Answer:
79
Step-by-step explanation:
To find the value of
, when x = 3, simply plug in the value of x in the expression and solve as follows:




The value of
, when x = 3, is 79
Answer:
Area: 6a^2
Perimeter: 12a^2
Step-by-step explanation:
To find the area of a triangle, use the formula A=1/2 b*h. The base is 3a^2 and the height is 4a^2.
A= 1/2 (3a^2)(4a^2)
A = 1/2 (12a^4)
A = 6a^4
To find the perimeter of the triangle, add each of the sides of the triangle. The third side, the hypotenuse, can be found using Pythagorean theorem.

Now add each of the sides: 3a^2 + 4a^2 +5a^2 = 12a^2
Answer with explanation:
Time taken by a person to read number of pages in a chapter= 18 minutes
It is not given what is the length of the page.So,we can't say exactly how many pages can a person read by completely understading what is written in each page in a chapter.
So, to fully understand each and every page in 18 minutes you can read minimum number of pages from the option given.
Option A:⇒ 15, is most appropriate.
60-3d + 20-6 =4d
74-3d =4d
-3d =4d -74
-7d = -74
D=74/7