Answer:
sorry i need to unlock ads
Step-by-step explanation:
Answer:
Its a i just took the test
Step-by-step explanation:
Answer:
A) 0.5 g/cm³
Step-by-step explanation:
To find volume, you must multiply length × width × height
So it would be 3 × 2 × 4
3 × 2 × 4 = 24
Volume = 24
Plug in both numbers into the equation for Density
12 ÷ 24 = 0.5
The density will be 0.5 g/cm³
For this case we have the following system of equations:

We can write a system of equivalent equations.
For this, it is enough to multiply one of the two equations by a scalar.
Multiplying the equation 1 by 2, we have:

Therefore, the new system of equations is:

Answer:
A system that is equivalent is:
D) 
A.
let the number be n.
2n+5=45
2n=40
n=20