Pleaseeeee hellllppppp and explainnn
1 answer:
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A quadratic equation is written in the form
Looking at the second, third, and fourth options, we see that the highest powers are greater than two, which automatically disqualifies them from being quadratics (since the highest power in a quadratic is 2).
This makes the first option the correct choice since the expansion of the equation gives
Answer:
15 years old.
Step-by-step explanation:
Let Jim's age now be one unit (1u).
His uncle's age now is then 4 units.
Jim's age in 10 years = 1u + 10
Jim's uncle's age in 10 years = 4u + 10
In 10 years, Jim's uncle's age will be 20 years more than twice Jim's age.
Twice Jim's age =
Since Jim's uncle's age is 20 years more than this, we can say that his uncle's age is equal to
which is equal to
We found out that Jim's uncle's age in 10 years is 4u+10. Hence
We subtract 10 from both sides:
Therefore
and one unit is 15. Hence, Jim's age now is 15.