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
sweet-ann [11.9K]
3 years ago
12

7x-6y=9 5x+2y=19 Solve the system using elimination.

Mathematics
1 answer:
ikadub [295]3 years ago
4 0

Step-by-step explanation:

multiply 5x+2y=19 by 3 youll get 15x+6y=57

eliminate y

7x-6y=9

<u>15x+6y=57</u><u> </u> +

22x=66

x=3

substitute x to 5x+2y=19

15+2y=19

2y=4

y=2

You might be interested in
How I know y=1/4x+1 is linear
photoshop1234 [79]
Use tI 84 calculator . 
go to y= and then plug the equation in the side then you will find the answer 


5 0
3 years ago
A certain lot consisting of ten items has three defective items and seven nondefective items. How many possible subsets of 2 ite
Charra [1.4K]

Answer:

45

Step-by-step explanation:

The order in which the items are chosen is not important. So we use the combinations formula to solve this question.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

How many possible subsets of 2 items can be chosen from this lot?

Combinations of 2 from a set of 10. So

C_{10,2} = \frac{10!}{2!(10-2)!} = 45

4 0
3 years ago
Number of real solutions?<br><br> 8x^2 - 11x = -3<br><br> -4x^2 - 4 = 8x
Anna71 [15]

(1) ANSWER

x =  \frac{3}{8}  \: or \:  x = 1

(2) ANSWER

x =  - 1

3 0
3 years ago
Help am stuckkkkk please help​
Otrada [13]

Step-by-step explanation:

it is a box or prism.

the volume is simply

length × width × height

in our case

8m × 6m × 5m = 240 m³

doubled dimensions means

16m × 12m × 10m = 1920 m³

the difference is

1920 - 240 = 1680 m³

we could have gotten the new volume also based on the original volume :

2×8m × 2×6m × 2×5m = 8m×6m×5m × 2×2×2 =

= the original volume (240 m³) × 8 = 1920 m³

3 0
2 years ago
A tackle box is a rectangular solid with sides of 15 in., 12 in., and 9 in. What is its volume?
Scrat [10]
The answer is  15 x 12 x 9= 1,620
4 0
4 years ago
Read 2 more answers
Other questions:
  • Determine whether the indicated value of x is a solution. <br> x + 9 = 6 if x = -4 <br> yes or no?
    12·1 answer
  • Bob rolls a fair six-sided die each morning. If Bob rolls a composite number, he eats sweetened cereal. If he rolls a prime numb
    13·1 answer
  • There is a circular park of radius 15 meters. Three friends Lillian, William, and Jacob are sitting at equal distance on its bou
    13·1 answer
  • Who get to the top first if one place get there three thirds time and the other one third
    14·1 answer
  • A soccer player is 30 feet from the goal line. He shoots the ball directly at the goal.
    15·1 answer
  • America is not a state, let alone a country, America is a CONTINENT.
    7·2 answers
  • Hi here is the problem
    9·1 answer
  • Hi my question is what is ma name?​
    6·2 answers
  • Algebra 1 - One question, I'm not sure how to solve and it's worth 4 marks. That means there are 4 things I must include in my a
    8·1 answer
  • Write an equation for the nth term of the arithmetic sequence 8, 3, -2, -7,... Find the 9th term of the sequence.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!