[2(x+10)] =
well we have to add first
x=1 + 10= 11 since there is parenthesis around the "11" it is times 11 x 2 = 22
we will just have to times this and put a - in front of the 90 (3x - 30) = -90
Hope I could help out.
Answer:
In significant figure is

You can turn it into normal decimal number.
In decimal number:

Hope this will help :))
The answer is a
Explanation: I’m not too sure about it
Remember
∛(ab)=(∛a)(∛b)
so
∛(8x²y³z⁴)=
(∛8)(∛x²)(∛y³)(∛z⁴)=
(∛(2³))(∛x²)(y)(z∛z)=
(2)(∛x²)(y)(z∛z)=
2yz∛(x²z)