Answer:
-22
Step-by-step explanation:
26-82=-56
-56+34=-22
Answer:
Number 2
Step-by-step explanation:
Answer:
18+31=49 for the first one, you just plug it in, that is all.
Step-by-step explanation:
Answer:
and
Step-by-step explanation:
- To use the substitution method, we should take one of the equations, and obtain an expression for one of the variables from this equation. Let's take the first one: 3x-2y = 11. We obtain an expression for x (it could be for y as well): 3x = 11 + 2 y ⇒ .
- Now, we should replace the expression obtain for x in the first equation, on the second equation, as follow
- ⇒
- Then rearranging terms
- This expression results in
- Finally, using the firs equation, in which we obtained an expression from x, , we replace y=1/2 and get , then
First convert 7.5 meters to 750cm, then use your formula A=1/2bh and pop it in your calculator: (1/2)(750)(6) and be sure to include cm as the unit of measurement in your final answer.