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2 years ago

Solve for X

Mathematics

2 answers:

balu736 [363]2 years ago

8 0

Answer:

x=10

Step-by-step explanation:

(3x+6)+54=90

3x+6=36

3x=30

x=10

nika2105 [10]2 years ago

6 0

Answer:

x=10

Step-by-step explanation:

Set up the equation, (3x+6)+54=90 because both angles equal up to 90 degrees, and then solve for x.

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vesna_86 [32]

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Step-by-step explanation:

we know that

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2 years ago

Read 2 more answers

140 subtracted from the square of a number the result is three times the number find the negative solution

natima [27]

Answer:

$Suppose~that~the~number~is~x.\\According~to~question,\\x^2-140=3x\\or, x^2-3x-140=0\\From~the~quadratic~formula,\\x = \frac{-(-3)+\sqrt{(-3)^2-4(1)(-140)} }{2(1)} ~and ~x= \frac{-(-3)-\sqrt{(-3)^2-4(1)(-140)} }{2(1)} \\or, x = \frac{3+\sqrt{9+560} }{2}~and~x=\frac{3-\sqrt{9+569} }{2}\\or, x = \frac{3+\sqrt{569} }{2}~and~x=\frac{3-\sqrt{569} }{2}\\So,~the~required~negative~number~is~\frac{3-\sqrt{569} }{2}.$

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2 years ago