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
asambeis [7]
2 years ago
13

12. If 3x + 4y = -1 and x - 2y = 3, then y=

Mathematics
1 answer:
Hatshy [7]2 years ago
6 0

y=3 and x= 5

Step-by-step explanation:

  • 3×+×=-1 and 4y-2y=3
  • 4×=1 and 2y=3
  • ×=4-1 and y=3+2
  • x=3 and y=5
You might be interested in
Your work or words should justify your answer (explain how you know). As a math teacher, Josie frequently makes photocopies of f
Doss [256]

Answer:

Yes, because by dividing x by his equivalent y, you find a constant of proportionality being 10.

x / y = 10

Step-by-step explanation:

20 / 2 = 10

50 / 5 =10

60 / 6 = 10

70 / 7 = 10

7 0
2 years ago
1. The amount of money Travis earns is given in the table.
Anastaziya [24]

Answer:

  $250

Step-by-step explanation:

The numbers in the table indicate a proportional relationship between earnings and hours worked. Among other things, that means you can find the earnings for 20 hours by using any table values that sum to 20 hours.

For example, 9 hours + 11 hours = 20 hours, so the earnings would be ...

  $112.50 +137.50 = $250.00 . . . for 20 hours

You could also use 4×5 hours = 20 hours, so ...

  4×$62.50 = $250 . . . for 20 hours

__

Or, you can figure ...

  $37.50/(3 h) = $12.50/h

so the pay for 20 hours is ...

  (20 h)×($12.50/h) = $250.00

3 0
2 years ago
Read 2 more answers
One weekday, the ticket sales person at a bus station asks every 10th ticket buyer if they had planned to use a laptop computer
andrew-mc [135]

From the 3100 weekday bus traveler, 310 travelers will be asked by the sales person. And for every 2.685 traveler questioned, a traveler will say yes. So there will be 115 bus travelers that will use a laptop computer while travelling.

8 0
2 years ago
if the vertex of a parabola is (-4,6) and another point on the curve is (-3,14), what is the coefficient of the squared expressi
Softa [21]

Answer:

8

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

Here (h, k) = (- 4, 6 ), thus

y = a(x + 4)² + 6

To find a substitute (- 3, 14) into the equation

14 = a(- 3 + 4)² + 6 ( subtract 6 from both sides )

8 = a

Thus the coefficient of the x² term is a = 8

3 0
2 years ago
Can someone answer these questions for me?
WITCHER [35]
24cm
26cm
5cm
4cm
25cm
28cm
24*5*25=125*24=3000
26*4*28= 2918
the oat cereal has a greater volume than the rice cereal
6 0
3 years ago
Other questions:
  • Order of operations with negative numbers!
    11·1 answer
  • What's the answer someone pleaseeeee tell me
    9·1 answer
  • How do i divide 4/9 divided by 15/8
    11·1 answer
  • 0.16728 divided by 3.4
    7·2 answers
  • You must show all steps and provide any evidence needed in your solution to receive full credit.
    10·1 answer
  • A triangular playground has angles with measures in the ratio 8:3:9. What is the measure of the smallest angle? I need an explan
    7·1 answer
  • 11.1 billion dollars is spent on line over the Thanksgiving weekend. An amount that is equal to 1.05% of that is given to charit
    11·2 answers
  • What is the area of a square with sides of length 2 1/2 cm?
    9·2 answers
  • Can someone please help me?
    8·1 answer
  • How much greater is 8 than –3?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!