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
JulijaS [17]
3 years ago
10

Solve the system of equations by substitution. Show the steps that correspond with the substitution method.

Mathematics
1 answer:
Makovka662 [10]3 years ago
7 0

5x - 2(-2x - 5) = 19

5x + 4x +10 = 19

9x + 10 = 19

9x = 9

x = 1

y = -2(1) - 5

y = -2 - 5

y = -7

You might be interested in
I need help with this math problem
klemol [59]

Answer:

x = 15

Step-by-step explanation:

The right angle is formed at at the tangent line and the radius

So to solve for the missing angle we can solve for x using the Pythagorean Theorem

The Pythagorean theorem states that the sum of the two legs squared equal the hypotenuse squared

Knowing this we can create an equation to solve for x

12^2+9^2=x^2

now we solve for x

12^2=144\\9^2=81\\81+144=225\\225=x^2\\\sqrt{225} =15\\\sqrt{x^2} =x\\x=15

So we can conclude that x = 15

6 0
3 years ago
The gas tank of a 2013 Honda Accord holds 17.2 gallons. How many pounds of carbon dioxide are produced by burning an entire tank
cricket20 [7]
One gallon of gasoline (6.3 lbs.) produces about 20 lbs. of carbon dioxide. This may seem weird and untrue, however, most of that weight comes from the oxygen in the air. Following the math on this means that we multiply 17.2 gallons of gas by 20 lbs. of co2 per gallon of gas burned. 
This gives us the answer of 344 lbs. of carbon dioxide burned per tank of gas. (From a 2013 Honda Accord)
8 0
3 years ago
If a circle has a radius length of 2x units, what is the circle's circumference?
Brut [27]

Answer: 12.56

Step-by-step explanation:

If I remember correctly, the equation for circumference is C=2r*pi (R representing radius). For this problem, if 2 is your radius 2R would equal 4. Take this number and multiply it by 3.14 (pi) to get your final answer.

4 0
3 years ago
A quarter coin is tossed two times. What is the probability that the coin will land heads up both times?
Brut [27]

Answer:

1 in 4 chance

Step-by-step explanation:

because if it is a 50% chance to get heads on one toss, then for two tosses you have to multiply 1/2 * 1/2 and that equals 1/4

8 0
3 years ago
A four pack of batteries cost 5.16 at this price what is the cost of
Genrish500 [490]

Answer:

1.29 for 1 pack

Step-by-step explanation:

5.16/4=1.29

7 0
3 years ago
Other questions:
  • In the past two weeks, Sue earned $513 at her part-time job. She worked a total of 54 hours. About how much did she earn per hou
    10·2 answers
  • Determine whether the polynomial is a difference of squares and if it is, factor it.
    8·1 answer
  • Can someone help me please?
    10·1 answer
  • How does the relationship between multiplication and division help you divide rational numbers?
    10·2 answers
  • What's the answer to number 7
    8·2 answers
  • Maria got a job at Walmart. She makes $15 an hour plus an additional S3 dollars for overtime hours. If she
    6·2 answers
  • 11. Robby walks 4 blocks east and 3 blocks north to get to school from his house, as
    11·1 answer
  • Plz help it’s due today
    15·1 answer
  • You roll a single 6 sided die. What are the odds of rolling a 9?
    5·1 answer
  • What is the slope of the line?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!