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
NARA [144]
3 years ago
6

Please help!!!!!!!!!!

Mathematics
2 answers:
Basile [38]3 years ago
6 0

Answer:

1-c

2-b

3-a

Step-by-step explanation:

1. 7y=14

y=2

-7y=-14

y=2

so the equation has one solution

2. 0=0

so the equation has infinite solution

3. 0=2 false

so the equation has no solution

Zanzabum3 years ago
3 0

<u>1 solution</u>

8x+7y=30

8x-7y=2

<u>infinitely many solutions</u>

-8x+7y=-2

8x-7y=2

<u>no  solution</u>

8x-7y=2

-8x+7y=2

Explanation

The number of solutions of a pair of linear equations are determined by the following criteria

1 solution

-a1/a2   \neq   b1/b2

in the first pair a1/a2=8/8=1

b1/b2=7/-7=-1

therefore a1/a2   \neq   b1/b2

infinitely many solution

a1/a2=b1/b2=c1/c2

In the second pair of equations -8x+7y+2=0 and 8x-7y-2=0

a1/a2=-8/8=-1\\b1/b2=7/-7=-1\\c1/c2=2/-2=-1

since a1/a2=b1/b2=c1/c2, the pair of equations have infinitely many solutions

no solution

a1/a2=b1/b2\neq c1/c2

in the third pair of equation

a1/a2=8/-8=-1\\b1/b2=-7/7=-1\\c1/c2=-2/-2=1

Here a1/a2=b1/b2\neq c1/c2

You might be interested in
The population of a city this year [2018] is 34,500. The population is expected to grow by 2% each year. What will be the popula
Talja [164]
The answer would be A. 39,300.

I got this by multiplying 34,500 by 2% and getting 690. Since 2018 is 7 years away from 2025, I multiplied 690 by 7 getting 4,830. I added the 4,830 to the original population of 34,500 and got my answer, 39,300. Hope I helped!
8 0
3 years ago
the length of a rectangle is 2 times in width if the perimeter of the rectangle is 36 in find its length and width​
Basile [38]

Answer:

Length=12 inches Width=6 inches

Step-by-step explanation:

X can stand for the width. 2x can stand for the length since it is twice the width. The perimeter would then equal 6x. 6x is equal to 36. Divide by 6 to isolate x. X equals 6 inches. So twice the width would be 12 inches.

8 0
3 years ago
A rhino can run at speeds of about 28 miles per hour. What is that speed in feet per second, to the nearest whole number?
mash [69]

28 mph is approximately 41.0666... fps.

This is because 1mph is approximately 1.4666... fps.

4 0
3 years ago
Read 2 more answers
If R is between A and D and<br> DR = 8 and DA = 15 then AR=
dolphi86 [110]

Answer:

7

Step-by-step explanation:

heres a model

A ----------R---------D

A ----?-----R----8---D

A----------15----------D

15 - 8 = 7

AR = 7

5 0
3 years ago
Maddyross91 ! i’ll give brainliest please help
frosja888 [35]

Answer:

Symbol

Step-by-step explanation:

the object <em>symbolizes</em> something else

4 0
2 years ago
Read 2 more answers
Other questions:
  • Simplify (5 x + 1) - (-10 x + 6)
    11·2 answers
  • Put 97.69 in word form
    14·2 answers
  • 9.(6.879) is it positive or negative
    9·1 answer
  • Evaluate the integral of arctan(1/x)
    6·1 answer
  • Frances has piano lessons every fourth day.
    10·1 answer
  • At 7 a.m. the temperature was 15 Fahrenheit below zero.By 2 p.m. the temperature rose 32 Fahrenheit and by 5 p.m.it dropped 10 F
    9·2 answers
  • A group of 9 friends went bowling. Each person pays the same amount to bowl several games and a $3 fee to rent shoes. The total
    10·1 answer
  • Maria bought seven boxes. A week later all her boxes were destroyed in a fire. There are now only 22 boxes left. With how many d
    15·1 answer
  • Describe what a graph of xs 1 would look like. (Be sure to include whether dot is open or closed and state
    10·1 answer
  • I like to eat apples and bananas
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!