MATHEMATICS HIGH SCHOOL

What's y in: 21y=(-205) +75+47y

Answers

Answer 1
Answer: The Answer Is A Fraction y= 151/47
Answer 2
Answer: 21y=−205+75+47ySimplify: (Show steps)21y=(47y)+(−205+75)(Combine Like Terms)21y=47y+−13021y=47y−130Step 2: Subtract 47y from both sides.21y−47y=47y−130−47y−26y=−130Step 3: Divide both sides by -26.‌−26y−26‌=‌−130−26‌y=5

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PLZ HELP URGENT!!!!!!!!!f(x) = -3x2 + 2x - 7


f(-1) =

A) -12
B) -8
C) -6
D) 0

Answers

Is that - 3x times 2?

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Answers

Answer:

Step-by-step explanation:

x^4 · x^-2 = x^(4-2)= x^2 is the answer

Determine the number of solutions to a system of equations.y = -6x-2, y = -6x-2
One Solution
No Solution
Infinitely Many Solutions
y = 0.5x + 5, y = 0.5x + 1
y = 0.25x - 2. y = 5x - 4
y = 2x + 3. y = 4x -1
y = 2x + 1.5, y = 2x + 1.5
y = -x - 3y = -x + 3

Answers

y = - 6x - 2 and y = - 6x - 2 has infinitely many solutions.

y = 0.5x + 5 and y = 0.5x + 1 has no solution.

y = 0.25x - 2 and y = 5x - 4 has one solution.

y = 2x + 3 and y = 4x -1 has one solution.

y = 2x + 1.5 and y = 2x + 1.5 has infinitely many solutions.

y = -x - 3 and y = -x + 3 has has no solution.

What is a linear equation?

A connection between a number of variables results in a linear model when a graph is displayed. The variable will have a degree of one.

The linear equation is given as,

y = mx + c

Where m is the slope of the line and c is the y-intercept of the line.

  • If the slopes are different then one solution.
  • If the slopes are the same but intercepts are different then no solution.
  • If the slopes and intercepts are the same then infinitelymany solutions.

y = - 6x - 2 and y = - 6x - 2 has infinitely many solutions.

y = 0.5x + 5 and y = 0.5x + 1 has no solution.

y = 0.25x - 2 and y = 5x - 4 has one solution.

y = 2x + 3 and y = 4x -1 has one solution.

y = 2x + 1.5 and y = 2x + 1.5 has infinitely many solutions.

y = -x - 3 and y = -x + 3 has has no solution.

More about the linear equation link is given below.

brainly.com/question/11897796

#SPJ2

Step-by-step explanation:

When we compare 2 system of equations (of the form y = mx + c), we take note of the following things:

  • If the values of m and c in both equations are the same, they have infinitely many solutions
  • If only the value of m is the same, they have no solutions
  • If neither is the same, they have 1 solution

Bearing this in mind, we have the following answers:

y = -6x - 2 and y = -6x - 2

=> Infinitely many solutions

y = 0.5x + 5 and y = 0.5x + 1

=> No solutions

y = 0.25x + 2 and y = 5x - 4

=> 1 solution

y = 2x + 3 and y = 4x - 1

=> 1 solution

y = 2x + 5 and y = 2x + 5

=> Infinitely many solutions

y = -x - 3 and y = -x + 3

=> No solutions

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Answers

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The answer is B?amandiodosoenwjdid

Connecting a DVD player to a television set requires a cable with special connectors at both ends. You buy a six-foot cable for $15.50 and a three-foot cable for $10.25. Assuming that the cost of a cable is the sum of the cost of the two connectors and the cost of the cable itself, what is the cost of a four-foot cable?

Answers

so a 3 foot cable is10.25
a 6foot cable is 15.50
so
x=cost per foot
y=cost of special connectors
3x+y=10.25
6x+y=15.50
make first equation negative and add to the first
3x=5.25
divide both sides by 3
1.75=x
so it costs 1.75 for a foot of cable

subtitue into first equation
3(1.75)+y=10.25
5.25+y=10.25
subtract 5.25 from both sides
y=5 dollars=cost of special so
4x+y=4(1.75)+5=7+5=$12

so the cost of a 4 foot cable is $12

Which counterexample shows that the conjecture "all mammals live on land" is false?

Answers

Answer:

B. A whale is a mammal that does not live on land.

Step-by-step explanation:

Self explanitory

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