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
Artyom0805 [142]
3 years ago
5

9. 3x + 9y = 18 y = x + 2 Substitution method

Mathematics
1 answer:
777dan777 [17]3 years ago
4 0

Answer:

x = 0

y = 2

Step-by-step explanation:

3x + 9y = 18 ---------eqn 1

y = x + 2---------eqn 2

Substitute eqn 2 into eqn 1, for the value of y

3x + 9( x + 2) = 18

3x + 9x + 18 = 18

12x + 18 = 18

12x = 18 -18

12x = 0

Divide both sides by 12 , to get the value of x.

12x/ 12 = 0/12

x = 0

Substitute x = 0 into eqn 2

y = x + 2

y = 0 +2

y = 2

Hint: to confirm the values

x = 0

y = 2

Let's take eqn 1 ,

3x + 9y = 18

3(0) + 9(2)

= 0 + 18

= 18

Correct

Let's take eqn 2

y = x + 2

Let's find y

y = 0 + 2

y = 2

Correct too

You might be interested in
Apples sell 5 for a $1.00 how much will 2 1/2 dozen cost
ch4aika [34]
2 and 1/2 dozen equals a total of 30. 5 goes into 30 six times, therefore you multiply $1.00 by 6 and this equals $6.00. <span />
8 0
3 years ago
Read 2 more answers
A project that you are working on requires 5 boards that are 6’ long, 4 boards that are 3’3” long, and 2 boards that are 18” lon
kenny6666 [7]

Answer:

Step-by-step explanation

There are 12 inches in a foot.

3'3" in inches is therefore 39 inches.

39 * 4 = 156 inches in total.

6 feet in inches = 72 inches.

72 * 5 = 360 inches

There are 2 boards which are 18 inches long. In total they will be 36 inches long.

360 + 156 + 36 = 552 inches.

Which equals 46 feet.

5 0
3 years ago
If the roots (x-2)^2=k are equal find the value of k
Olenka [21]

(x-2)^2=k\\x^2-4x+4=k\\Let\:x^2-4x+4=0, so \:x=2=>\\k=0

6 0
4 years ago
How many times must Henry fill a 350 mL cup to an empty 10.5 L sink that is filled with water?
Akimi4 [234]
10.5 L = 10500 mL
# times = 10500/350 = 30 times
5 0
3 years ago
Read 2 more answers
6-2
balandron [24]

Answer:

  Team 3 Turtle, by 4 minutes

Step-by-step explanation:

The speeds of each of the turtles can be computed from ...

  speed = distance/time

Then for each of the turtles, the training pace is ...

  Team 1 Turtle: (18 ft)/(6 min) = 3 ft/min

  Team 2 Turtle: (12 ft)/(4 min) = 3 ft/min

  Team 3 Turtle: (10 ft)/(2 min) = 5 ft/min

The times required to cover the 30 ft distance at these paces are ...

  time = distance/speed

  3 ft/min ⇒ (30 ft)/(3 ft/min) = 10 min

  5 ft/min ⇒ (30 ft)/(5 ft/min) = 6 min

The 2nd-place finishers will take 10-6=4 minutes longer.

The expected winner is Team 3 Turtle by 4 minutes.

5 0
3 years ago
Other questions:
  • 52 is what percent of 50
    9·2 answers
  • Please help, I am conpuzzled.
    7·1 answer
  • Can someone help with this question please?
    12·1 answer
  • Sarah said that when you multiply two fractions that are both less than 1, you may sometimes get a product that is equal to or g
    10·1 answer
  • Which represents the equation of the line? *
    6·1 answer
  • 10 is 40 percent of what number?
    14·1 answer
  • HELP!!! WHATS THE ANSWER PLS HELP-
    7·1 answer
  • PLZ ANSWER ASAP!!!!!!!!!!!!!!!!!!!!!!!!!
    10·2 answers
  • Find the area of the composite figure.​
    7·2 answers
  • What is the quotient?<br> 7^-4/7^-9<br><br> O1/7^13<br> O1/7^5<br> O 7^5<br> O 7^13
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!