4 years ago

Factor 3x 2 - 15x - 42. 3(x - 2)(x - 7) 3(x - 2)(x + 7) 3(x - 7)(x + 2)

Mathematics

2 answers:

Anna71 [15]4 years ago

7 0

3*(x-7)*(x+2)
last option

alexandr1967 [171]4 years ago

7 0

3x^2 - 15x - 42
3(x^2 - 5x - 14)
3(x - 7)(x + 2) <==

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−20 ≤ 59(F−32) ≤ −15

lubasha [3.4K]

We take the value of F in the inequality by taking the inequalities in group. Let the first group be:

(1) -20 ≤ 59(F - 32)

Then, the second group would be,
(2) 59(F - 32) ≤ - 15

Calculating for the values of F,

(1) -20 ≤ 59F - 1888
1888 - 20 ≤ 59F
1868 ≤ 59F
F ≥ 31.66

(2) (59)(F - 32) ≤ - 15
59F - 1888 ≤ -15
59F ≤ 1873
F ≤ 31.75

The values of F are therefore,
31.66 ≤ F ≤ 31.75

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