Answer:
volume of cuboid=l×w×h
volume of cuboid=4×5×3=60cm³
Answer:
2?
Step-by-step explanation:
seven more than two equals nine because 9-7=2
Less than double of that number: double two is four and less than that is two, well that's what I understood from that. Hopefully it's right.
4 ? n-3=7 ? Because , unless you work out what 'n' is, you don't know yet what 'n' stands for?
Answer & Step-by-step explanation:
In order to calculate the area of a triangle, you must multiply the base by the height and divide it by 2. If you know how to work out the area of a rectangle, you should be able to easily work out the area of a triangle because a triangle is basically half of a rectangle or square. Therefore, you should use the same method of finding the area of a rectangle and then dividing it by 2 as it's half of a rectangle. I hope that makes sense!
Answer:
roots : 4, -4, i, -i
Step-by-step explanation:
This gets a bit tricky.
We have to substitude x^2 as u in this problem.
Now to rewrite x^4 − 15x^2 − 16 = 0 with u, we get
u^2 - 15u - 16 = 0
( u - 16) (u + 1)
U = 16
U = -1
<em>This is not the end of the problem. </em>
Now we have to substitute x^2 back to u.
x^2 = 16 --> we get the roots 4 and -4
x^2 = -1 --> we get the roots i and -i
tadah!