Hopes this helps if right please mark as brainlist:
Answer: -12x^2 + 15x
Answer:
4 and 9
Step-by-step explanation:
let their ages be x and x - 5, then in 4 years their ages will be
x + 4 and x - 5 + 4 = x - 1 , and the product is 104, thus
(x + 4)(x - 1) = 104 ← expand factors on left using FOIL
x² + 3x - 4 = 104 ( subtract 104 from both sides )
x² + 3x - 108 = 0 ← in standard form
(x + 12)(x - 9) = 0 ← in factored form
Equate each factor to zero and solve for x
x + 12 = 0 ⇒ x = - 12
x - 9 = 0 ⇒ x = 9
However, x > 0 ⇒ x = 9
Thus
Their present ages are 9 and 9 - 5 = 4
Answer:
Question 2.) 16
144÷9=16
Question 3.) 16
16÷12=1.33... and all the others equal 1.33... as well
Question 4.) 20
20÷16=1.25 and all tho others equal 1.25 as well
Question 5.)12
8÷12=0.66... and all the others equal 0.66.... as well
I hope this is good enough for you:
