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Scorpion4ik [409]
3 years ago
13

What is the solution to the system of equations below?

Mathematics
1 answer:
lisov135 [29]3 years ago
5 0
Its either -1,2 or 1,2
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To better understand the financial burden students are faced with each term, the statistics department would like to know how mu
Semmy [17]

Answer:

Answer:

a).

The amount spent on school materials for each term of all ST201students

b).

a).

It is not a random sample. This looks like a convenience sampling and there is sampling bias. This sample is not representative of the entire population. Since it is not a random sample it is not appropriate to generalize the results to all students.

b).

The sample size is 80 which is greater than 30. It is large enough to assume normal distribution according to central limit theorem.

c).

mean: $617

z critical value at 95%: 1.96

standard error = σ/sqrt(n) =500/sqrt(80) = 55.9017

lower limit= mean-1.96*se = 617-1.96*55.9017=507.43

upper limit= mean+1.96*se = 617+1.96*55.9017=726.57

d).

The amount spent on school materials for each term for the 80 ST201students is $617. We are 95% confident that amount spent on school materials for each term of all ST201students falls in the interval ($507.43, $726.57).

Step-by-step explanation:

3 0
3 years ago
Solve for x<br> 7x−4≤6<br><br> Give your answer as an improper fraction in its simplest form.
pashok25 [27]

Answer:

X≤10/7

Step-by-step explanation:

7x-4≤6

add 4 both sides

7x-4+4≤6+4

7x≤10

divide 7 both sides

7x/7≤10/7

x≤10/7

hope it's helpful ❤❤❤❤

THANK YOU.

6 0
3 years ago
Change each algebraic expression to a verbal expression.<br><br> 1. A+B = 10<br><br> 2. 4x - y = a
Darina [25.2K]

Answer:

1. A letter, A, added to a letter, B, equals ten.

2. A letter, x, which is multiplied by 4, then has a number, y, subtracted from it to equal a letter, a.

If you try write these out, I'm sure you'd get the algebraic expression given.

4 0
3 years ago
A ball has a circumference of 9.42 cm what is the diameter ​
lyudmila [28]

Answer:

2.998

Step-by-step explanation:

Area for the circumference of a circle: C=2pir

9.42=2pir

r=1.499

d=2r

d=2.998

6 0
3 years ago
​Aki's Bicycle Designs has determined that when x hundred bicycles are​ built, the average cost per bicycle is given by​ C(x)=0.
Semmy [17]

Answer:

<u>maximum of 2 bicycle</u>

Step-by-step explanation:

Given the average cost per bicycle modeled by the equation

C(x) = 0.5x^2-1.5x+4.83

C(x) is in hundreds of dollars

x is number of bicycle

The number of bicycle that will minimize the cost occurs when dC/dx = 0

dC/dx = 2(0.5)x - 1.5

dC/dx = x - 1.5

Since dC/dx = 0

0 = x - 1.5

x = 0+1.5x = 1.5

Hence the shop should  buy <u>maximum of 2 bicycle</u> to minimize the cost

8 0
3 years ago
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