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
atroni [7]
3 years ago
14

1. Price: $40.00, 10% tax, 15% tip

Mathematics
2 answers:
velikii [3]3 years ago
8 0
The answer should be 55$
Alex Ar [27]3 years ago
7 0

Answer: $6.00

Step-by-step explanation:

You might be interested in
three positive numbers are in Arithmetic Progression (A.P). the sum of the squares of the three numbers is 155. while the sum of
Alecsey [184]
Given:
Three numbers in an AP, all positive.
Sum is 21.
Sum of squares is 155.
Common difference is positive.

We do not know what x and y stand for.  Will just solve for the three numbers in the AP.
Let m=middle number, then since sum=21, m=21/3=7
Let d=common difference.
Sum of squares
(7-d)^2+7^2+(7+d)^2=155
Expand left-hand side
3*7^2-2d^2=155
d^2=(155-147)/2=4
d=+2 or -2
=+2  (common difference is positive)

Therefore the three numbers of the AP are
{7-2,7,7+2}, or
{5,7,9}


6 0
3 years ago
PLZ HELP!!! I Will give brainliest. What is the value of x in sin(3x)=cos(6x) if x is in the interval of 0≤x≤π/2
sertanlavr [38]

Answer:

sin(2x)=cos(π2−2x)

So:

cos(π2−2x)=cos(3x)

Now we know that cos(x)=cos(±x) because cosine is an even function. So we see that

(π2−2x)=±3x

i)

π2=5x

x=π10

ii)

π2=−x

x=−π2

Similarly, sin(2x)=sin(2x−2π)=cos(π2−2x−2π)

So we see that

(π2−2x−2π)=±3x

iii)

π2−2π=5x

x=−310π

iv)

π2−2π=−x

x=2π−π2=32π

Finally, we note that the solutions must repeat every 2π because the original functions each repeat every 2π. (The sine function has period π so it has completed exactly two periods over an interval of length 2π. The cosine has period 23π so it has completed exactly three periods over an interval of length 2π. Hence, both functions repeat every 2π2π2π so every solution will repeat every 2π.)

So we get ∀n∈N

i) x=π10+2πn

ii) x=−π2+2πn

iii) x=−310π+2πn

(Note that solution (iv) is redundant since 32π+2πn=−π2+2π(n+1).)

So we conclude that there are really three solutions and then the periodic extensions of those three solutions.

5.8K views

View upvotes

5

Related Questions (More Answers Below)

5 0
3 years ago
GCF of 8x^8 and 28x^4
hichkok12 [17]
8x^8=2*2*2*x*x*x*x*x*x*x*x
28x^4=2*2*7*x*x*x*x

GCF is the common group
GCF=2*2*x*x*x*x
GCF=4x^4
8 0
3 years ago
Find x and y thanks :D
Alika [10]
So wyou said she was going to
8 0
3 years ago
What is the fractional value of A?
Fofino [41]

Answer:

2/5 because there is 5 spots and A is the second one on the number line

8 0
2 years ago
Other questions:
  • How many 1/4 pound servings of walnuts, s, are in 3/4 pound of<br>walnuts?​
    6·2 answers
  • Jenny's aunt wants to buy a mix of almonds and pecans as a birthday gift for Jenny. She wants to buy 6 pounds of nuts in total a
    6·2 answers
  • It’s says 1/2 teaspoon per gallon bucket holds 26 gallons how many teaspoons?
    13·2 answers
  • Find the area of the trapezoid shown below.<br>A. 104 ft²<br>B. 52 ft²<br>C. 208 ft²<br>D. 1344 ft²​
    9·2 answers
  • if the population of a state us 1,821,000 and is decreasing by 0.2% every year.what will be the population in 5 years?
    8·2 answers
  • Clara pays $76 for 8 guitar lessons. How much would 10 guitar lessons cost?
    14·2 answers
  • 2x^2+15x=8<br>factor or solve as indicated, show all work.<br>please and thank u!​
    10·1 answer
  • Hey please help me! :P Giving out brainlest too! :P
    15·1 answer
  • Solve the following equation for y.<br> 23x+7y=-17
    11·2 answers
  • Which one is greater 3 with the power of 2 or 2 with the power of 3 tell me why
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!