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d1i1m1o1n [39]
3 years ago
9

If f(x) = 2x - 5, then f(4) is 17 5 4 3

Mathematics
2 answers:
vagabundo [1.1K]3 years ago
6 0

Answer:

  3

Step-by-step explanation:

The notation "f(4)" means you put 4 where x is in the algebraic expression, then do the arithmetic.

  f(4) = 2·4 -5

  = 8 -5

  = 3

Marat540 [252]3 years ago
4 0

Answer:

D

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

1) We have purple (p) and blue (b) marbles in a bag, and 41 marbles total so:

p+b = 41

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p = 41 - b

3) Our problem gives us an expression for the purple marbles in terms of the blue,  let's write it using math symbols instead of words:

<em>"The number of purple marbles is 4 less than 2 times the number of blue marbles."</em>

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3) Now we're going to plug this in (or substitute it) for our p in our first equation, and solve for b

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4, last step!)

Now we know we have 15 blue marbles, that's great! But we still want to know how many purple marbles we have.

41- 15 = 26 purple marbles

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Step-by-step explanation:

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