Answer:
The last answer; 12.
Step-by-step explanation:
In order to solve this, use substitution. Since it gives you an equation for y, substitute that equation in the other formula as y. This will give you:
Then simplify:
Since 6x - 6x cancels out, you are left with 12.

Answer:
1 3/40
Step-by-step explanation:
1 1/4 +1 1/5 +7/8= 3 13/40
3/4 .3= 2 1/4
3 13/40 - 2 1/4
V = (4cm)(5cm)(3cm) = 60 cm³
M = 120g
<u><em>Density = M/V = (120g)/(60cm³) = 2 g/cm³</em></u>
Te get this answer u must do 9282938+(-847372837)=(-63827884) is ur answer I took the test