Answer:
y = x - 7
Step-by-step explanation:
Slope - intercept form: y = mx + b
2x - 2y = 14
-2y = -2x + 14
Divide the equation by (-2)
y = x - 7
3^3 = 3 * 3 * 3 = 27
4^3 = 4 * 4 * 4 = 64
5^3 = 5 * 5 * 5 = 125
6^3 = 6 * 6 * 6 = 216
Answer:
63
Step-by-step explanation:
Total groups: 21
number of students in each group: 3
total = 21 *3 =63
1) x^2=64 is the same as x=the root of 64 which gives us: (+-)8
2) here you must us pq-formel as:
5m^2-5m=60
5m^2-5m-60=0
(m^2-5m-60)/5=0
m^2-m-12=0
m=0,5(+-) the root of 0,25+12
m=0,5(+-)3,5
m1=0,5+3,5
m2=0,5-3,5
15) x^2=7x
x^2-7x=0 here there is two x, so:
x(x-7)=0
x1=0
x2=7
<span>
Here you can only use PQ formula in all the others, just as I did in the question number 2</span>
Y=2x-3 Y=2x-3
X+Y=18 X+Y(2x-3)=18
X+2x=18+3
3x=21
x=21/3 (or 21:3)
x=7