let x be the age of her son
y = 25 + x
y - 25 = x
(y + 12) + (x + 12) = n
y + x + 24 = n
y + y - 25 + 24 = n
2y - 1 = n
sub
2(38)-1 = n
n = 78
The correct form of the present perfect tense is han vivdo. (Option D) Hence the correct sentence is:
"Ellos han vivido en California por 10 años"
<h3>What is
"present perfect tense" in Spanish?</h3>
In Spanish, the present perfect tense (known as el pretérito perfecto) is created to indicate actions or activities that have happened recently and/or activities that are still true.
Examples are:
I have eaten.
They have eaten.
Learn more about "present perfect tense" at:
brainly.com/question/9954525
Answer:
petroleum,
Explanation:
its a nonrenewable source
Okay what is the question :)