Answer:
x=10
Step-by-step explanation:
3x+8x=100+10
11x=110
x=110/11
x=10
<span>2.48030, its rounded tenths 2.5 hundreths 2.48 thousands 2.480 ten-thousands 2.4803 then </span>hundred-thousandth 2.48030
You would use the tangent first, because the opposite of 40 would be x and the adjacent would be 30ft