The sum of three times a number and seven is greater than four times the number
1 answer:
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Answer:
Final answer is approx x=0.16.
Step-by-step explanation:
Given equation is
Now we need to solve equation and round to the nearest hundredth.
Round to the nearest hundredth.
Hence final answer is approx x=0.16.
Answer:
Step-by-step explanation:
The goal to solving any equation is to have x = {something}. That means we need to get the x out from underneath that radical. It's a square root, so we can "undo" it by squaring. Square both sides because this is an equation. Squaring both sides gives you
Get everything on one side of the equals sign and set the quadratic equal to 0:
Throw this into the quadratic formula to get that the solutions are x = 5 and -8. We need to see if only one works, both work, or neither work in the original equation.
Does ?
and
and 5 = 5. So 5 works. Let's try -8 now:
and
so
-8 = 8? No it doesn't. So only 5 works. Your choice is the third one down.