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IgorLugansk [536]
3 years ago
7

|x−y+z|, if x=3; y=−2; z=−6

Mathematics
1 answer:
Finger [1]3 years ago
3 0

Answer:

1

Step-by-step explanation:

Try the question without the absolute value brackets first.

Then it would be 3+2-6

Since it states "x-y" and y is -2, then it would be 3+2 since a negative times a negative becomes a positive

Same thing for "z", instead of +6 it would be -6 because a negative times a positive is still a negative

Now, 3+2-6 is -1 but MAKE SURE to put the absolute value brackets back. Making the answer a positive number. Therefore, it would be 1

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a teacher is experimenting with computer- based instruction. In which situation could the teacher use a hypothesis test for a di
Ilia_Sergeevich [38]

Answer:

(i) She gives each student a pretest. Then she teaches a lesson using a computer program. Afterwards, she gives each student a posttest. The teacher wants to see if the difference in scores will show an improvement.

Step-by- Step

The situation is a case of matched or paired samples since the samples are dependent. The two measurements are drawn from the same pair of individuals The parameter that is tested using matched pairs is the population mean and this is what teacher intends to use a hypothesis test for.

8 0
3 years ago
An easy question all wrong or unhelpful or no-work answers will be reported.
miss Akunina [59]
Elimination:

7x - 3y = 20
5x + 3y = 16
(add)
12x = 36
÷ 12
x = 3

(5 × 3) + 3y = 16
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- 15
3y = 1
÷ 3
y = 1/3

Substitution:

5x + 3y = 16
- 3y
5x = 16 - 3y
÷ 5
x = 3.2 - 0.6y

5(3.2 - 0.6y) + 3y = 16
16 - 3y + 3y = 16
16  = 16
- 16
6y = 0
÷ 6
y = 0

Sorry the substitution messed up for some reason, I'll fix it after I've answered the other question

6 0
3 years ago
2/3 (x + 7) = 10 A) 22 B) 8 C)- 1 3 D 41 3 help me quick plz
otez555 [7]

Answer:

D

Step-by-step explanation:

D BECAUSE IT IS D

4 0
3 years ago
(x+2 3/13 ) - 1 7/26 =4 5/39
ser-zykov [4K]

x+3-1.26923+4.12821 so if I am wrong it took me a while to work this out

3 0
3 years ago
△ABC ~ △DEF What is the scale factor between them?
VMariaS [17]
2/3

6x = 4
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The scale factor can be determined by using similar sides
3 0
3 years ago
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