Which placement of grouping symbols in the expression gives it a value of 6?
7 • 5 – 4 • 5 + 9
a.
7 • (5 – 4) • (5 + 9)
b.
7 • [(5 – 4) • 5] + 9
c.
7 • [5 – (4 • 5) + 9]
d.
(7 • 5) – [(4 • 5) + 9]

step-by-step explanation:

. your answer will contain x - and y -terms. (1 point) x ( ¿¿ 2 − 7 ) 2 +( y 2 − 9 ) 2 √ ¿ 12. what is the distance from the directrix (the crocodile river) to the point ( x , y )? write this equation. your answer will contain a y -term.

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents