#7 is the easiest one.
a + bi = -9 + 4i
see the expression on either side matches up so..
a = -9 and b = 4
Answer:
0.80
Step-by-step explanation:
The z-score is found from the formula ...
Z = (X -μ)/σ
Z = (77 -73)/5 = 4/5 = 0.80
Jennifer's Z-score was 0.80.
Step-by-step explanation:


= 2π(14).(14+29)
=2π .14.43


=3784 mm²
Answer:
28
Step-by-step explanation:
4x5=20
4x2=8
20+28=28