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Pachacha [2.7K]
3 years ago
11

Find the value of x. (5x+15) (6x-10)

Mathematics
2 answers:
Annette [7]3 years ago
7 0

Answer:

We get x = -5/3 and x = -3

Step-by-step explanation:

(5x+15) (6x-10)

Multiplying this and equating to zero, to find x.

30x^{2} -50x+90x-150=0

30x^{2} +40x-150=0

Factoring out 10.

3x^{2} +4x-15=0

3x^{2} +9x-5x-15=0

3x(x+3)-5(x+3)=0[tex](3x-5)(x+3)=0[/tex]

We get x = -5/3 and x = -3

Blizzard [7]3 years ago
4 0
(5x+15)(6x-10)
= 30x^2 + 30x - 50x - 150
= 30x^2 - 20x - 150
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Does anyone know this ? i'm stuck.. i'll give you brainliest and 15 points !! show work.
madam [21]

Answer:

x = 7

Step-by-step explanation:

The angle adjacent to the 70 degree angle is also 70 degrees.  We assume that there are four 90-degree angles in the center of the figure.  Thus, 8x - 36 + 70 + 90 = 180 (the sum of the interior angles is 180 degrees).

Solving  8x - 36 + 70 + 90 = 180 for x:

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5 0
3 years ago
12 lb13 oz + 6 lb11 oz
max2010maxim [7]

Answer:

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Step-by-step explanation:

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6 0
3 years ago
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Nikolay [14]
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8 0
3 years ago
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Nata [24]

Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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