Answer:
25.12
Step-by-step explanation:
You would multiply 3.14 times 8 to get 2512. From there you can notice that there are 2 points after the decimal place so you need to move it over 2 places. Your final answer would be 25.12.
7. 4x+y=8 ----- first equation
(+)
-3x-y=0
_______
x = 8 ---- second equation
substitude second equation into first equation
4(8) + y = 8
32 + y = 8
y = 24
8. 2x+5y=20 ---- first equation
(-)
2x-5y =3
________
10y = 17
y = 17/10 ---- second equation
substitude second equation into first equation
2x + 5(17/10) = 20
2x + 17/2 = 20
4x + 17 = 40
4x = 23
x = 23/4
9. 3x+2y=-10 (×2) ---- first equation
2x-5y=3 (×3)
6x + 4y = - 20
(-)
6x - 15y = 9
___________
19y = - 29
y = - 29/19 ---- second equation
substitude second equation into first equation
3x + 2(-29/19) = - 10
3x - 58/19 = - 10
3x = - 132/19
x = - 44/19
25.7 is 18.23% of 141.
Step-by-step explanation:
Let,
The percent be x.
Therefore,
x% of 141 = 25.7
Changing percent into 100 and multiplying x with 141.

1.41x = 25.7
Dividing both sides by 1.41

25.7 is 18.23% of 141.
Keywords: percentage, division
Learn more about division at:
#LearnwithBrainly
Answer:
g(x) not negitive
Step-by-step explanation: