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2 years ago

Multiply. 9i (5-2i)=

Mathematics

1 answer:

Vilka [71]2 years ago

6 0

Answer:

The answer is 45i + 18

since i *i=-1

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Deisha can build a fence in 15 hours, and Travis can build a fence in 12 hours. How long will it take them together to build a f

Basile [38]

Answer:

6 $\frac{2}{3}$

Step-by-step explanation:

Deisha's build rate = 1 fence per 15 hours = 1/15 fences per hour

Travis's build rate = 1 fence per 12 hours = 1/12 fences per hour

Working together, their combined rate is 1/15 + 1/12 = 3/20 fences per hour

So it takes them 20/3 = 6 2/3 hours per fence

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2 years ago

I WILL MARK BRAINLIEST please answer the Number model and the solution thankyouuuuu

Stels [109]

Answer:

Alexis has more debt

Step-by-step explanation:

Number model( use shapes or blocks to represent each unit)

Max: $15

•••••••••••••••

Alexis:$17

•••••••••••••••••

Alexis borrowed $2 more than Max

17-15=2

Therefore he has to pay back more. He has $2 more debt than Max.

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2 years ago

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I need help on this.

Vadim26 [7]

Answer:

its PQ for a fact

Step-by-step explanation:

trust i nme

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2 years ago

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If the each side of equalaterial triangle is a cm. what is the area?

Yuri [45]

Step-by-step explanation:

$area \: of \: a \: triangle = \frac{1}{2} \times base \times height \\ \\ base = \frac{a}{2} cm \\ {h}^{2} + {( \frac{a}{2} )}^{2} = {a}^{2} \\ \\ h = \sqrt{ {a}^{2} - \frac{ {a}^{2} }{4} } \\ \\ area \: of \: triangle = \frac{1}{2} \times b \times h \\ = \frac{1}{2} \times \frac{a}{2} \times \sqrt{ {a}^{2} - \frac{ {a}^{2} }{4} } \\ \\ = \frac{a}{4} \times \sqrt{ {a}^{2} - \frac{ {a}^{2} }{4} }$

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2 years ago

22. What is the value of x2 - 2xy + 2y2 when x = 2, y = 3?<br> A. 8<br> B. 10<br> C. 12<br> D. 14

Rom4ik [11]

The answer will be A

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2 years ago