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
Thepotemich [5.8K]
3 years ago
12

Ava bought some pens for $ 2 each and some pencils for $ 1 each. She bought 3 more pens than pencils and spent a total of $ 12.

How many pencils did Ava buy?
Mathematics
1 answer:
Rudiy273 years ago
5 0

Answer:

Step-by-step explanation:

price of 1 pen= $ 2

price of 1 pencil= $1

total money spent= $12

Let the number of pen be a and number of pencil be b.

 2 a + b = 12   ----------------Equation 1

We have, she bought 3 more pens than pencils

  a - b = 3   ------------------  Equation 2

 Equation 1 +Equation 2,  

   2 a + b +  a - b = 12 + 3

                     3a = 15

                     a = 5

 Substituting in  equation

           5 - b = 3

               b = 2

 Number pencils Ava bought = 2

You might be interested in
Name a pair of corresponding angles
Gnoma [55]
<h3>Corresponding angles = angle 1 and angle 5</h3>

They are on the same side of the transversal cut (both to the left of the transversal) and they are both above the two black lines. It might help to make those two black lines to be parallel, though this is optional.

Other pairs of corresponding angles could be:

  • angle 2 and angle 6
  • angle 3 and angle 7
  • angle 4 and angle 8

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

<h3>Alternate interior angles = angle 3 and angle 5</h3>

They are between the black lines, so they are interior angles. They are on alternate sides of the blue transversal, making them alternate interior angles.

The other pair of alternate interior angles is angle 4 and angle 6.

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

<h3>Alternate exterior angles = angle 1 and angle 7</h3>

Similar to alternate interior angles, but now we're outside the black lines. The other pair of alternate exterior angles is angle 2 and angle 8

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

<h3>Same-side interior angles = angle 3 and angle 6</h3>

The other pair of same-side interior angles is angle 4 and angle 5. They are interior angles, and they are on the same side of the transversal.

6 0
3 years ago
Make X the subject of the formula<br><br><br>will mark brainliest!!​
irga5000 [103]

Answer:

y =  \frac{x + 2}{x - 4}  \\ xy - 4y = x + 2 \\ xy - x = 4y + 2 \\ x(y - 1) = 4y + 2 \\ x =  \frac{4y + 2}{y - 1}  \\  \boxed{x =  \frac{2(2y + 1)}{y - 1} }

hope this helps.

3 0
3 years ago
HEELLPP
Lana71 [14]

Answer: 7.8

Step-by-step explanation:

4 0
3 years ago
Find the value of n such that x^2-19x n is a perfect square trinomial.
Marianna [84]
B. 361/4
you get: x^2-19x+361/4=(x-19/2)^2
6 0
4 years ago
Read 2 more answers
if 22000 pots with 15 seeds each are used in a nursery, how many total seeds, in scientific notation?
kipiarov [429]

Write the total number of seeds in scientific notation

Given:

Number of pots = 22,000

Number of seeds = 15

<em>Total number of seeds = Number of pots × Number of seeds</em>

= 22,000 × 15

= 330,000

Scientific notation is written in multiples of 10

  • Count the number of digits
  • Insert a decimal point between the first digit and other digits
  • count the number of digits after the first digits
  • multiply by 10 raise to the power of number of remaining digits after first digits

= 3.30000 × 10^5

Therefore,

the total number of seeds in

scientific notation is 3.30000 × 10^5

Read more:

brainly.com/question/10401258

7 0
3 years ago
Other questions:
  • jack has 45 pencils and bella has 67 pencils jack wants to get equal with bella . How many pencils does bella have to give jack
    6·2 answers
  • What’s the answer to 3/4 +5/8
    7·1 answer
  • Please help it’s urgent!!!
    7·1 answer
  • Two values less than seven hundred three and forty seven thousandths
    10·1 answer
  • Answer it pls and explain too​
    15·1 answer
  • *20 points*
    14·1 answer
  • An article reported that for a sample of 58 kitchens with gas cooking appliances monitored during a one-week period, the sample
    7·1 answer
  • Nick and his family traveled by train to New York City. The clocks show when the train left the station and when it arrived in N
    12·1 answer
  • Simplify this problem::<br> -6x + 3 3/4 + 14x - 3.25
    11·1 answer
  • Solve simultaniously<br> 2x-y=3<br> 3x+2y=8
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!