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3 years ago

For the function f(x) = 2x +3, evaluate f(3).

Mathematics

2 answers:

aliina [53]3 years ago

8 0

Answer:

${ \tt{f(x) = 2x + 3}}$

f(3) means x = 3, substitute for x as 3 :

${ \tt{f(3) = 2(3) + 3}} \\ = 6 + 3 \\ = 9$

AveGali [126]3 years ago

4 0

Answer:

Step-by-step explanation:

f(3) = 2(3) + 3

= 9

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Mai and Tyler work on the equation 2/5b+1=-11 together. Mais soulution is b=-25 and Tyler’s is b=-28. Here is their work. Do you

Anika [276]

Answer:

No I don't agree with their solution; both their answers are wrong.

Correct answer is $b=-30$ .

Step-by-step explanation:

Given:

$\frac{2}{5}b+1=-11$

Now given:

According to Mai $b = -25$ and According to Tyler $b = -28$

Now we need to find which of them is correct.

So we will solve the given equation we get;

$\frac{2}{5}b+1=-11$

Subtracting both side by 1 we get;

$\frac{2}{5}b+1-1=-11-1\\\\\frac{2}{5}b =-12$

Now Multiplying both side $\frac{5}{2}$ we get;

$\frac{2}{5}b\times\frac{5}{2}= -12 \times \frac{5}{2}\\\\b=-6\times 5\\\\b=-30$

Hence both of them are incorrect, correct answer is $b=-30$ .

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