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3 years ago

How much would a 20% tip be on a 48$ restaurant

Mathematics

2 answers:

kipiarov [429]3 years ago

8 0

$9.60 would be 20% of tip on a $48 tab

ICE Princess25 [194]3 years ago

8 0

It is 57.6 dollars
For that much

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Simplify (Are all division) 2+4i 3i 3+2i 4+i 2i^11

Alla [95]

$We\ know:\ i=\sqrt{-1}\to i^2=-1$

$\dfrac{2+4i}{3i}=\dfrac{2+4i}{3i}\cdot\dfrac{3i}{3i}=\dfrac{6i+12i^2}{9i^2}=\dfrac{6i+12(-1)}{9(-1)}\\\\=\dfrac{6i-12}{-9}=\dfrac{2i-4}{-3}=\dfrac{4}{3}-\dfrac{2}{3}i$

$\dfrac{3+2i}{4+i}=\dfrac{3+2i}{4+i}\cdot\dfrac{4-i}{4-i}=\dfrac{(3+2i)(4-i)}{4^2-i^2}\\\\=\dfrac{(3)(4)+(3)(-i)+(2i)(4)+(2i)(-i)}{16-(-1)}=\dfrac{12-3i+8i-2i^2}{16+1}\\\\=\dfrac{12+5i-2(-1)}{17}=\dfrac{12+5i+2}{17}=\dfrac{14+5i}{17}=\dfrac{14}{17}+\dfrac{5}{17}i$

$2i^{11}=2i^{10+1}=2i^{10}i^1=2i^{2\cdot5}i=2i(i^2)^5=2i(-1)^5=2i(-1)=-2i$

$Used:\ (a+b)(a-b)=a^2-b^2$

6 0

3 years ago

You put $643 into an investment at 3% for one year. What will the balance (total amount) be

baherus [9]

Answer:

$662.29

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Please help ASAP don’t mind the scribbles

hjlf

U = 1

L = 0

R = -2

I = 24

M = 17

H = -3

E = 100

S = -439

O = 11

B = -6

T = -41

D = 19

C = 206

Hope this helped ! :)

8 0

3 years ago

A. - 8/5 B. 5/8 C. - 5/8 D. 8/5

IrinaK [193]

Answer:

5/8

Step-by-step explanation:

To find the slope, use the formula

m = (y2-y1)/(x2-x1)

= (2 - -3)/(6 - -2)

= (2+3)/(6+2)

= 5/8

5 0

3 years ago

Help!!! I will give brainliest.

iVinArrow [24]

4x - 4y = -36
3x + 4y = 8
7x = -28
/7 /7
x = -4

-4 - y = -9
+4 +4
-y = -5
/-1 /-1
y = 5

(-4 , 5)

7 0

3 years ago