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Katen [24]
3 years ago
11

The mean of 4.8,1.5,6.3,6.7,8.3 ​

Mathematics
1 answer:
Effectus [21]3 years ago
5 0

Answer:

5.52

Step-by-step explanation:

To calculate the mean of a set, all you have to do is divide the sum of all elements in the set by the number of elements in the set. Therefore, the mean for this set would be (4.8 + 1.5 + 6.3 + 6.7 + 8.3) / 5 = 5.52.

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option A

12m/s

Step-by-step explanation:

Given in the question,

mass of object = 11kg

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Step-by-step explanation:

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3 years ago
Diego is solving the equation x^2-12x = 21
uysha [10]

Answer:

The solutions to the quadratic equations will be:

x=\sqrt{57}+6,\:x=-\sqrt{57}+6

Step-by-step explanation:

Given the expression

x^2-12x\:=\:21

Let us solve the equation by completing the square

x^2-12x\:=\:21

Add (-6)² to both sides

x^2-12x+\left(-6\right)^2=21+\left(-6\right)^2

simplify

x^2-12x+\left(-6\right)^2=57

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i.e.

x^2-12x+\left(-6\right)^2=\left(x-6\right)^2

so the expression becomes

\left(x-6\right)^2=57

\mathrm{For\:}f^2\left(x\right)=a\mathrm{\:the\:solutions\:are\:}f\left(x\right)=\sqrt{a},\:-\sqrt{a}

solve

x-6=\sqrt{57}

add 6 to both sides

x-6+6=\sqrt{57}+6

Simplify

x=\sqrt{57}+6

also solving

x-6=-\sqrt{57}

add 6 to both sides

x-6+6=-\sqrt{57}+6

Simplify

x=-\sqrt{57}+6

Therefore, the solutions to the quadratic equation will be:

x=\sqrt{57}+6,\:x=-\sqrt{57}+6

5 0
3 years ago
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