Joey has to solve the system of equations using substitution. he has completed the work shown. what should be his next step?

The next step is calculate the value of x

Step-by-step explanation:

The next step is substitute the value of y in the equation

x=10-5y

To find the value of x

so

x=10-5(2)=0

The value of x=0

To find the value of x

x = 0

Step-by-step explanation:

Equation1

3x + 6y = 12

Equation2

x + 5y = 10

Till now Joey have wrote equation 2 in terms of x and substituted the value of x in Equation 1

In result of it we calculated value of y = 2

Now put this value of y in any equation from above

let say Equation 1

3x + 6(2) = 12

3x = 12- 12

3x = 0

x = 0/3

x = 0

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)

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step-by-step explanation:

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