1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zloy xaker [14]
3 years ago
15

Your family of 5 went to the Chinese buffet. The cost for each person was $8.95. The sales tax was

Mathematics
1 answer:
vampirchik [111]3 years ago
3 0

Answer:

9.93

Step-by-step explanation:

Just add your tax to your price.

You might be interested in
Ms. Robinson gave her class 12 minutes to read. Carrie read 5 ½ pages in that time. At what rate, in pages per hour, did Carrie
9966 [12]

Answer:

27.5 pages read per hour

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Maria has 2 dogs. Her friend bought her h more dogs. Write an expression that show how many dogs Maria has now.
AVprozaik [17]

Answer:

2+h

Step-by-step explanation:

7 0
2 years ago
A parabola has its focus at (1,2) and its directrix is y=-2. the equation of this parabola could be
Oksi-84 [34.3K]
<span>x^2/8 - x/4 + 1/8 = 0 A parabola is defined as the set of all points such that each point has the same distance from the focus and the directrix. Also the parabola's equation will be a quadratic equation of the form ax^2 + bx + c. So if we can determine 3 points on the parabola, we can use those points to calculate the desired equation. First, let's draw the shortest possible line from the focus to the directrix. The midpoint of that line will be a point on the desired parabola. Since the slope of the directrix is 0, the line will have the equation of x=1. This line segment will be from (1,2) to (1,-2) and the midpoint will be ((1+1)/2, (2 + -2)/2) = (2/2, 0/2) = (1,0). Now for the 2nd point, let's draw a line that's parallel to the directrix and passing through the focus. The equation of that line will be y=2. Any point on that line will have a distance of 4 from the directrix. So let's give it an x-coordinate value of (1+4) = 5. So another point for the parabola is (5,2). And finally, if we subtract 4 instead of adding 4 to the x coordinate, we can get a third point of 1-4 = -3. So that 3rd point is (-3,2). So we now have 3 points on the parabola. They are (1,0), (5,2), and (-3,2). Let's create some equations of the form ax^2 + bx + c = y and then substitute the known values into those equations. SO ax^2 + bx + c = y (1) a*1^2 + b*1 + c = 0 (2) a*5^2 + b*5 + c = 2 (3) a*(-3)^2 + b*(-3) + c = 2 Let's do the multiplication for those expressions. So (4) a + b + c = 0 (5) 25a + 5b + c = 2 (6) 9a - 3b + c = 2 Equations (5) and (6) above look interesting. Let's subtract (6) from (5). So 25a + 5b + c = 2 - 9a - 3b + c = 2 = 16a + 8b = 0 Now let's express a in terms of b. 16a + 8b = 0 16a = -8b a = -8b/16 (7) a = -b/2 Now let's substitute the value (-b/2) for a in expression (4) above. So a + b + c = 0 -b/2 + b + c = 0 And solve for c -b/2 + b + c = 0 b/2 + c = 0 (8) c = -b/2 So we know that a = -b/2 and c = -b/2. Let's substitute those values for a and c in equation (5) above and solve for b. 25a + 5b + c = 2 25(-b/2) + 5b - b/2 = 2 -25b/2 + 5b - b/2 = 2 2(-25b/2 + 5b - b/2) = 2*2 -25b + 10b - b = 4 -16b = 4 b = -4/16 b = -1/4 So we now know that b = -1/4. Using equations (7) and (8) above, let's calculate a and c. a = -b/2 = -(-1/4)/2 = 1/4 * 1/2 = 1/8 c = -b/2 = -(-1/4)/2 = 1/4 * 1/2 = 1/8 So both a and c are 1/8. So the equation for the parabola is x^2/8 - x/4 + 1/8 = 0 Let's test to make sure it works. First, let's use an x of 1. x^2/8 - x/4 + 1/8 = y 1^2/8 - 1/4 + 1/8 = y 1/8 - 1/4 + 1/8 = y 1/8 - 2/8 + 1/8 = y 0 = y And we get 0 as expected. Let's try x = 2 x^2/8 - x/4 + 1/8 = y 2^2/8 - 2/4 + 1/8 = y 4/8 - 1/2 + 1/8 = y 4/8 - 1/2 + 1/8 = y 1/2 - 1/2 + 1/8 = y 1/8 = y. Let's test if (2,1/8) is the same distance from both the focus and the directrix. The distance from the directrix is 1/8 - (-2) = 1/8 + 2 = 1/8 + 16/8 = 17/8 The distance from the focus is d = sqrt((2-1)^2 + (1/8-2)^2) d = sqrt(1^2 + -15/8^2) d = sqrt(1 + 225/64) d = sqrt(289/64) d = 17/8 And the distances match again. So we do have the correct equation of: x^2/8 - x/4 + 1/8 = 0</span>
4 0
3 years ago
How to make this y=21x-7 into standard form
Galina-37 [17]
The standard form is 21x-y-7=0
6 0
3 years ago
Write the following while number as it’s English word equivalent
ahrayia [7]

Answer:

eight hundred seventy-five thousand six hundred eighty-seven

<em>hope this helps :)</em>

8 0
2 years ago
Read 2 more answers
Other questions:
  • Given the trinomial, what is the value of the coefficient 'B' in the factored form?
    15·1 answer
  • SORRY I DONT HAVE A PHOTO CAN YOU AT LEAST TRY TO FIND IT OR YOU ARE IN K12 OR SOMTHING IF YOU KNOW THE ANSWER PUT IT PLZ 10 POI
    9·1 answer
  • BRAINLIEST!!!
    7·2 answers
  • If you pay $ 34.02 for a jacket that includes a 5% sales tax, what is the price of the jacket before the sales tax?
    11·2 answers
  • Which expression represents the quotient of 5 and y, decreased by the product of 3 and z?
    12·1 answer
  • Can anyone answer these? it would be appreciated:)
    9·1 answer
  • Tickets to the school dance cost $3.00 in advance or $5.00 at the door. There were a total of 184 tickets sold, raising $688. Ho
    9·1 answer
  • Plz answer these 2 questions hurry
    7·1 answer
  • Prepare grouped frequency distribution table
    15·1 answer
  • A cafe only sells two types of sandwiches, turkey and steak. The cafe charges $5 for turkey sandwiches and $6 for steak sandwich
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!