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NISA [10]
3 years ago
10

Roger goes to a restaurant with Cathy. They order an appetizer of calamari for $8. Roger has a glass of red wine for $4 and Cath

y some white wine for $5. They both order the steak entree for $26 each. The waitress did an excellent job, so Roger and Cathy wanted to tip her 20%. Taxes are included in each menu option. Afterwards, they went to the local ice cream shop and paid $7.56. What tip did they leave the waitress? Do not include $ in answer and round to the nearest tenth. Example, if answer is $19.897, put 19.9.
Mathematics
1 answer:
Schach [20]3 years ago
8 0

Answer:

13.8

Step-by-step explanation:

8+4+5=17

26×2=52

17+52=69

69×.20=13.8

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Step-by-step explanation:

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2 years ago
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A unit vector lies in the xy plane, at an angle of 137 degrees from the x axis, with a positive y component. What is the unit ve
Fed [463]

Answer: ( -0.731,  0.682)

Step-by-step explanation:

The unit vector is defined as a vector that points in the same direction as our vector (137 degrees from the x-axis) and has a magnitude of 1.

Knowing the angle, is really simple to do it.

First, we know that for a radius R and an angle A, the rectangular coordinates can be written as:

x = R*cos(A)

y = R*sin(A)

And if we want that the magnitude/modulus of our vector to be 1, then R = 1, and we know that A = 137°

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8 0
3 years ago
Judy pays $29 for 8 gallons of gas and 2 bottles of water. Carmen pays $45 for 12 gallons of gas and 4 bottles of water. How muc
Dmitry [639]
G=gas
w=bottle of water

8g + 2w = 29
12g + 4w = 45
I'm going to use elimination to cancel out the variable w by multiplying the first equation by -2.

-16g - 4w = -58
12g + 4w = 45
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Now plug it into an equation, any equation.
8 (3.25) + 2w = 29
26 +2w=29
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Now to check, plug it into both equations if you want.

12 (3.25) + 4 (1.5)=45
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One bottle of water is $1.50, while one gallon of gas is $3.25.
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3 years ago
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I = 9, 5.75

Step-by-step explanation:Gang

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3 years ago
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