What's the value of X
Answers
1). Take care of the (x+1)² . . .
(x + 1)² = x² + 2x + 1
2). Take care of the (x-1)² . . .
(x - 1)² = x² - 2x + 1
The problem says that (the first expression) minus (the second expression) is 32 .
(x² + 2x + 1) - (x² - 2x + 1) = 32
Can you handle this ?
Only one more touchy point to take care of . . . removing the second parentheses.
Since there's a negative sign before it, that changes the sign of everything inside:
(x² + 2x + 1) PLUS (- x² + 2x - 1) = 32
Now you can just erase all the parentheses:
x² + 2x + 1 - x² + 2x - 1 = 32
Now I'm just going to write the things on the left side in a different order,
without changing anything:
x² - x² + 2x + 2x + 1 - 1 = 32
Isn't that neat ? ! ?
What you have now is:
4x = 32
Divide each side by 4 :
x = 8
Just watch how slick that works:
(x + 1)² - (x - 1)² = ?
(x + 1) = 9 (x - 1) = 7
(9)² - (7)² = 81 - 49 = . . . . . . . . 32 !
спасибо
Удачи
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(1) 3.8 inches per year
(2) 4.25 inches per year
(3) 4.6 inches per year
(4) 4.75 inches per year
(quick pls)
Answers
Answer:
answer is 3.8 inches per year
107%
7%
0.07%
Algebra 2
Answers
Answer:
Step-by-step explanation:
Analyzing the growth rate of 1.07:
If the growth rate is a number greater than 1, we have exponential growth; if the growth rate is a number greater than 0 but less than 1, we have exponential decay.
Our growth rate is actually growth. But the rate of growth is not 107%. The rate of growth means that we already had 100% of the population and that it is growing by 7% each year. 100% + 7% = 107%; as a decimal, 1.07
So the rate of growth is 7%
Answers
Answer:
x^2+y^2=25
Step-by-step explanation:
For my graphing utility, entering the given equation will generate the required graph. (The parentheses are not needed, but do no harm.)
Answers
Final answer:
To make x the subject of the equation, you can rearrange the equation x = 5t - a.
Explanation:
To make x the subject of the equation, we need to isolate the variable on one side of the equation. Here's how:
- Distribute 5 to both x and t: 6x + a = 5x + 5t
- Subtract 5x from both sides: 6x - 5x + a = 5t
- Combine like terms: x + a = 5t
- Subtract a from both sides: x + a - a = 5t - a
- Cancel out a: x = 5t - a
Therefore, to make x the subject, the equation is x = 5t - a.
Learn more about Rearranging equations here:
#SPJ2
6x+a=5x+5t
a=-x+5t
-x=a-5t
x=5t-a
Answers