Answer:
n= 4
Step-by-step explanation:
3 multiplied by n is 3n.
3 multiplied by -5 is -15.
so 3n-15= 7-2(n+1)
7-2(n+1) is -2 multiplied by n is -2n and -2 multiplied by 1 is -2.
3n-15=7-2n-2
then move the variables to one side and numbers to the one side.
3n+2n=15+7-2
*If you are moving across the equation the symbols change. Like negative to positive. Division to multiplication.
so 5n=22-2
5n=20
5 multiplied by 4 is 20 so n is going to be 4.
N=4
= 23, 561. 945 cm
Step-by-step explanation:
If the fan does 300 rev per min;
300 rev : 60 sec
x rev : 15 sec
x = 300 * 15 / 60
x = 75 rev
One revolution of the point on the blade is equal to the circumference of the circle with a radius of 10 cm. Therefore;
2πr
2* 3.14 * 10
= 62.83 cm
75 revolution will be;
75 * 62.83 cm
= 4712.39 cm
x=8
y=31
I just plugged in a bunch of numbers until I got it
<span>2x+4(x+1/2+7) =
2x + 4x + 4/2 + 28 =
6x + 2 + 28 =
6x = - 30
x = -30/6
x = - 5 </span>
Answer:
35
Step-by-step explanation:
Thanks for the points.
