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
aalyn [17]
3 years ago
10

A school bought pens, each costing $1, and pencils, each costing $0.5. The cost of the whole purchase was $220. How many pens an

d pencils were purchased if there were 80 more pencils than pens?
Mathematics
1 answer:
Levart [38]3 years ago
5 0

Answer:

200 pencils and 120 pens

Step-by-step explanation:

Let the number of pencils be x while pens be y.

Considering the cost of whole purchase then, we get the equation

0.5x+y=220

Considering the number of items bought, then the equation is

x-y=80

Adding the two equations then we have

1.5x=300

x=300/1.5=200

Consideeing that x-y=80 and x is 200 then

200-y=80

y=200-80=120

Therefore, the pencils were 200 and pens 120 pieces

You might be interested in
Examine the pattern of numbers in the table , and find a formala for y in terms of x.
lana66690 [7]

Plotting the points could help you notice that they lie along a parabola. In particular, you can see that y is always 4 more than x^2.

So, the relation is

y=x^2+4

4 0
3 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=%5Cfrac%7Ba%5E%7B2%7D-1%7D%7B2-5a%7D%20times%20%5Cfrac%7B15a-6%7D%7Ba%5E%7B2%7D%2B5a-6%7D" id=
stepan [7]
\bf \cfrac{a^2-1}{2-5a}\times \cfrac{15-6}{a^2+5a-6}\\\\&#10;-----------------------------\\\\&#10;recall\quad \textit{difference of squares}&#10;\\ \quad \\&#10;(a-b)(a+b) = a^2-b^2\qquad \qquad &#10;a^2-b^2 = (a-b)(a+b)\\\\&#10;thus\quad a^2-1\iff a^2-1^2\implies (a-1)(a+1)&#10;\\\\\\&#10;now\quad a^2+5a-6\implies (a+6)(a-1)\\\\&#10;-----------------------------\\\\&#10;thus&#10;\\\\\\&#10;\cfrac{a^2-1}{2-5a}\times \cfrac{15-6}{a^2+5a-6}\implies \cfrac{(a-1)(a+1)}{2-5a}\times \cfrac{3(5a-2)}{(a+6)(a-1)}\\\\&#10;-----------------------------\\\\&#10;

\bf now\quad 3(5a-2) \iff -3(2-5a)\\\\&#10;-----------------------------\\\\&#10;thus&#10;\\\\\\&#10;\cfrac{\underline{(a-1)}(a+1)}{\underline{2-5a}}\times \cfrac{-3\underline{(2-5a)}}{(a+6)\underline{(a-1)}}\implies \cfrac{-3(a+1)}{a+6}
6 0
3 years ago
If the graphs of the linear equations in a system are the same line, what does that mean about the possible solution or solution
kvasek [131]
I think it’s c there are many solutions
8 0
3 years ago
Y = X - 4<br> Linear<br> Nonlinear
KengaRu [80]

Answer:

Linear

Step-by-step explanation:

There is a constant rate of change ( 1 ), and there is a y-intercept.

8 0
3 years ago
What is 23x92? Give brainliest.
Volgvan

Answer:

2116

Step-by-step explanation:

multiplication!

8 0
3 years ago
Read 2 more answers
Other questions:
  • Your height and weight are examples of which level of measurement? A. Ordinal B. Nominal C. Ratio D. Interval
    14·1 answer
  • Which set of rational numbers is correctly ordered from least to greatest? Group of answer choices A. −0.48, −0.47, −0.46, −0.45
    5·2 answers
  • A farmer has a field in the shape of a triangle. The farmer has asked the manufacturing class at your school to build a metal fe
    7·1 answer
  • W (-4 + z) = mz + 17
    15·1 answer
  • An article reported the following data on oxidation-induction time (min) for various commercial oils:87 105 130 160 180 195 135
    11·1 answer
  • Four ninths plus one ninth?
    15·2 answers
  • I walk each day to school. By what percentage would I need to increase my usual average speed in order for the journey to take 2
    9·1 answer
  • HELPPPP PLSSS!!! Find the distance between the points (-16, -10) and (6, -10). 20% 16 12 8 4 X -16 -20 -12 -8 -4 4 8 12 20 16 -4
    7·1 answer
  • You lose 2 points every time you forget to write your name on a test. You have forgotten to write your name 6 times. What intege
    15·2 answers
  • A line segment is defined by which of the following statements?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!