Step-by-step explanation:
10x - 20 - 3x + 6 = 4x - 2
10x - 3x - 4x = 20 - 6 - 2
3x = 12
3x/3 = 12/3
x = 4
Answer:
x^2/25-y^/16=1 or y^2/16-x^2/25=1
Answer:
11. the first one 12. the last one
Step-by-step explanation:
Answer:
Step-by-step explanation:
These problems are based on triangle ratios. You cannot use the Pythagorean theorem to solve them.
The first triangle is a 45 45 90 degree triangle (I'm talking about the angles), and so, the ratio is 1:1:
, so I have to divide the hypotenuse by to get the legs. The hypotenuse is 15
, so that divided by is 15
. X is the same length as y because of the triangle ratio, so both x and y for the first triangle are 15.
The second triangle is a 30 60 90 degree triangle, so the ratio is x:x
:2x. The short leg is 7, so 7 * 2 is the hypotenuse, which is 14. The long leg is 7 * , which is 21. So, x for the second triangle is 14, and y for the second triangle is 21.
