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3 years ago

Can someone please help me with this!!!

Mathematics

1 answer:

Volgvan3 years ago

4 0

Step-by-step explanation:

I am not fully sure what your teacher is aiming for. it friends very much on what you were just discussing in class (which I don't know).

but the first thing coming to mind is a minus sign ("-"). squaring a negative number removed the minus and makes the result equal to squaring the same positive number.

just for the undoing the 1/2 :

that is, because a fraction as exponent specifies in its denominator the root to be calculated for the basic value or expression.

so, 1/2 means square root. and yes, square is the inverse function of a square root, and it "undoes" the square root.

in exponent calculation it just means that for exponent 1 to the power of exponent 2 we simply multiply both exponents. and so, 1/2 × 2 = 1

FYI - the numerator still represents an original "to the power of" operation.

so, e.g. 3/2 would mean put the basis to the power of 3 and then do the square root of that result. or the other way around. these operations are commutative (the sequence does not matter).

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Una diseñadora de modas que confecciona trajes de noche, tarda 3 horas en cortar y 2 horas en coser cada vestido de fiesta. Para

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For this case we define the following variables:

x: Number of party dresses

y: Number of suits

You have 30 hours per week to cut, that is, the first equation is given by:

$3x + 3y = 30\\$

It is also known that 25 hours per week are available for sewing, that is:

$2x + 3y = 25\\$

It has a system of two equations with two unknowns, solving we have:

$3x + 3y = 30\\\\2x + 3y = 25\\$

Multiplying the second equation by -1:

$3x + 3y = 30\\\\-2x-3y = -25\\$

Adding up:

$x + 0 = 5\\\\x = 5\\$

Substituting x in the first equation:

$3 * 5 + 3y = 30\\\\15 + 3y = 30\\$

Clearing and:

$3y = 30-15\\\\3y = 15\\$

$y = \frac{15}{3}\\\\y = 5\\$

Thus, per week, the designer can produce 5 party dresses and 5 suits working at her maximum capacity.

Answer:

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3 years ago

9. The theater club of a local high school is planning a production. The amount of time t needed to assemble the set is inversel

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Answer:

The situation that represents this situation is:

$t = \frac{60}{n}$

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The amount of time t needed to assemble the set is inversely proportional to the number people n working.

This means that:

$t = \frac{k}{n}$

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This means that for $n = 12, t = 5$ . We use this to find k.

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