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fredd [130]
2 years ago
10

100 POINTS!!!!!!!!!!

Mathematics
2 answers:
Vanyuwa [196]2 years ago
8 0

Answer:

x = 6 , x = 4

Step-by-step explanation:

A line parallel to a side of a triangle and intersecting the other 2 sides then divides those sides proportionally, that is

\frac{x}{18} = \frac{28-21}{21} = \frac{7}{21} = \frac{1}{3} ( cross- multiply )

3x = 18 ( divide both sides by 3 )

x = 6

(14)

\frac{x+5}{15} = \frac{5x+1}{35} ( cross- multiply )

15(5x + 1) = 35(x + 5) ← distribute parenthesis on both sides

75x + 15 = 35x + 175 ( subtract 35x from both sides )

40x + 15 = 175 ( subtract 15 from both sides )

40x = 160 ( divide both sides by 40 )

x = 4

Ne4ueva [31]2 years ago
5 0

the fiest answer is x=6 for the second one the answer is x=4

Step-by-step explanation:

x+15/5x+1 =15/35 then cross multiply

1st one

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algol [13]
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3 years ago
Simplifty (x - 4)(x +8)
sineoko [7]

Answer: x² + 4x - 32

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Remember, F.O.I.L. stands for First, Outter, Inner, Last.

This is because we start with the product of the first terms which is x², then we add the product of the outer terms which is 8x, then we add the middle terms which is -4x, and then we add the product of the last terms which is -32.

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