If f(x) = 28+x + 7, what is the value of f(-9), to the nearest hundredth (if necessary)?
2 answers:
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Answer:
Sarah is correct
Step-by-step explanation:
Required
Which of the students is correct
Let a number be x,
Given what the teacher asked the students to do, the solution is:
Only Sarah got this correctly; others are incorrect.
The proof is as follows.
For Sarah
So, the numbers will be: 1416, -1416 and 1416
<em>Other students are incorrect</em>
Answer:
3 days
Step-by-step explanation:
Let the amount of work be x.
Daniel:
10 days = x
1 day = x
Father:
6 days = x
1 day = x
Together:
1 day = x +
x
= x +
x
= x
= x
No. of days = x ÷
x
= x ×
x
=
= 3