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Brums [2.3K]
4 years ago
15

(21 divided by 7 ) X 4

Mathematics
2 answers:
nikdorinn [45]4 years ago
8 0
21 divided by 7 = 3
so that means 3 x 4 is 12
serious [3.7K]4 years ago
3 0
First do the math inside the prentices which is 21 divided by 7 equals 3 then multiply 3 times 4 and you get 12. 
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Solve for x and y<br> (8y - 102)<br> (3x)<br> (2y + 6)
LuckyWell [14K]
I think x = 46 and y = 18. 8y - 102 is vertical to 2y + 6 so you would make them equal each other. You would solve and end up with 18. To find 3x, you would see that 8y - 102 is supplementary to it and they would have to equal 180. If you substitute 18 into 8y - 102 it would be 42. 180 - 42 is 138 so you would divide and do 138/3 which would leave you with 46.
8 0
4 years ago
Evaluate the expression 8^-2/3^-3
AlladinOne [14]
1/64. ÷ 1/27

1/64 × 27/1

= 27/64
4 0
4 years ago
Let f\left(x\right)=\frac{2}{x}f ( x ) = 2 x and g\left(x\right)=\frac{x}{x-1}g ( x ) = x x − 1. Find the domain of \left(\frac{
Black_prince [1.1K]

Answer:

The domain is  (-∞,0) ∪ (0,1) ∪ (1, +∞)

Step-by-step explanation:

In order to be able to compute f/g (x), we need that x is on the domain of f and in the domain of g.

f(x) = 2/x

In order to be able to compute f(x), we need that the denominator is different from 0, hence x≠0.

g(x) = x/x-1

In order to be able to compute g(x). we need x-1 to be different from 0, thus x≠1.

We also need the denominator of f/g (x) to be different from 0, hence g(x) ≠ 0. In order for g(x) = x/x-1 to be 0, the numerator x should be 0, as a result, we need x≠0 in order to have g(x) ≠ 0.

The domain of f/g (x) is every real nummber besides 0 and 1, in other words, it is (-∞,0) ∪ (0,1) ∪ (1, +∞).

6 0
4 years ago
Describe the sampling distribution of Phat. Assume the size of the Population is 25,000. N = 500 P = 0.4 Determine the Mean of t
PIT_PIT [208]

Answer:

0.022

Step-by-step explanation:

Given that :

Population size = 25000

n = 500 ; p = 0.4

Size of random sample (n) = 500

5% of population size : 0.05 * 25000 = 1250

Distribution is normally distributed since n < 5% of population size

Hence, the mean of the distribution = p = 0.4

Standard deviation = √((pq) /n)

q = 1 - p ; q = 1 - 0. 4 = 0.6

Standard deviation = √((0.4 * 0.6) /500)

Standard deviation = 0.0219089

= 0.022

5 0
3 years ago
After a work luncheon, Sara brought home 5/9 of a cheese
Hoochie [10]
5/9-2/12=?

9x8=72
5x8=40

12x6=72
2x6=12

40/72 - 12/72 = 28/72

28/4=7
72/4=18

28/72=7/18


8 0
3 years ago
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