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
puteri [66]
3 years ago
14

Solve the system of linear equations by elimination −2x+3y=7 and 5x+8y=−2

Mathematics
1 answer:
forsale [732]3 years ago
4 0
You would need to make them eliminate so I would multiply the entire first one by 2.5 to make the X's cancel out. So you would end up with -5X+7.5Y=17.5. The X's would cancel and you would be left with 15.5Y=15.5. So Y=1. Then replace Y into one of the equations. I'm going to use the top again. -2X+3(1)=7. Subtract 3 from both sides to get -2x=4. Divide both sides by negative 2 to get X=-2. So the solution would be (-2,1)
You might be interested in
What is five times the number of books in the library?
lord [1]
I assume this an algebraic expression..sooo the variable L will represent the number of books in the library, and five times the number of books in the library would be 5L
3 0
3 years ago
Read 2 more answers
Pirate Jack has an equal number of gold and silver coins. If Pirate Jack splits all of his coins into 7 equal piles for his parr
Tcecarenko [31]

Answer:

The least possible number of coins the Pirate has = 81

Step-by-step explanation:

Given:

Pirate Jack has equal number of gold and silver coins.

When the pirate splits the coins into 7 equal piles he has 4 coins left.

When the pirate splits the coins into 11 equal piles he has 4 coins left.

Every pile has at least 1 coin.

To find the least possible number of coins Pirate Jack has.

Solution:

In order to find the least possible number of coins pirate Jack has, we must find the least common multiple of the number of piles the coins are split into.

So, the least common multiple of 7 and 11 can be found by listing the multiples.

7= 7,14,21,28...............,77

11=11,22,33,44,55,66,77

So, we find the least common multiple of 7 and 11 is 77.

Number of coins left = 4

Total number of coins the pirate must have = 77+4 =81

We can check the answer by dividing 81 by 7 and 11. I both cases we get remainder = 4.

So, the least possible number of coins the pirate has = 81

6 0
4 years ago
A 12-foot ladder rests against a brick wall at angle of 60°. Which expression gives the value of x, the height on the brick wall
Ede4ka [16]

the diagonal of the triangle representa the lenght of the ladder  and is 12 foot

as the Sen alpha = CO/H, OF THIS FORMULA , CO IS THE HICK OPPOSITE AND REPRESENT THE  HEIGHT

CO = Sen alpha*H = Sin (60°)* 12 = 10,39 FOOT

8 0
3 years ago
4. You work in the upholstery department of a furniture factory.
Wewaii [24]

Answer:

a. $1360

b. $8.50 per hour

Step-by-step explanation:

a.

5 couches upholstered, each 105 equals 5 * 105 = 525

6 loveseats upholstered, each 85 equals 6 * 85 = 510

5 chairs upholstered, each 65 equals 5 * 65 = 325

Hence, total pay = 525 + 510 + 325 = $1360

b.

To find hourly rate, we take total amount and divide it by number of hours.

1360/160 = $8.5 per hour

Hence, hourly rate is $8.50 per hour

4 0
3 years ago
A new CD player costs $65. Mindie waits until it is 25% off to buy it. Find the sale price that Mindie pays for the new CD playe
Oksanka [162]

Answer:

48.75

Step-by-step explanation:

25 percent off 65.00 is 48.75

The difference is 16.25

4 0
4 years ago
Read 2 more answers
Other questions:
  • Expressions that simplify to the same expression are called ____ expressions.
    5·2 answers
  • The scale model of a rectangular garden is 1.5 ft by 4 ft. The scale model is enlarged by a scale factor of 7 to create the actu
    13·2 answers
  • Please answer my questions :)
    7·1 answer
  • Solve the triangle. A = 51°, b = 14, c = 6
    15·1 answer
  • What is the area of this circle? Show work please. The number in the circle is 3.
    7·1 answer
  • Suppose a normal distribution has a mean or 70 and a standard deviation of 7. What is P(x>=94)? O A. 0.075 O 8. 0.025 c. 0.84
    15·1 answer
  • Plzz help what is the domain of the given function​
    7·1 answer
  • If sin 0 =<br> 6<br> 12<br> find cos 0 and sin 8.
    5·1 answer
  • Plss helppp meee i really need it
    14·1 answer
  • Solve inequality 4|6x-6|+8&gt;80 please help only if you understand
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!