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SSSSS [86.1K]
3 years ago
12

15 points!!

Mathematics
1 answer:
Dima020 [189]3 years ago
4 0
From -2x+4y = -2, we must find 2x = 10. This is done by multiplying x - y = 3 by 4 to get 4x - 4y = 12, and adding the -2x + 4y = -2.
To get system B, the (second) equation in system A was replaced by the sum of that equation and the (first) equation multiplied by (4). THe solution to system B (is) the same as the solution to system A.
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On Saturday, the fruit and juice bar was selling 27 glasses of fruit punch an hour. By 7 p.m., they had sold 243 glasses. If the
padilas [110]

Answer: 3 hours

Step-by-step explanation:

the answer this can be solved by the function:

324 = 27x + 243

-243          -243

27x = 81

/27     /27

x = 3 hours past 7.

3 0
3 years ago
Judah's family wants to ride the bumper boats at a water park. There are 4 children (c) and 2 adults 9 (a) in Judah's family. Th
zhannawk [14.2K]

Answer:

Yes, the boats are safe to ride.

Step-by-step explanation:

40 (4) + 12 (2) ≤ 500

160 + 24 ≤ 500

184  ≤ 500

184 is less than 500.

because I was not sure if you had 9 adults instead of 2, this is the answer:

40 (4) + 12 (9) ≤ 500

160 + 108 ≤ 500

268 ≤ 500

268 is less than 500

3 0
3 years ago
Read 2 more answers
A college student is interested in testing whether business majors or liberal arts majors are better at trivia. The student give
attashe74 [19]

Answer:

There is no significant difference between the two averages at 5% level

Step-by-step explanation:

Given that a a college student is interested in testing whether business majors or liberal arts majors are better at trivia.

The student gives a trivia quiz to a random sample of 30 business school majors and finds the sample’s average test score is 86. He gives the same quiz to 30 randomly selected liberal arts majors and finds the sample’s average quiz score is 89

Thus he has done a hypothesis testing for comparison of two means of different subjects.  n =30

H_0: Mean of business majors = Mean of liberal arts majos\\H_a:Mean of business majors \neq  Mean of liberal arts majos

Since which is better is not claimed we use two tailed test here

We find that p value = 0.0524 >5% our alpha

Since p >alpha, we find that there is no significant difference between the averages of these two groups and null hypothesis is accepted

4 0
3 years ago
Please help I'll give you brainliest
PSYCHO15rus [73]

Answer:

Equation 1: No solution

Equation 2: Infinity

Equation 3: One solution

Equation 4: Infinity

Equation 5: No solution

Hope this helps you. Do mark my answer as brainly. Thanks

7 0
3 years ago
It also detects if you are right or wrong
Sindrei [870]

Answer:

I think A

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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