Answer:
1) m = negative StartFraction 10 over 4 EndFraction
2) m = negative five-halves
3) m = 
Step-by-step explanation:
<u>The given equation is:</u>
=> 
Subtracting 3/4 to both sides
=> m =
=> m = 
=> m = 
1 ft = 12 inches....so 10 ft = (10 * 12) = 120 inches
each strip of wall paper is 20 inches...
so 120/20 = 6 strips of wall paper are required <==
Answer: f(x) = (x + 3)(x – 7)
Step-by-step explanation: Use "standard form" of the function and insert values given: vertex (2,-25) intercept point (7,0)
f(x) = a(x-h)² + k from vertex, h is 2 y is -25 from intercept, x is 7 f(x) is 0
to find a, 0 = a(7-2)² +(-25) 0 = a(7-2)² -25 add 25 to both sides
25 = a(5)² 25 = 25a 25/25 = a 1=a (seems useless but verifies implied "a"coefficient is 1)
f(x) = a(x-h)² + k solve to get the quadratic form
f(x) = (x-2)² -25 (x - 2)² is x² -4x +4
f(x) = x² -4x +4 -25 simplify
f(x) = x² -4x - 21 then factor
f(x) = (x + 3)(x - 7)
To decrease it by 3% we need to fine 97% of it and 97% is the same as 0.97
16870 times 0.97=16363.9
16870 decreased by 3% is 16363.9
I hope I've helped!
