Answer:
Option D. {–7, 7}
Step-by-step explanation:
3n^2 = 147
First, divide both side 3
n^2 = 147/3
n^2 = 49
Next, rearrange the variables to one side of the equation as shown below:
n^2 — 49 = 0
n^2 — 7^2 = 0
The above is now difference of two squares. This can be solve by doing the following:
(n — 7)(n + 7) = 0
n — 7 = 0 or n + 7 = 0
n = 7 or n = —7
0.67 x 5 is 3.35. So the coral would grow 3.35 feet in 5 years
First insert 4 into the place of every z. Making the problem 7(4) -4. Next multiply 7 and 4 to get 28, then simply subtract 4. Your answer will be 24
<u>ANSWER</u>:
(y + 5) + y = 6 (second option)
<u>EXPLANATION:
</u>From the given system of equation. we substitute the second equation x = y + 5 in the first equation x + y = 6 to get
x + y = 6
>> (y + 5) + y = 6
