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
kirill [66]
3 years ago
14

Can you answer these 3 questions for me plz

Mathematics
2 answers:
finlep [7]3 years ago
4 0
A.
1hr \: 15min = 75min

c = 0.22t = 0.22 \times 75 = 16.5

cost is $16.50

B.

26.40 = 0.22 \times t

rearrange to solve for t:

t = \frac{26.40}{0.22} = 120min

C. This is the same as part B, only the rate changed

t = \frac{26.40}{0.25} = 105.6min

they ask for the greatest number of minutes, so we round down (take the floor of the value).

the answer is 105 minutes.
victus00 [196]3 years ago
4 0
The cost is a function of time in minutes, and t represents minutes.

Part A.

1 hour + 15 minutes = 60 minutes + 15 minutes = 75 minutes

c = 0.22t

For 75 minutes, t = 75

c = 0.22 * 75

c = 16.5

Answer for Part A.: The cost of a 1 hour 15 minute call is $16.50

Part B.

Now we are given the cost, c, and we need to find t, the time in minutes.

c = 0.22t

26.4 = 0.22t

Divide both sides by 0.22

120 = t

t = 120

Answer to Part B.: 120 minutes.

Part C.

The new cost is now 0.25t.
We want the cost to be at most $26.40.
That means the cost must be less than or equal to $26.40.

0.25t \le 26.4

t \le 105.6

The number of minutes must be less than or equal to 105.6 minutes.
Since the calls are charged by whole minutes, the longest call can be 105 minutes.

Answer to Part C.: 105 minutes
You might be interested in
What is the value of x?
Tresset [83]

Answer:

i think its 8

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
The sum of three times a number and seven is greater than twice the number minus four
swat32
I'm guessing you want this written as an equation, so here it is.
3n+7>2(n-4)
These can be really tricky at times, so I suggest looking for "clues" in the wording, such as add, subtract, and other things. Also look for what numbers are "paired" together, like in parentheses. Hope that this helps!
4 0
3 years ago
Sara spent half of her allowance going to the movies. She washed the family car and earned 9 dollars. What is her weekly allowan
Genrish500 [490]
$7, I think. I would not be too sure about it, though.
3 0
3 years ago
Read 2 more answers
Which is equivalent?
Arlecino [84]

Steps to simplify:

(2x + 3)(x - 7)

~Use FOIL to multiply

(2x * x) + (2 * -7) + (3 * x) + (3 * -7)

~Simplify

=2x² - 14x + 3x - 21

~Combine Like Terms

2x² + (-14x + 3x) - 21

~Simplify

2x² - 11x - 21 (Option 2)

Best of Luck!

6 0
3 years ago
The perimeter of a triangle is 199 inches. If one side of the triangle is six more than the shorter side, and the longer side is
Keith_Richards [23]
Shortest side (a) = 58
middle side (b) = 64
longest side (c) = 77

the 3 sides a + b + c = 199
b = a + 6
c = a + 19

substitute your new values for b & c into your original formula, so:
a + (a+6) + (a+19) = 199
3a + 25 = 199
3a = 174
a = 58

then substitute 58 into your b & c formulas to figure out the rest
b = a + 6 = 58 + 6 = 64
c = a + 19 = 58 + 19 = 77

3 0
3 years ago
Other questions:
  • What is the solution to the system shown below y=2x-1. Y=2x+3 A (0,0). B(1,-3) C(-1,3). D no solution
    12·1 answer
  • Solve<br> 6x + 5 = 3x + 14<br><br> It needs to be written in a step by step way of how to do it xx
    13·2 answers
  • What are the values of c makes x^2 + 6x + c a perfect square trinomial? <br> 3<br> 6<br> 9<br> 12
    10·1 answer
  • Use Pascal's Triangle to expand (b - 3a)^4
    14·1 answer
  • -3√123 = -2√123 x _____ Fill in the blanks
    11·1 answer
  • 19 points
    8·1 answer
  • Please help don’t pass this question please help me out !
    10·2 answers
  • Find the slope of the line that contains the points named. G(3, -2), H(7, -2)
    8·2 answers
  • Maria wants to buy a pair of shoes for $32.50 and a shirt for $8.50. If the sales tax rate is 8.5%, what will be the amount of s
    7·1 answer
  • Y
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!