Answer:
y = 3x² - 42x + 144
Step-by-step explanation:
The equation of a parabola in vertex form is
y = a(x - h)² + k
where (h, k) are the coordinates of the vertex and a is a multiplier
here (h, k) = (7, - 3), thus
y = a(x - 7)² - 3
To find a substitute (9, 9) into the equation
9 = 4a - 3 ( add 3 to both sides )
12 = 4a ( divide both sides by 4 )
a = 3
y = 3(x - 7)² - 3 ← in vertex form
Expand factor and simplify
y = 3(x² - 14x + 49) - 3
= 3x² - 42x + 147 - 3
= 3x² - 42x + 144 ← in standard form
Answer:
d 2
Step-by-step explanation:
x/7 +13/14 = 17/14
double the first one so all the denominators are the same
2x/14+13/14=17/14
then subtract the second fraction from the thrid
2x/14=4/14
then we can divide by two so we are back to 7 as the demoninator
x/7=2/7
Divide 3945 by 20 to see how many full bags have to be bought then if you need part of a bag you have to buy one extra 193 full bags 3940 pounds and one extra bag for the other 5 pounds
Answer: 44.44
Step-by-step explanation: Order of operations - PEMDAS (parentheses, exponents, multiplication, division, addition, subtraction)
Parentheses: (112-32) = 80
Multiplication: 5(80) = 400
Division:400/9 = 44.4444444444
