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horrorfan [7]
3 years ago
8

How to solve this question

Mathematics
1 answer:
Fiesta28 [93]3 years ago
4 0
7 = 5y - 3
add 3 to both sides
10 = 5y
divide both sides by 5
2 = y
-1 = 5y - 3
add 3 to both sides
2 = 5y
divide bothe sides by 5
2/5 = y
-3 = 5y - 3
add 3 to both sides
0 = 5y
divide both sides by 5
0 = y
6 = 5y - 3
add 3 to both sides
9 = 5y
divide both sides by 5
9/5 = y
-8 = 5y - 3
add 3 to both sides
-5 = 5y
divide both sides by 5
-1 = y
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A bird traveled 4 miles north before stopping to rest. The bird then flew 2,640 yards south in search of food. Finally, it flew
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7 and 1/2 mile because 2,640=1.5 miles
4-1.5=2.5+5=7.5
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3 years ago
40 - 10 + 20
marin [14]

Answer:

The answer is 50

Step-by-step explanation:

40-10=30

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4 years ago
In order to estimate the difference between the average hourly wages of employees of two branches of a department store, the fol
Vinil7 [7]

Answer:

4.692 to 7.308

Step-by-step explanation:

Given :

n1 = 25 ; n2 = 20 ;

Mean x1 = $12 ; mean x2 = $6

Standard deviation, s1 = 3 ; s2 = 1

Confidence interval :

(x1 - x2) ± t*√(s1²/n1) + (s2²/n2)

x1 - x2 = (12 - 6) = 6

√(s1²/n1) + (s2²/n2) = √(3²/25) + (1²/20) = 0.640

Degree of freedom :

((s1²/n1) + (s2²/n2))² / (s1²/n1)²/n1-1 + (s2²/n2)²/n2-1

Numerator = 0.1681

Denominator = 0.0054 + 0.0001315 = 0.0055315

Degree of freedom = 0.1681 / 0.0055315 = 30.38 = 30

Tcritical at 0.05, df = 30 = 2.042272

Hence ;

6 ± 2.042272(0.640)

6 ± 1.30705408

Lower boundary = 6 - 1.30705408 = 4.69294592

Upper boundary = 6 + 1.30705408 = 7.30705408

(4.693 ; 7.307)

3 0
3 years ago
What are some good ways to study / pay attention when you struggle with the subject?
oee [108]
1) Make yourself focus by telling yourself you’ll treat yourself to something if you focus.
2) have a positive attitude towards it, it gets easier.
3) practice/review a little everyday; it’ll help even if it’s 5 min a day.
4) ask friends/fam/teacher for help if you’re really having a hard time
5)make sure you are not hungry
6) play some light classical music
3 0
3 years ago
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