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edimilperdomo
23.02.2021 •
Mathematics
Given the function ƒ(x) = 3x + 5, find ƒ(4) and x such that ƒ(x) = 38.
Select one:
A. 17; 11
B. 20; 13
C. 12; 15
D. 24; 9
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Ответ:
A.17;11
f(4)= 3(4) + 5
=12 + 5
=17
And, f(x)= 38
=>3x+5=38
=>3x= 38-5
=>3x=33
=>x = 33÷3
=>x = 11
So, A.17;11
Ответ:
1 and 3
Step-by-step explanation:
Step 1 is clearly elaborated. Tax is impliedd on the discounted price.
In step 3, the steps of deductions are skipped.
Like 1 + 10% = 110% and 1 - 20% = 80%
Step 2 is simply wrong. Because the percentages are implied on different values.