Subtract them, just like you added:
4x + 10 - (-5x +20)
The minus turns (-5x + 20) into the opposite, or 5x - 20
4x + 10 + 5x - 20
9x - 10
I really hope this helps.
Answer:
31/24 it is the answer in my point
Answer:
b = 7
Step-by-step explanation:
Since the triangle is right use the tangent ratio to solve for b
and the exact value
tan30° =
, thus
tan30° =
=
and
=
( cross- multiply )
b = 7
Area of sq.=1x1=1
Area of 4triangle=4(0.5x1x1)=2
Area of pyramid =1+2=3