For the question 2
the square root of a is a^(1/2)
so you can multiply a^2 and a^(1/2)
to get a^2.5
(a^3)^2 is equal to a^6
Divide a^2.5by a^6
The answer is a^(-3.5)
or 1/a^(3.5)
Answer:
334.64 i think
Step-by-step explanation:
I DO MATHS
Each equation equal y, right? So you can substitute 1/2x+6 for y in y=4x-1 (or 4x-1 in y=1/2x+6). Either way, you'll end up with 4x-1=1/2x+6. Then, you just solve for x.
4x-1=1/2x+6
3.5x=5
x=5/3.5
I would suggest leaving it in fraction form considering if you translate it to decimal form it will be a less precise answer.
1.-43+38=-5
2.8-7+4=1+4=5
3.-4+5+6=1+6=7
To solve just isolate y from 2x-y=-1 to get y=2x+1. Then substitute y=2x+1 into 3x-2y=1. So it should be this: 3x-2(2x+1)=1. Distribute to get 3x+4x-2=1. Add the x's to get 7x-2=1, add two to both sides to get 7x=3 and divide to finally get x=3/7.
