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Oduvanchick [21]
3 years ago
5

1. Explain why 3(x + 4) = 3(x - 5) has no solution.

Mathematics
1 answer:
alex41 [277]3 years ago
4 0

Answer:

There is no solution because they are not equal

Step-by-step explanation:

3(x + 4) = 3(x - 5) cannot simply happen, as they are not equal.

Hope this helps!

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A square has a side length 9 cm. What is its area? A square has an area of 9 cm2. What is its side length?
Kay [80]

Answer:

Area = 81; Side Length = 3

Step-by-step explanation:

The area of a square is the side lenght squared, and 9² is 81.

The side lengh can be found by taking the square root of the area. √9 = 3

5 0
2 years ago
A random sample of 11 fields of rye has a mean yield of 20.1 bushels per acre and standard deviation of 7.66 bushels per acre. D
Lady bird [3.3K]

Answer:

17.1≤x≤23.1

Step-by-step explanation:

The formula for calculating the confidence interval is expressed as;

CI = x ± z*s/√n

x is the mean yield = 20.1

z is the 80% z-score = 1.282

s is the standard deviation = 7.66

n is the sample size =  11

Substitute

CI = 20.1 ± 1.282*7.66/√11

CI = 20.1 ± 1.282*7.66/3.3166

CI = 20.1 ± 1.282*2.3095

CI =  20.1 ±2.9609

CI = (20.1-2.9609, 20.1+2.9609)

CI = (17.139, 23.0609)

hence the required confidence interval to 1dp is 17.1≤x≤23.1

8 0
3 years ago
What is the x-coordinate of the vertex of the parabola whose equation is y = 3x2 + 9x?
Westkost [7]
The vertex is (-1.5, -6.75). So the x-coordinate is -1.5. Hope this helps and if so please leave a good rating and thanks. I really appreciate it. Have a nice day!
4 0
3 years ago
Read 2 more answers
-5(x+1)+3x=6-(4x-3) solve for x
PilotLPTM [1.2K]

Answer: x = -3

Step-by-step explanation:Step by step solution :

Step  1  :

Pulling out like terms :

1.1     Pull out like factors :

  -x - 3  =   -1 • (x + 3)  

Equation at the end of step  1  :

Step  2  :

Solving a Single Variable Equation :

2.1      Solve  :    -x-3 = 0  

Add  3  to both sides of the equation :  

                     -x = 3  

Multiply both sides of the equation by (-1) :  x = -3  

One solution was found :

                  x = -3

7 0
3 years ago
Perform the indicated operations.<br> 5a/12bc times 18b^2 c^2/15a^3
Alexxx [7]
The answer is bc/2a^2, just simplify the expression

3 0
3 years ago
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