Answer:
6
Step-by-step explanation:
Use Pythagorean theorem:
a²+b²=c²
8²+a²=10²
64+a²=100
subtract 64 from 100
a²=36
√a=√36
a= 6
X=-2.666666666666666666667
x= -2.67 rounded
Hi,
2.
5(3+2x) = 10x - 4
15 + 10x = 10x - 4
10x - 10x = - 4 - 15
0 = -19
In other word there is no solution here, code G
3.
x+5 = (3x+13) / 2
x+5 = (3/2)x + 13/2
x - (3/2)x = 13/2 - 5
x(1-3/2) = 13/2 - 10/2
x(2/2 - 3/2) = 3/2
(-1/2)x = 3/2
x = (3/2) / (-1/2)
x = (3/2) * (-2)
x = (-6/2)
x= -3
code : D
Good Luck :)
