10.44 is 14.4% of what number?

Answers

Answer 1

Answer: 10.44 / 0.144 = 72.5 :)

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The weights (to the nearest pound) of some boxes to be shipped are found to be:. Weight 65 68 69 70 71 72 90 95 frequency 1 2 5 8 7 3 2 2 Their mean weight is 72.97 pounds. What is the standard deviation of these weights? The standard deviation, to the nearest tenth, is a0.

Answers

A is the weight
B is the frequency
C is weight times frequency
D is mean minus weight
E is D raised to the 2nd power ; variance
F is E times frequency ; total variance

A B C D E F
65 1 65 7.97 63.47 63.47
68 2 136 4.97 24.70 49.40
69 5 345 3.97 15.76 78.80
70 8 560 2.97 8.82 70.57
71 7 497 1.97 3.88 27.17
72 3 216 0.97 0.94 2.82
90 2 180 17.03 290.02 580.04
95 2 190 22.03 485.32 970.64
30 2,189 1,842.91

2,189 / 30 = 72.97 mean
1,842.91 / 30 = 61.43 variance
√61.43 = 7.8377 or 7.84 standard deviation.

PLEASE HELP MEEEE!!!!!!

Answers

24, 20,-1, 4,5, 35,21

Six boxes of crackers cost $18. At this
price, how much do 15 boxes cost?

Answers

Answer:

6x3=18 and 15x3= 45 so 45 is the answer.

Step-by-step explanation:

Answer:

Step-by-step explanation:

18 divided by 6 is 3. and 3 times 15 is 45. And to check it do 45 divided by 15 and you get 3. so 45 is the answer.

Adiya said that the first step to solving the quadratic equation x2 + 6 = 20x by completing the square was to divide 6 by 2, square that value, and add the result to both sides. Is Adiya’s solution method correct? Explain.

Answers

Answer:

No, it is incorrect.

Step-by-step explanation:

The quadratic equation is

$x^2+6 = 20x$ or $x^2-20x+6=0$ . To complete square we take the coefficient of x divided by 2, square that value and add the result to both sides. In the equation given the number to do the process is 20, not 6, then the solution method is incorect.

Answer:

NO it is not correct

Step-by-step explanation:

Adiya’s method is not correct. To form a perfect square trinomial, the constant must be isolated on one side of the equation. Also, the coefficient of the term with an exponent of 1 on the variable is used to find the constant in the perfect square trinomial. Adiya should first get the 20x term on the same side of the equation as x2. Then she would divide 20 by 2, square it, and add 100 to both sides.

How do you solve the system by substitution 6x+2y=-26
x-6y=21

Answers

$\begin{cases} 6x+2y=-26 \ \ / *3 \n x-6y=21 \end{cases}\n \n\begin{cases} 18x+6y=-78 \n x-6y=21 \end{cases}\n \n+ \---------\n19x= -57 \ \ /:19\n \nx=-(57)/(19)\n \nx=-3$

$x-6y=21\n \n -3-6y=21 \ \ | 3\n \n -3+3-6y=21+3\n \n-6y=24 \ \ /:(-6)\n \ny=-(24)/(6) \n \n y=-4\n \n\begin{cases} x=-3 \n y=-4 \end{cases}$

Numerical expression the sum of four and nine times three

Answers

The sum of 4 and 9 times 3 would be determined by adding 4 and 9 first, which is 13 then, you would multiply that with 3. And, 13 x 3 is 39. So, my final answer is 39.

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What is the value of a for the equation below?15 + 2a = 35a = 10a = 5a = 20a = 25