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rusak2 [61]
3 years ago
11

Given the function f(x)=2x-7. What is x when f(x)=17?

Mathematics
2 answers:
VashaNatasha [74]3 years ago
7 0

Answer:

f(17)=2(17)-7

=34-7

=27

Eduardwww [97]3 years ago
4 0

Answer:

x = 12

Step-by-step explanation:

Step 1: Define

f(x) = 2x - 7

f(x) = 17

Step 2: Substitute

17 = 2x - 7

Step 3: Solve for <em>x</em>

<u>Add 7 on both sides:</u> 24 = 2x

<u>Divide both sides by 2:</u> 12 = x

Step 4: Check

f(12) = 2(12) - 7

f(12) = 24 - 7

f(12) = 17

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3 years ago
Sarah has a brother who is 5 years younger than herself and another brother who is 8 years younger than herself. She observes th
ELEN [110]

Answer:

Sarah is 13 years old

Step-by-step explanation:

Represent Sarah's age with S

Her first brother's age with F

Her second brother's age with B

So, we have:

From the first statement, we have:

S - F = 5 ---- (1)

From the second, we have:

S - B = 8 ---- (2)

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First, we make F the subject in (1) and B the subject in (2)

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B = S - 8

Their product is represented as follows:

F * B = 40

Substitute values for F and B

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Open bracket

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