Answer:
Step-by-step explanation:
Hi there!
This equation is written in the form 
. First, use partial factoring:
For x^2-x, the <em>b</em> value is -1 in 
. To complete the square, take the square of half of 1 and add it in the parentheses as the <em>c</em> value:
However, when adding values to one side of the equation, we must to the same to the other side:
Complete the square:
Move 20 to the other side
I hope this helps!
No they are not equivalent
Surface area SA:
Circumference C:
dividing this you get
and
Now let's input the radius
into the Surface area formula...
None. there are always 2 acute angles in a 90 degree triangle
One apple cost $1.8 while the money that Philip has is $24.90
Let x represent the cost of each apple and y represent the money he has presently.
He can buy 15 apples if he had $2.10 more money than he has now, hence:
15x = y + 2.1
15x - y = 2.1 (1)
Also, if he buys 12 apples, how would have $3.30 left of the money he has now. Hence:
12x + 3.3 = y
12x - y = -3.3 (2)
Solving equations 1 and 2 gives:
x = 1.8, y = 24.9
Hence one apple cost $1.8 while the money that Philip has is $24.90
Find out more at: brainly.com/question/16763389
