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
mote1985 [20]
3 years ago
6

4) Solve each pair of simultaneous equations.

Mathematics
1 answer:
Mkey [24]3 years ago
7 0
4) a. x+y=1–(1)
y=2x-8—(2)
(2) into (1)
x+(2x-8)=1
3x-8=1
3x=1+8
x=9/3
x=3—(3)
(3) into (2)
y=2(3)-8
y=-2

ans x=3, y=-2

b. x+y=19—(1)
y=5x+1—(2)

(2) into (1)

x+(5x+1)=19
6x+1=19
6x=19-1
x=18/6
x=3—(3)

(3) into (2)

y=5(3)+1
y=16

ans x=3, y=16

c.x+y=-2—(1)
y=x-10—(2)

(2) into (1)

x+(x-10)=-2
2x-10=-2
2x=-2+10
x=8/2
x=4–(3)

(3) into (2)
y=4-10
y=-6

ans x=4, y=-6


5) 3x=y—(1)
x=y-16–(2)

(2) into (1)

3(y-16)=y
3y-48=y
2y=48
y=48/2
y=24–(3)

(3) into (2)

x=24-16
x=8

ans x=8, y=24
You might be interested in
3x + 5 = x - 3
dusya [7]

Answer:

x = -4

Step-by-step explanation:

3x + 5 = x - 3

Subtract x from each side

3x+5-x = x-3-x

2x+5 = -3

Subtract 5 from each side

2x+5-5 = -3-5

2x = -8

Divide each side by 2

2x/2 = -8/2

x = -4

7 0
2 years ago
Read 2 more answers
Help pls help plsssssss
densk [106]

Answer:

bro its 10

Step-by-step explanation:

5 kilometers in 30mins and if he stayed at the same rate for an hour he would have ran 10 kilometers cause 5 x 2 = 10

8 0
2 years ago
Round 96.466 to the nearest hundredth=
DedPeter [7]
96.47 would be your answer rounded to the nearest hundredth
3 0
3 years ago
Read 2 more answers
The ratio of black bags to blue bags is 5 to 3. If there are a total of 40 bags,
Simora [160]

Answer:

24

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Help me solve this question!
MakcuM [25]

Answer:

1st quartile is 136

The second quartile is also the median 142

The third quartile is 162

The interquartile range is the difference between the 3rd and first quartile or 26

Step-by-step explanation:

5 0
2 years ago
Other questions:
  • Does the value given for x make the equation true or false? 4x – 5 = 11; x=4
    14·2 answers
  • What is the lowest number 588 can be multiplied by so that the result is a squared number?
    11·1 answer
  • Bacteria can multiply at an alarming rate when each bacteria splits into two new cells, thus doubling. If we start with only one
    12·1 answer
  • What is the constant of proportionality in the equation y = 2/3x?
    7·1 answer
  • Estimate 8 2/9- 3 6/7
    14·1 answer
  • According to Edmunds, the average price that shoppers paid for a new car is $30,320. Assume that the standard deviation for the
    15·1 answer
  • Extra p!<br> Someone help me, Thanks!!
    9·2 answers
  • Hello good day <br>can you help me please:(​
    14·1 answer
  • Which choice is the correct graph of Ix &lt;3?
    5·1 answer
  • WILL MARK BRAINLIEST!!
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!