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
padilas [110]
3 years ago
15

Audrey has $120 to spend on a tennis racket and lessons. The racket costs $45 and the lessons cost $15 per hour. Define a variab

le. Then write and solve an equation to find how many hours of lessons she can afford.
Mathematics
1 answer:
vodka [1.7K]3 years ago
7 0
I would do 120 - 45. Now that she has 75 left I would do 75 - 15 * 3 Since 45 Is all that she has left.

If I were you choose a variable I would say h for hours. And h is equal to 3.

In result the whole equation would be 120 - 45 - 15 * h but since h is equal to 3 , We can write it as 120 - 45 - 15 * 3. Leaving Audrey with $30 left.

Correct me if I am wrong :)
You might be interested in
Every prime number greater than 10 has a digit in the ones place that is include in wich set of numbers A- 1,3,7,9 B-1,3,5,9 D-1
marta [7]

That's very interesting.  I had never thought about it before.
Let's look through all of the ten possible digits in that place,
and see what we can tell:

-- 0:
   A number greater than 10 with a 0 in the units place is a multiple of
   either 5 or 10, so it's not a prime number.

-- 1:
    A number greater than 10 with a 1 in the units place could be
    a prime (11, 31 etc.) but it doesn't have to be (21, 51).

-- 2:
   A number greater than 10 with a 2 in the units place has 2 as a factor
   (it's an even number), so it's not a prime number.

-- 3:
   A number greater than 10 with a 3 in the units place could be
   a prime (13, 23 etc.) but it doesn't have to be (33, 63) .

-- 4: 
   A number greater than 10 with a 4 in the units place is an even
   number, and has 2 as a factor, so it's not a prime number.

-- 5:
   A number greater than 10 with a 5 in the units place is a multiple
   of either 5 or 10, so it's not a prime number.

-- 6:
   A number greater than 10 with a 6 in the units place is an even
   number, and has 2 as a factor, so it's not a prime number.

-- 7:
   A number greater than 10 with a 7 in the units place could be
   a prime (17, 37 etc.) but it doesn't have to be (27, 57) .

-- 8:
   A number greater than 10 with a 8 in the units place is an even
   number, and has 2 as a factor, so it's not a prime number.

-- 9:
   A number greater than 10 with a 9 in the units place could be
   a prime (19, 29 etc.) but it doesn't have to be (39, 69) .

So a number greater than 10 that IS a prime number COULD have
any of the digits  1,  3,  7,  or  9  in its units place.

It CAN't have a  0,  2,  4,  5,  6,  or  8 .

The only choice that includes all of the possibilities is  'A' .

4 0
3 years ago
Evaluate each expression
solmaris [256]

Answer:

4 * 4 ÷ 4 = 4

8 ÷ (2*2) = 2

Step-by-step explanation:

4 * 4 \div4\\\rule{150}{0.5}\\\text{Use PEMDAS}\\\\4 * 4 \div4\\\\4 * 1\\\\\boxed{4}

==============================

8 \div (2*2)\\\rule{150}{0.5}\\\text{Use PEMDAS}\\\\8 \div (2*2)\\\\8 \div 4\\\\\boxed{2}

I hope this helps.

5 0
3 years ago
Find the product.<br><br> (-5a ^2)^3 · a^5
GrogVix [38]

Answer:

<u><em>−125a^(11)</em></u>

Step-by-step explanation:

<u><em>(−5a^(2)3a^(5) Then you solve</em></u>

<u><em>=−125a^(11)</em></u>

4 0
3 years ago
HELP PLEASE!!!!!!!! I GIVE 21 POINTS!!!!!!!!! AND BRAINLEAST &lt;3
REY [17]

6. domain=age

range= number of pets

it is not a function because an x value repeats


7. domain=1,2,3,4,5

range= 50, 100, 150, 150, 200

it is a function because the lines don't connect

7 0
4 years ago
A leak in a water tank causes the water level to decrease by 3.6×10−2 millimeters each second. About how many millimeters does t
Paladinen [302]
For this case, the first thing you should do is multiply the rate of decrease by time.
 We have then:
 (3.6 × 10-2) * (1.8 × 104)
 = 648 mm
 We are going to convert this number into scientific notation:
 = 6.48 * 10 ^ 2 mm
 Rounding we have:
 = 6.5 * 10 ^ 2 mm
 Answer:
 
The water level in the tank decreases in 6.5 * 10 ^ 2 millimeters in 5 hours
4 0
3 years ago
Other questions:
  • A study was done to compare people's religion with how many days that they have said they have been calm in the past three days.
    10·1 answer
  • Which expression is equivalent to
    15·2 answers
  • Instead of dividing 220 x 5 double both numbers and mentally calculate the quotient
    9·1 answer
  • 6/7 Find the slope of the line.
    13·2 answers
  • So llike a lil bit of help here?????
    7·1 answer
  • Find the value of the variables in the simplest form
    10·2 answers
  • If 48X^2,64x^4 ,x 36x^2 are in proportion , find the value of x​
    12·1 answer
  • What letter is used to represent scale factor ?
    13·1 answer
  • If the sales tax rate is 6%, find price of the shirt after sales tax on a shirt that costs $30.
    9·1 answer
  • 9x + 1 = -26 what is the value of x
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!