7. A quadratic function has the form y-ax' for
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1a. n ≤ 21
1b. n ≥ 5
1c. n > 3/5
2d. n < 14
2e. n ≥ 14
1b. n ≥ 5
1c. n > 3/5
2d. n < 14
2e. n ≥ 14
the numbers are 6 and 13
let x be one of the numbers then the other is 2x + 1
their sum increased by 7 = 26
x + 2x + 1 + 7 = 26
3x + 8 = 26
subtract 8 from both sides
3x = 26 - 8 = 18
divide both sides by 3
x = = 6
the numbers are 6 and (2 × 6) + 1 = 12 + 1 = 13