Answer:
Step-by-step explanation:
you have to use trigonometric functions
cos 30 = adj. /hyp.
cos 30 = 12 / y
y = 12/cos 30 ≅13.86
tan 30 = opp./adj
tan30 = x / 12
x = 12 tan30 ≅6.93
Answer: x=4, -1
Step-by-step explanation:
Assuming you meant 
, the zeros of the question are x = 4 and -1.
Step 1. Replace f(x) with y.
Step 2. To find the roots of the equation, replace <em>y</em> with 0 and solve.
Step 3. Factor the left side of the equation.
Step 4. Set x-4 equal to 0 and solve for <em>x</em>.
Step 5. Set 
equal to 0 and solve for <em>x</em>.
The solution is the result of and 
.
Answer:
imagine the upper triangle as the same as the lower one, but rotated by 180° around the corner point they share, and resized.
the base of the smaller triangle is resized by a factor of 3/4.5, or reduced: 1/1.5
we just take the length from the hypotenuse of the bigger triangle and resize it to, either by multiplying with 1/1.5 or by dividing by 1.5
personally, I find the latter easier.
x = 7.5/1.5 = 5
the area is 12 square meters, and the perimeter is 16.
