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
lions [1.4K]
3 years ago
15

A local high school held a two-day fundraiser selling lunches. The equations shown represent the amount of money the school coll

ected during the two days. {12x + 4y = 15232x + 12y = 420 In the equations, x represents the cost of a chicken lunch and y represents the cost of a vegetarian lunch. Which is the cost of the vegetarian lunch?
Mathematics
1 answer:
Over [174]3 years ago
6 0

Answer:

  11

Step-by-step explanation:

The two equations appear to be ...

  • 12x +4y = 152
  • 32x +12y = 420

These can be solved for y using Cramer's rule:

  y = (152(32) -420(12))/(4(32) -12(12)) = -176/-16 = 11

The cost of the vegetarian lunch is 11.

_____

<em>Comment on Cramer's Rule</em>

For equations ...

  ax +by =c

  dx +ey = f

The solutions are ...

  x = (bf -ey)/(bd -ea)

  y = (cd -fa)/(bd -ea) . . . . note the denominators are the same expression

Once you memorize the pattern of products, this can be the simplest way to solve a pair of equations--especially if you only need one of the variable values.

You might be interested in
Protest question please help ASAP
Anna71 [15]

To find the correct order of similarity we see and compare the sides of both the trapeziums

LM corresponds to QR

KL to PQ

NM to SR

So the correct order should be

KLMN-PQRS

So first Option is correct

8 0
4 years ago
Find the distance between the points U(11, -2), V(-1,3)​
Musya8 [376]
Hopefully this answered your question!

5 0
3 years ago
PLEASE HELP I NEED HELP 10 POINTS
mestny [16]

Answer:

A kite with a 100 foot-long string is caught in a tree. When the full length of the string is stretched in a straight line to the ground, it touches the ground a distance of 30 feet from the bottom of the tree. Find the measure of the angle between the kite string and the ground.

17°

27°

63°

73°Step-by-step explanation:

8 0
3 years ago
The simplest radical form of the radicand 32
diamong [38]
Your answer is 4 radical 2.
5 0
3 years ago
Find the measures of angles x and y in the figure.
olasank [31]

y = 90° (linear pair)

x = 180° - (50° + 90°) [Angle Sum Property]

x = 180° - 140°

x = 40°

=》 x = 40° & y = 90°

______

Hope it helps ⚜

6 0
3 years ago
Read 2 more answers
Other questions:
  • Eight minus the quotient of two and the number X
    8·1 answer
  • An item is regularly priced at $60 . It is on sale for 20% off the regular price. How much (in dollars) is discounted from the r
    12·2 answers
  • Does anybody get this or am I the only one confused?
    8·2 answers
  • What is the volume of the prism?
    6·2 answers
  • 159,156,153 find the 37th term
    5·1 answer
  • HELP I NEED HELP ASAP
    14·1 answer
  • Mr.Sasi paid $152 for a pair of shoes and a belt. The pair of shoes cost 7 times as much as the belt. He also bought a shirt whi
    8·1 answer
  • A line passes through the point (10,-3) and has a slope of -1/2. Write an equation in point-slope form for this line.
    6·1 answer
  • With step by step please :)
    10·1 answer
  • Dylan has 1,024 in credit card debt. The credit card has an APR of 15% and is compounded monthly. If he pays 300 per month, how
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!