Numbers are x and y
x is 5 more than y
x=5+y
product is -3
xy=-3
solve
sub 5+y for x since x=5+y
(5+y)y=-3
5y+y^2=-3
add 3 to both sides
y^2+5y+3=0
use quadratic formula where
ay^2+by+c=0
y=
a=1
b=5
c=3
y=
y=
y=
y=
or
the second number is 5 more or 10/2 more
add 10/2 to each
x=
or
the numbers are
and
or
and
aprox
the numbers are
-0.697224 and 5.967224 or
-4.302775 and 0.697224
Answer:
1.05 ± 0.05 lbs
Step-by-step explanation:
Hi!
We can calculate this interval with the z-score of the 90% which is (by convention) 1.645
The interval is calculated as follows:
where x_m is the mean, σ the standar deviation and n is the number of samples:
replacing these values we get:
*rounded to the first decimal*
1.05 ± 0.05
To express the equation in a point-slope form, obtain first the slope of the line between the points. The slope, m, of this line is,
(y2 - y1)/(x2 - x1) = (8 - 0)/(2--2) = 2
The point-slope form of the line is generally expressed as
y - y2 = m (x - x2)
Thus, in this given the point-slope form is,
y - 8 = 2 (x - 2)
M^2-2m-5 IS THE ANSWER :D