A.) After 5 days t=5 so:
b.) Since we want to know how much time 40 grams will decay to 10 grams we will let A(t)=10 so:
10 grams will be left after 15.93 days.
Answer:
36
Step-by-step explanation:
90 x 0.4 = 36
0.4 = 2/5
I think it might be c) 17cm because it says round to nearest 10
-6- -2n=3n -(6+5)
combine like terms
-6 +2n = 3n -11
subtract 2n from each side
-6 = n-11
add 11 to each side
-6 +11 = n
5 =n
Answer:
x = 12
General Formulas and Concepts:
<u>Pre-Algebra</u>
- Order of Operations: BPEMDAS
- Equality Properties
Step-by-step explanation:
<u>Step 1: Define equation</u>
-2(x - 4) = -16
<u>Step 2: Solve for </u><em><u>x</u></em>
- Distribute -2: -2x + 8 = -16
- Isolate <em>x</em> term: -2x = -24
- Isolate <em>x</em>: x = 12
<u>Step 3: Check</u>
<em>Plug in x to verify it's a solution.</em>
- Substitute: -2(12 - 4) = -16
- Subtract: -2(8) = -16
- Multiply: -16 = -16
Here we see that -16 does indeed equal -16.
∴ x = 12 is a solution of the equation.
