At the market, 5 light bulbs cost $9.85.
How much do 7 light bulbs cost?

$13.79

Step-by-step explanation:

Divide the cost by the number of light bulbs.

$9.85 ÷ 5 bulbs = $1.97 each

Multiply the cost of each bulb(1.97) by each of the new bulbs.

$1.97 x 7 bulbs = $13.79

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.