MATHEMATICS HIGH SCHOOL

Once you have a single variable isolated in one of the two equations in a system, the second step of using substitution to solve the system of equations is to __________. A. solve for the second variable in the other equation. B. solve for the second variable in the same equation. C. substitute the expression equal to the solved variable into the other equation. D. substitute the expression equal to the solved variable into its original equation.

Answers

Answer 1
Answer:

Answer:

Step-by-step explanation:

Given that there is a system of equations in two variables. When we have a single variable isolated in one of the two equations in a system, we can use substitution method.

So we substitute this variable in terms of other variable in the second equation so that we get now an equation in one variable.  We can solve this by mathematical operations easily.

Hence correct answer is

C. substitute the expression equal to the solved variable into the other equation.
Answer 2
Answer: I think C, not sure though :)

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WHAT ARE THE FOUR MAIN CYCLES THAT OCCUR IN NATURE PLZ HELP

Answers

Rock, Carbon, Water, Nitrogen
Water, Carbon Nitrogyn and Rock i believe so yeah that guys right

A pool shaped like a rectangle prism is 40 feet long 20 feet wide and 4 feet deep attached to the side of the pool is a hot tub with 1/4 the volume of the pool what is the total volume of the pool and hot tub?

Answers

V=legnth times width times height
pool=40 by 20 by 4
pool=40 times 20 times 4
pool=3200 ft^3
hot tub is 1/4 of pool
hot tub=1/4 times 3200=800

total is pool+hot tub=3200+800=4000 ft^3

Which of the following is the most appropriate unit to describe the rate at which water flows over Niagara Falls? Day per billion gallons, because the independent quantity is volume of water in billion gallons and dependent quantity is time in days

Billion gallons per day, because the independent quantity is volume of water in billion gallons and dependent quantity is time in days

Billion gallons per day, because the independent quantity is time in days and dependent quantity is volume of water in billion gallons

Day per billion gallons, because the independent quantity is time in days and dependent quantity is volume of water in billion gallons

Answers

I'd have to say the second option, "Billion gallons per day, because the independent quantity is volume of water in billion gallons and dependent quantity is time in days"

Answer:

The answer is C, "Billion gallons per day, because the independent quantity is time in days and dependent quantity is volume of water in billion gallons"

Step-by-step explanation:

Need help ??? Show work

Answers

Answer:

Amanda looks to be right?

4. Nick deposited $4,000 in a 4 year CD account that pays 4.18% interest, compoundedweekly. What is the ending balance?

Answer-

Answers

Answer:

The balance in Nick's CD account after 4 years would be approximately $4,702.79.

Step-by-step explanation:

To calculate the ending balance of Nick's CD account, you can use the compound interest formula:

A = P(1 + r/n)^(nt)

Where:

A = the future value of the investment/ending balance

P = the principal amount (initial deposit) = $4,000

r = the annual interest rate (in decimal form) = 4.18% or 0.0418

n = the number of times that interest is compounded per year = 52 (weekly compounding)

t = the number of years the money is invested for = 4 years

Now, plug these values into the formula and calculate:

A = 4000(1 + 0.0418/52)^(52*4)

A = 4000(1 + 0.00080384615)^(208)

A ≈ 4000(1.00080384615)^208

A ≈ 4000 * 1.17569743

A ≈ $4,702.79

Simplify completely quantity 2 x squared plus 13 x plus 20 all over x squared minus 5 x minus 36 .1. 2 open parentheses 13 x plus 5 close parentheses over 5 x minus 9
2. 2 open parentheses x plus 10 close parentheses over x minus 9
3. quantity 2 x plus 5 over x minus 9
4. quantity 13 x plus 5 over 5 x minus 9

Answers

Answer:

  • (2x + 5)/(x - 9)
  • 3. quantity 2 x plus 5 over x minus 9

Step-by-step explanation:

Quantity 2 x squared plus 13 x plus 20 all over x squared minus 5 x minus 36

  • (2x² + 13x + 20)/(x² -5x - 36) =
  • (2x²+ 5x + 8x + 20)/(x² - 9x + 4x -36)=
  • (2x + 5)(x + 4)/(x - 9)(x + 4) =
  • (2x + 5)/(x - 9)

Correct option is option 3
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