ANSWER
EXPLANATION
The first equation is
The second equation is
We want to eliminate y, so we multiply the first equation by
We now subtract equation (3) from (2)
Multiply both sides by
Substitute into the first equation to solve for x .
Multiply to obtain
Multiply both sides by 2.
The solution is
Answer: This in science not math but I will describe photosynthesis is the plant take carbon and water and sun and it give us oxygen
Example : the plant take oxygen and give us oxygen
Answer: B. combination, 120 ways to award
Answer:
The false statement is: They must occur under carefully controlled conditions found in a laboratory.
Step-by-step explanation:
Scientific experiments do not always occur in laboratories, also, in the case of social studies, the experiments are done under not controlled conditions to prove the hypothesis.
On the other hand, all scientific experiments must be well documented and they always give useful results (in case the hypothesis is rejected, future investigations will use other hypothesis).
