rezolvati in multimea numerelor naturale ecuatiile:a)x+17=56 b)x+95=120 c)x+123=250 d)2020+x=2943 e)x-17=73 f)x-127=559 g)x-23=1
1 answer:
You might be interested in
Answer:
Step-by-step explanation:
Given
Represent Fred with F; Norman with N and Dave with D.
Required
Determine the arithmetic mean of F and N
First, we have that:
Substitute 44 for D
Subtract 44 from both sides
Arithmetic mean of F and N is calculated as follows:
Answer:
Step-by-step explanation:
So we have the equation:
First, let's determine the domain restrictions. Recall that the radicand cannot be negative. In other words, it must be greater than or positive than 0. Thus:
Subtract 6 from both sides:
What this means is that our solutions must be greater than or equal to -6. If not, we ignore them.
So, let's subtract 5 from both sides from the original equation:
Square both sides:
Subtract 6 from both sides:
138 is greater than -6, so 138 is a solution and is the only solution.
And we're done!