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3 years ago

Katie lunch cost 17 dollars no tax she gave a tip of 18 percent of the cost of lunch what’s the total cost no tax

Mathematics

2 answers:

koban [17]3 years ago

6 0

Answer: 20.06

Step-by-step explanation:

17 x 1.18 = 20.06

MatroZZZ [7]3 years ago

3 0

Answer:

20.06 dollars

Step-by-step explanation:

17 x 0.18 = 3.06

17+ 3.06=20.06

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Solve the multiplication problem -5/8 times 2/3

wel

Answer:

$\frac{-5}{8}\times \frac{2}{3}=\frac{-5}{12}$ or -0.42

Step-by-step explanation:

Given:

The statement says -5/8 times 2/3

Solution:

$=\frac{-5}{8}\times \frac{2}{3}$

$=\frac{-5\times 2}{8\times 3}$

$=\frac{-10}{24}$

the numerator and denominator is divided by 2

$=\frac{-5}{12}$

Therefore, The multiplication of $\frac{-5}{8}$ and $\frac{2}{3}$ is $\frac{-5}{12}$ or -0.42

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3 years ago

Beth sold half of her comic books and then bought nine more she now has 28 how many did she have to start with

allochka39001 [22]

28 - 9 = 19
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8 0

3 years ago

Find dy/dx given that y = sin x / 1 + cos x

kobusy [5.1K]

Answer:

$\frac{1}{1 + \cos(x) }$

Step-by-step explanation:

$y = \frac{ \sin(x) }{1 + \cos(x) }$

differentiating numerator wrt x :-

(sinx)' = cos x

differentiating denominator wrt x :- 

(1 + cos x)' = (cosx)' = - sinx

Let's say the denominator was "v" and the numerator was "u"

$(\frac{u}{v} )' = \frac{v. \: (u)' - u.(v)' }{ {v}^{2} }$

here,

since u is the numerator u= sinx and u = cos x
v(denominator) = 1 + cos x; v' = - sinx

$= \frac{((1 + \cos \: x) \cos \: x )- (\sin \: x. ( - \sin \: x) ) }{( {1 + \cos(x)) }^{2} }$

$= \frac{ \cos(x) + \cos {}^{2} (x) + \sin {}^{2} (x) }{(1 + \cos \: x) {}^{2} }$

since cos²x + sin²x = 1

$= \frac{ \cos \: x + 1}{(1 + \cos \: x) {}^{2} }$

diving numerator and denominator by 1 + cos x

$= \frac{1}{1 + \cos(x) }$

6 0

3 years ago

PLEASE HELP ASAP Answer correctly

givi [52]

Answer:

62,100

Step-by-step explanation:

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3 years ago

What is an expression for the distance between the origin and a point P(x,y)

kirza4 [7]

Answer:

$d = \sqrt{ {x}^{2} + {y}^{2} }$

Step-by-step explanation:

Distance between origin (0, 0) and point (x, y) is given as:

$d = \sqrt{ {(x - 0)}^{2} + {(y - 0)}^{2} } \\ \\ \red{ \bold{ d = \sqrt{ {x}^{2} + {y}^{2} } }}$

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3 years ago