Answer:
The working of expressions is shown below.
Step-by-step explanation:
We are given the following information:
a) Expand

b) Expand and simplify

c) Expand

d) Factorize fully

Answer:
x > 69.49
Step-by-step explanation:
Step 1: Write out equation
2x - 13.7 > 125.28
Step 2: Add 13.7 to both sides
2x > 138.98
Step 3: Isolate <em>x </em>by dividing both sides by 2
x > 69.49
So <em>x</em> has to be greater than 70 in order to fit into the question context.
Answer:
24 ft^2
Step-by-step explanation:
Area of ABC=(1/2)*b*h
=(1/2)*8*6=24 ft^2
Answer:
Approximately 76.5 mg.
Step-by-step explanation:
Given,
The initial quantity of the Bismuth-210, P = 233 mg,
Also, the rate of decay per day, r = 13 %
Thus, the quantity of the Bismuth-210 after 8 days would be,






Answer:
Step-by-step explanation:
4.2x+4.7=18.6
Multiple each term by 10
42x + 47 = 186
Collecting like terms
42x = 186 - 47
42x = 139
x = 139/42
x = 3 13/42 or 3.3