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2 years ago

Solve for x please describe the steps 50 points

Mathematics

1 answer:

LuckyWell [14K]2 years ago

8 0

Answer:

x = 6

explanation:

USE: $\boxed{\frac{side-length }{base -length} = \frac{side-length}{base -length} }$

solve:

$\frac{21}{15} = \frac{7}{x-1}$

$21(x-1) = 7(15)$

$21x-21 = 105$

$21x = 105+21$

$21x = 126$

$x = \frac{126}{21}$

$x = 6$

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Using The Pythagorean theorem (a^2 + b^2 = c^2) we can find A or In This Case X

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3 years ago

A new computer can complete a complex biochemistry calculation in 11 hours less than an older-model computer. Working together,

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Answer:

New computer will take 33.28 hours to complete the calculation by itself.

Step-by-step explanation:

Let the time taken by the new computer to complete the calculation = x hours

Per hours work done by the new computer = $\frac{1}{x}$

Time taken by the older computer to complete the calculation = (x + 11) hour

Per hour work done by old computer = $\frac{1}{(x+11)}$

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Therefore, per hour work done by both together = $\frac{1}{19}$

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By quadratic formula,

x = $\frac{27\pm \sqrt{(-27)^{2}-4\times 1\times (-209)}}{2}$

x = $\frac{27\pm \sqrt{729+836}}{2}$

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