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Tamiku [17]
2 years ago
13

Substitution would be the best method for solving which system?

Mathematics
2 answers:
natali 33 [55]2 years ago
8 0

Answer:

Assuming its asking which is the easiest one to use substitution its the last one: y= 2x : x + y = 28

Step-by-step explanation:

Because y and x are already one opposite sides you can substitute y in the 2nd equation with 2x. So you'll get 3x = 28 so x = 9.333333334. Then you plug your answer for x in the original equation to get y = 18.666666667

Pepsi [2]2 years ago
5 0

Answer:

The last one

Step-by-step explanation:

Because it tells you what y is

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HIE
Nady [450]

Answer:

y = 3x-2

Step-by-step explanation:

7 0
3 years ago
The length of a rectangle is 24 units. Can the perimeter x of the rectangle be 60 units when its width y is 11 units?
olganol [36]
No the rectangle cannot have x = 60 and y = 11 because x = 48 + 2y
4 0
3 years ago
Read 2 more answers
Am I on the right track? Or am I doing something wrong?
galben [10]
It looks good to me
6 0
3 years ago
8,4,6,2 witch is not an composite number
liberstina [14]

Composite numbers are numbers that have more than 2 factors. With that being said, your answer would be 2.

4 is a composite number: 1, 2, 4

6 is a composite number: 1, 2, 3, 6

8 is a composite number: 1, 2, 4, 8

2 is a prime number: 1 and 2

2 is a prime number, not a composite number.

7 0
2 years ago
Female athletes at the University of Colorado, Boulder, have a long-term graduation rate of 67% (Source: Chronicle of Higher Edu
VLD [36.1K]

Answer:

Yes, we can assume that the percent of female athletes graduating from the University of Colorado is less than 67%.

Step-by-step explanation:

We need to find p-value first:

z statistic = (p⁻ - p0) / √[p0 x (1 - p0) / n]

p⁻ = X / n = 21 / 38 = 0.5526316

the alternate hypothesis states that p-value must be under the normal curve, i.e. the percent of female athletes graduating remains at 67% 

H1: p < 0.67 

z = (0.5526316 - 0.67) / √[0.67 x (1 - 0.67) / 38] = -0.1173684 / 0.076278575

z = -1.538681 

using a p-value calculator for  z = -1.538681, confidence level of 5%

p-value = .062024, not significant

Since p-value is not significant, we must reject the alternate hypothesis and retain the null hypothesis.

3 0
3 years ago
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