Answer:
c
Step-by-step explanation:
In the picture there are 6 triangles. Let's call the total amount x. Since 30% = 0.3 we can write 6 = 0.3x so x = 6 / 0.3 = 20. The picture that has 20 triangles is C.
Answer:
63.7 inches
Step-by-step explanation:
half the base is 9 inches, so the equal legs are each
L = √(9² +21²) = 22.8473...
Perimeter = 2(22.8473) + 18 = 63.6946... ≈ 63.7 inches.
Let the measure of side AB be x, then, the measue of side AE is given by

.
Now, ABCD is a square of size x, thus the area of square ABCD is given by

Also, AEFG is a square of size

, thus, the area of square AEFG is given by

<span>The sum of the areas of the two squares ABCD and AEFG is given by

Therefore, </span>the number of square units in the sum of the areas of the two squares <span>ABCD and AEFG is 81 square units.</span>
Answer:
x² - 2x - 8
Step-by-step explanation:
The notation (f·g)(x) means to multiply the two functions. Use the distributive property to simplify.
(f·g)(x) = (x+2)(x-4) = x² + 2x - 4x - 8 = x² - 2x - 8