40% of the jerseys are medium sized,
That is because to find the percentage do,
20/50 = 0.40
This shows that 40% of the jerseys are medium
You can also do this:
20 to 50 (Ratio of medium to total jersey)
Multiply by 2 to both sides to get 100 for the total jerseys,
40 to 100
This also shows that 40% of the jerseys are medium sized
For number one A we need to multiply 5x5 because exponents make you multiply the base number by the exponent the ammount of times the exponest value is. This would give is 25-6 which equals 19
number 1 B we need to add the 8 and the 3 to give us eleven over five. thats the simplest answer to this question
2a we need to multiply the 5 into the parenthesis
then we add. The answer would be 28
for 2b the answer would be 9 2/9
ill let you solve the rest. hope this helped. dont forget to leave a heart give it 5 stars and make it the brainliest answer!!
The given function is
f(x) = ![8x^{2}+2x-5](https://tex.z-dn.net/?f=%208x%5E%7B2%7D%2B2x-5%20)
Comparing with
![ax^{2}+bx+c](https://tex.z-dn.net/?f=%20ax%5E%7B2%7D%2Bbx%2Bc%20)
We get
a = 8, b = 2 & c = -5
Now if (h,k) is the vertex
then h =![-\frac{b}{2a}=-\frac{2}{2(8)}=-\frac{1}{8}](https://tex.z-dn.net/?f=%20%20-%5Cfrac%7Bb%7D%7B2a%7D%3D-%5Cfrac%7B2%7D%7B2%288%29%7D%3D-%5Cfrac%7B1%7D%7B8%7D%20)
Substituting the value of h in place of x in the function we get
k=![8(-\frac{1}{8})^2+2(-\frac{1}{8})-5 = -\frac{41}{8}](https://tex.z-dn.net/?f=%208%28-%5Cfrac%7B1%7D%7B8%7D%29%5E2%2B2%28-%5Cfrac%7B1%7D%7B8%7D%29-5%20%3D%20-%5Cfrac%7B41%7D%7B8%7D%20)
Now the vertex form of a quadratic equation is
f(x)= a(x-h)² + k
Substituting the values of a, h & k we get
f(x) = 8![8(x-(-\frac{1}{8}))^2+(-\frac{41}{8})](https://tex.z-dn.net/?f=%208%28x-%28-%5Cfrac%7B1%7D%7B8%7D%29%29%5E2%2B%28-%5Cfrac%7B41%7D%7B8%7D%29%20)
The vertex form of f(x) = 8x² +2x-5 is
f(x) = ![8(x+\frac{1}{8})^2-\frac{41}{8}](https://tex.z-dn.net/?f=%208%28x%2B%5Cfrac%7B1%7D%7B8%7D%29%5E2-%5Cfrac%7B41%7D%7B8%7D%20)
Answer