Answer:
h ≈ 7.9 cm
Step-by-step explanation:
Using the sine ratio in the right triangle
sin26° =
=
( multiply both sides by 18 )
18 × sin26° = h , then
h ≈ 7.9 cm ( to 1 dec. place )
{ x + 3 y = 7 * ( - 2)
2 x + 4 y = 8
{ - 2 x - 6 y = - 14
2 x + 4 y = 8
_______________
-2 y = - 6 * ( -1)
2 y = 6
y = 6 / 2
y = 3
For x :
2 x + 4 y = 8
2 x + 4 * ( 3) = 8
2 x + 12 = 8
2 x = 8 - 12
2 x = - 4
x = - 4 / 2
x = - 2
Solution: x = -2 and y = 3
hope this helps!
Answer:
should be 6
Step-by-step explanation:
Pythagorean Theorum was used.
The calculus approach is to use Newtons Method:

where

Start with initial guess of "a".
After 4 or 5 iterations, you should get a close approximation to

...............
If you wanted a non-calculus approach, I would suggest divide and conquer.
First determine which 2 integers the sqrt lies in between by perfect squares.

Then use midpoint

for next guess, if

then repeat with "m" = midpoint. Otherwise repeat with "n" = midpoint.
Continue until you have a good approximation, about 6-8 decimal points.