Answer:
x= 4 and y= 11
Step-by-step explanation:
The problem to solve is:
y = 2x + 3 (equation 1)
y = 3x - 1 (equation 2)
Since y = 3x - 1 Solve x from equalution 1
3x - 1 = 2x + 3
3x - 2x = 3 + 1
x = 4
Since x is 4, solve for y
y = 3x - 1
y = 3(4) - 1
y = 12 -1
y = 11
x =4 and y =7
Answer:
7.5
Step-by-step explanation:
(15/5)-0.4-0.4-0.4-0.4-0.4-0.4-0.4-0.2=0
Step-by-step explanation:
so, that means we want to find the time t (days) after which N = No/2
because "half-life" means the amount of time until half of the substance has disappeared (or transformed into something else).
so, we have
No/2 = No × e^(-0.1481×t)
No = 2× No × e^(-0.1481×t)
1 = 2×e^(‐0.1481×t)
1/2 = 0.5 = e^(-0.1481×t)
ln(0.5) = -0.1481×t
t = ln(0.5)/-0.1481 = 4.680264555... ≈ 4.7 days
