What is the value of y in the system of equations?
5x + y = -1
y = 6x + 10

y = 4

Step-by-step explanation:

5x + y = -1

y = -1 - 5x

y = 6x + 10

6x + 10 = -1 - 5x

11x = -11

x = -1

y = 6x + 10 = 6(-1) + 10 = -6 + 10 = 4

wholesale price is the initial price before markup. retail price comes after the markup.

a price of 8 bucks that's marked up by 100%   is

formula: initial price + (percent markup in fraction/decimal)(initial price)

8+(1)(8)

8+8

16

retail price is $16.

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)