Sebuah fungsi f dinyatakan dengan notasi f(3x+5)= 9x-4. Nilai dari f(7) adalah.... a. -3 b. -2 C. PR 12 (3.7+5)=9×7-4 d. 2 26 63-4 26
Answer (3)
If it costs her [ 37x + 20 ] to be a member of the gym for 'x' months, that means that it cost her 20 at the beginning just to sign up, before any time went by, and then another 37 every month after that.
The y-intercept of the function f ( x ) = 37 x + 20 is $20, which represents the initial membership fee Rachel pays when she joins the gym. This is a fixed cost incurred before any monthly fees, indicating her upfront investment to start her membership.
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f(3x + 5) = 9x - 4[tex] \sf f(x) = \not{9}^{2} ( \frac{x - 5}{ \not3} ) - 4[/tex]f(x) = 2(x - 5) - 4f(x) = 2x - 10 - 4f(x) = 2x - 14f(7) = 2(7) - 14f(7) = 14 - 14f(7) = 0[tex] \pink{\mathcal{M \it 01}} [/tex]
