Let’s substitute x values of the minimum point of the graph into each equation and see which equation gives the correct equation ;
x = -3
y = 2
1. y = (x+3)^2-2
= (-3+3) ^2 -2
= 0^2 -2
= -2
Therefore first equation is wrong
2. y = (x-3)^2 -2
= (-3-3)^2 -2
y = 36-2
y = 34
Since y isn’t 34 the second equation is wrong
3. y = (x+3)^2 +2
= (-3+3)^2 +2
= 0^2 +2
= 2
Since y =2 the third equation is correct
Therefore third equation is correct
30 is 60% of what number?
30/60
30 ÷ 60 = 0.5
0.5 × 100 = 50
30 is 60% of 50.
This topic is place value. The hundredths place is the second number from the decimal point (from the picture, I think it says 5?).
Here is a quick order of place value:
Thousands
Hundreds
Tens
Units
(Decimal point)
Tenths
Hundredths
Thosandths
The cross of the position vectors is
.. [5, 2, 2] × [6, -1, 1] = [4, 7, -17] . . . . . the normal vector of the desired plane
Since the origin is a point in the plane, its equation can be written as
.. 4x +7y -17z = 0
