It’s an isosceles triangle, so both the legs will be congruent, and then we can use the Pythagorean thrm
8^2+8^2=x^2
64+64=x^2
128=x^2 *square root both sides*
x=11.3
So the answer would be C
Answer:
11.5
Step-by-step explanation:
Frank paid a total of 24.2 for the 2 CDs, so, for each CD, he paid the total value divided by two:
Price of each CD = 24.2 / 2 = 12.1
Each CD had a tax of 0.6, so, to calculate the price of each CD before tax, we just subtract the price of each CD by the value of the tax for each CD:
Price of each CD before tax = 12.1 - 0.6 = 11.5
The price of each CD before tax is 11.5
The quadratic formula is =(-b+-sqrt(b^2-4ac))/2a
as you notice the term under the square root is b^2-4ac if it is postive then the equation clearly will have two real soultions if it is negative then the equation will have two imaginary soultion if it is zero then the the equation will have one soultion
so let us calculate b^2-4ac for our given equation
x^2=4x-5 so let us write it in general form which is ax^2+bx+c=0
subtracting 4x from both sides
x^2-4x=-5
adding 5 to both sides
x^2-4x+5=0
a=1,b=-4,c=5
b^2-4ac=(-4)^2-4(1)(5)=16-20=-4
which means the equation has two imaginary soultions
Answer:
10
Step-by-step explanation: substitute 2 for all the x’s and add.
