The graph of which function is decreasing over the interval (–4, ∞)?
2 answers:
Step-by-step explanation:
ok, logic
all of them are parabolas
1st and 3rd are opening up, so they defenitely increase, so no
decraseing
the vertex hs to be be at x=-4
y=a(x-h)^2+k
h has to be -4
y=a(x+4)^2+k
the answer is 2nd one or f(x)=-(x+4)^2+4
Answer:
B
Step-by-step explanation:
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Answer:
-1 and 10
Step-by-step explanation:
x2-9x-10
=x2-10x+x-10=0
=x(x-10)+1(x-10)
=(x+1)(x-10)
=x=-1,10
Answer:
y = 1/2x + 3
Step-by-step explanation:
when X = 0, y = 3
when y = 0, 0 = kx + 3
k = 1/2
Answer:
Discount:
$6.30
Final Price:
$35.70
Step-by-step explanation:
Discount = Original Price x Discount %/100
Discount = 42 × 15/100
Discount = 42 x 0.15
You save = $6.30
Answer:
x = (cy+b)/a
Step-by-step explanation:
ax-b=cy
Add b to each side
ax-b+b=cy+b
ax = cy +b
Divide each side by a
ax/a = (cy+b)/a
x = (cy+b)/a
Answer:
60
Step-by-step explanation:
0.2 times 300 is 60
