Answer:
The number = 45
Step-by-step explanation:
Let the 10s digit = x
Let the units digit = y
10*x + y = 5(x + y) Start here: remove the brackets
10*x + y + 9 = 10y + x Subtract y and 10x from both sides
Using the first equation
10x + y = 5x + 5y
5x + y - 5y = 0
5x - 4y = 0
5x = 4y
y = 5/4x
From the second equation
9 = 9y - 9x
1 = y - x Substitute y = 5/4 x
1 = 5/4x - x
1 = 1/4 x
x = 4
y = 5/4 * 4
y = 5.
Hello,
Assume x the side of the square.
(x+7)²=4x²
==> ((x+7)-2x)((x+7)+2x)=0
==> (-x+7)(3x+7)=0
==> x=7 or x=-7/3 (to exclude since side must be positive)
Proof:
(7+7)²=196
4*49=196
0.0000075 = 7.5 x 10^6 --- Patients Blood
and it has to be between 0.0000006 and 0.000016
so <em>Yes</em> it is normal
Answer: it would take off would be $1.39 so you would subtract $6.95-$1.39 would be $5.56
Step-by-step explanation:
