Answer:
A
Step-by-step explanation:
f(x) = 7x² - 15x + 2
A) f(1) = 7*1² - 15*1 +2 = - 6
f(1.5) = 7*(1.5)² -15*1.5 + 2 = - 4.75
B) f(2.2) = 7*(2.2)²-15*(2.2)+2 = 2.28
C) f(1) = 7*1² - 15*1 +2 = - 6
f(1) = 7*2² - 15*2 +2 = 0
D) not for all real numbers because we already have
f(2.2) = 7*(2.2)²-15*(2.2)+2 = 2.28 that is positive.
The domain is negative infinity to positive infinity and the range is 8.
Answer:
Please see attached picture for full solution.
Sorry, I'm not sure how to do Q7 :(
<span>One T-shirt is m dollars. The number of T-shirts is n. Amy bought 27 T-shirts.
27n = m, so n = m/27.</span><span>
Hope that helps! (:</span>
Answer:
a) P(X=2)= 0.29
b) P(X<2)= 0.59
c) P(X≤2)= 0.88
d) P(X>2)= 0.12
e) P(X=1 or X=4)= 0.24
f) P(1≤X≤4)= 0.59
Step-by-step explanation:
a) P(X=2)= 1 - P(X=0) - P(X=1) - P(X=3) - P(X=4)= 1-0.41-0.18-0.06-0.06= 0.29
b) P(X<2)= P(X=0) + P(X=1)= 0.41 + 0.18 = 0.59
c) P(X≤2)= P(X=0) + P(X=1) + P(X=2)=0.41+0.18+0.29= 0.88
d) P(X>2)=P(X=3) + P(X=4)=0.06+0.06= 0.12
e) P(X=1 or X=4)=P(X=1 ∪ X=4) = P(X=1) + P(X=4)=0.18+0.06= 0.24
f) P(1≤X≤4)=P(X=1) + P(X=2) + P(X=3) + P(X=4)=0.18+0.29+0.06+0.06= 0.59
