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2 years ago

The check for Tia's brunch was $26.50. Tia left a $5.30 tip. The tip was what PERCENT of the cost of her brunch?

Mathematics

2 answers:

sveta [45]2 years ago

4 0

Answer:

20%

Step-by-step explanation:

sergiy2304 [10]2 years ago

4 0

Answer:

20%

Step-by-step explanation:

let x be the percent of the cost of her brunch to tip

26.50 * x/100=5.30

0.265x=5.30

x=5.30/0.265

x=20%

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Evaluate log(-13)<br> Correct answer will get brainliest

Sedaia [141]

if given log(a)=b, where no base is stated, we assume base 10, or $log(a)=log_{10}(a)$

also, $log_a(b)=c$ translates to/can be written equivilently as $a^c=b$

therefore, given

$log(-13)=?$ where we want to find ?

assume base 10 and translate

$10^?=-13$

since we cannot raise a positive number to any real power and give a negative number, ? is not a real number and therefore, there are no real solutions

if we do want to find a solution, we can use Euler's idendity

$e^{\pi i}=-1$ where i is the complex number i=√-1 and e is euler's number

we can try to change bases to find the value of ?

$e^{\pi i}=-1$

$13e^{\pi i}=-13$

$13e^{\pi i}=10^?$

taking ln of both sides

$ln(13e^{\pi i})=ln(10^?)$

using log rules

$ln(13)+(\pi i)ln(e)=(?)ln(10)$

$ln(13)+\pi i=?ln(10)$

divie both side by ln(10)

$\frac{ln(13)+\pi i}{ln(10)}=?$

in a+bi form

$?=\frac{ln(13)}{ln(10)}+\frac{\pi}{ln(10)}i$

there are no real numbers that it evaluates to

however, it does evaluate to a complex number which is $\frac{ln(13)}{ln(10)}+\frac{\pi}{ln(10)}i$ or aproximately 1.11394+1.36438i

3 0

3 years ago

Write an equation in point slope form of the line that passes through the given point and has the given slope (7,-6);m=1/2

AveGali [126]

The equation of line is:

$y = \frac{1}{2}x-\frac{19}{2}$

Further explanation:

The general form of point-slope equation is:

$y = mx+b$

It is given that m = 1/2

Putting in the value of m

$y = \frac{1}{2}x+b$

We have to find the value of b so putting the value of x and y

(x,y) = (7,-6)

$-6 = \frac{1}{2}(7)+b\\-6 = \frac{7}{2} +b\\b = -6-\frac{7}{2}\\b = \frac{-12-7}{2}\\b = \frac{-19}{2}$

Putting the values of b and m in general form

$y = \frac{1}{2}x-\frac{19}{2}$

Keywords: Equation of line, point-slope form

Learn more about point-slope form of equation of line at:

#LearnwithBrainly

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3 years ago

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aliina [53]

Answer:

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Step-by-step explanation:

The midsegment MN is half the sum of the 2 parallel bases, that is

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HG + 16 = 44 ( subtract 16 from both sides )

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nika2105 [10]

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Finger [1]

Answer:

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<u>I would appreciate Brainliest, but no worries.</u>

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