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3 years ago

Which choice is equivalent to sqroot-125 PLEASE HELP

Mathematics

2 answers:

hodyreva [135]3 years ago

8 0

The answer is c!!!! :)))

Nina [5.8K]3 years ago

7 0

Answer:

C. $5i \sqrt{5}$

Step-by-step explanation:

$\sqrt{ - 125} \\ \\ = \sqrt{ - 1 \times 125} \\ \\ = \sqrt{ - 1} \times \sqrt{125} \\ \\ = i \times 5 \sqrt{5} \\ \\ \huge \red{ \boxed{= 5i \sqrt{5} }}$

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3 years ago

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3 years ago

When will the equation p(b)=520(0.88)^b have a value less than 100?

yulyashka [42]

Answer:

The given equation will have value less than 100 whenever the value of b is greater than 12.89

Step-by-step explanation:

For the given equation, p(b) = 520 × $0.88^{b}$ to have a value less than 100 we can establish inequality as:

p(b) < 100

or, 520 × $0.88^{b}$ < 100

or, $\frac{520}{520}$ × $0.88^{b}$ < $\frac{100}{520}$

or, $0.88^{b}$ < $\frac{1}{5.2}$

or, ㏒ ( $0.88^{b}$ ) < ㏒ ( $\frac{1}{5.2}$ )

or, b× ㏒ 0.88 < ㏒ ( $\frac{1}{5.2}$ )

or, $\frac{log (\frac{1}{5.2}) }{log (0.88)}$ < b

or, 12.89 < b

Hence for the equation to have value less than 100, b must be greater than 12.89.

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4 years ago

Please help math middle school level

pychu [463]

Answer:

7 yd

Step-by-step explanation:

You are finding the perimeter. Your answer should include yd (yd² is for area, yd³ is for 3d images).

Note that the two lines segments (? & 9) is parallel to the other line segment (16). Find the ?:

? + 9 = 16

? + 9 (-9) = 16 (-9)

? = 16 - 9

? = 7

7 yd is your answer

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4 years ago