proportion of college seniors who plan to attend graduate school is (0.16, 0.24).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

A recent survey showed that among 100 randomly selected college seniors, 20 plan to attend graduate school and 80 do not.

This means that n = 100, \pi = \frac{20}{100} = 0.2

68% confidence level

So \alpha = 0.32, z is the value of Z that has a pvalue of 1 - \frac{0.32}{2} = 0.84, so Z = 0.995.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2 - 0.995\sqrt{\frac{0.2*0.8}{100}} = 0.16

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2 + 0.995\sqrt{\frac{0.2*0.8}{100}} = 0.24

The 68% confidence interval for the population proportion of college seniors who plan to attend graduate school is (0.16, 0.24).

4 0
3 years ago
At what rates did she invest?<br> $1400 invested at ____%<br> $900 invested at ____%
Mars2501 [29]

9514 1404 393

Answer:

  • $1400 at 8%
  • $900 at 10%

Step-by-step explanation:

The 1-year interest is simply the invested amount times the interest rate.

Let r represent the lower interest rate. Then r+0.02 is the higher rate, and the total interest earned is ...

  1400r + 900(r +.02) = 202

  2300r +18 = 202 . . . . . . . . . .simplify

  2300r = 184 . . . . . . . . . .subtract 18

  r = 184/2300 = 0.08 = 8% . . . . . . divide by the coefficient of r

$1400 was invested at 8%.

$900 was invested at 10%.

5 0
3 years ago
Read 2 more answers
Please solve the following equation. x-6x=56
strojnjashka [21]
X-6x=56
-5x=56/:(-5)
x=-56/5
x=-11 1/5
7 0
3 years ago
Read 2 more answers
M (18, 24) is the midpoint of segment JL with J (- 4, - 2). What are the coordinates for L?
faust18 [17]

Answer:

mid point (x,y) = M (18, 24)

let J (- 4, - 2) be ( x1, y1)

     L(a,b) be (x2,y2)

using midpoint formula

(x,y) = [(x1+x2)/2, (y1 + y2)/2]

or, (18, 24) = [(-4+a)/2, (-2+b)/2]

comparing corresponding element we get

18 = (-4+a)/2                 24 =(-2+b)/2

or 36 = -4+ a            or 48 = -2 +b

or a = 40                  or b= 50

L(40,50)

5 0
3 years ago
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