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
melomori [17]
2 years ago
15

A necklace and earrings cost $144. Six necklaces and five pairs of earrings cost $825

Mathematics
1 answer:
hram777 [196]2 years ago
6 0

Step-by-step explanation:

let necklace : x

let earrings : y

x+y=144 -1st eqn

6x+5y=825 -2nd eqn

y=144-X -3rd eqn

substitute eqn into 2nd eqn

6x+5(144-x)= 825

6x +720-5X =825 (expanded)

X = 825-720

X =105

substitute "X=105" into 1st eqn

(105)+y=144

y= 144-105

y=39

1 necklace = 105$

1 pair of earrings = 39$

(to check back: substitute the value into the original eqn)

You might be interested in
The function h(t) = -16t^2 + 144 represents the height, h(t), in feet, of
Marrrta [24]
- 16t^2 +144 you can rewriting in this form 144 -16t^2 = (12 -4t)(12+4t)

12-4t=0

12 =4t  divide both sides by 4

t=3

hope helped 
5 0
3 years ago
Simplify (5 + 1)2 - (11 + 32) + 4.
4vir4ik [10]

Answer:

6

Step-by-step explanation:

The trick here is to know PEMDAS.

PEMDAS stands for: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.

This is the order in which you should simplify a problem.

Parentheses:

   (5 + 1)^2 - (11 + 32) + 4

   (6)^2 - (43) + 4

Exponents:

   (6)^2 - (43) + 4

   36 - 34 + 4

We have no multiplication or division, so we can skip those steps.

Addition:

   36 - 34 + 4

   40 - 34

Subtraction:

   40 - 34

   6

So 6 is our answer.

5 0
3 years ago
Read 2 more answers
He gets paid £6.80 per hour<br> how many hours for 9 and half hours
Akimi4 [234]

Answer: 64.60

Step-by-step explanation:

lets do 6.80x9

= 61.20

for the half an hour, divide 6.80 by 2

it would be 3.40

61.20+3.40= 64.60

5 0
3 years ago
Read 2 more answers
Which is SMALLER, -6.3 or -6.1?
Dominik [7]
I believe the answer is -6.3

my explanation is because -6.3 is less than -6.1 so technically it makes it smaller. if you were to add to -6.3 you would get -6.1 on the x axis.
6 0
2 years ago
Write 9.68 x 104 in standard form?
-Dominant- [34]

Answer:

1006.72

Step-by-step explanation:

Multiply 9.68 by 104

7 0
3 years ago
Read 2 more answers
Other questions:
  • What is 12,430,000 in expanded form
    15·2 answers
  • The pythagorean theorem is true for some right triangles but not all
    7·2 answers
  • Amy can ride her bike 4 miles in 30 minutes. Sebastian can ride his bike 3 miles in 24 minutes. How long, in miles, does it take
    12·2 answers
  • 11. Find the surface area of each figure. Leave the answers in pi where applicable. Show work
    5·1 answer
  • You conduct a hypothesis test for the mean of a population (H0 : p = 5) at the .05 significance level.
    5·1 answer
  • A shopkeeper sells an article of 400, while he purchases it for 402. Find out loss percent of shop keeper​
    8·1 answer
  • The seventh-grade class is building target areas for a PE activity. The bases for the game will be in a circular shape. The diam
    6·2 answers
  • How do you graph it.where are the roots located?
    14·1 answer
  • How many solutions does -6p + 7 = 7 - 6p have?
    14·1 answer
  • kelly can paint her father's shed in five hours, working alone. working together, she and her sister sharon can complete the tas
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!