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3 years ago

What is the median of Variable A? Express answer to one decimal place.

1 answer:

3 0

The median of variable A is the middle value when the all the values for variable A is arranged from smallest to greatest.
The values for variable A are
1, 2, 4, 4, 5, 6, 7, 9
The middle value is between 4 and 5. The median is between 4 and 5.
(4 + 5) /2 = 4.5

The median is 4.5

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Use completing the square to determine which of the following gives the solutions to 3x2 - 24x + 40 = 28.

jeka94

Answer:

$x=4+2\sqrt{3}$

$x=4-2\sqrt{3}$

Step-by-step explanation:

<u>Completing the square</u>

when $ax^2+bx+c=0$

Given equation:

$3x^2-24x+40=28$

Subtract 40 from both sides:

$\implies 3x^2-24x=-12$

Divide both sides by 3:

$\implies x^2-8x=-4$

Add the square of half the coefficient of $x$ to both sides:

$(\frac{b}{2})^2=(\frac{-8}{2})^2=16$

$\implies x^2-8x+16=-4+16$

Factor the left side and simplify the right side:

$\implies (x-4)^2=12$

Square root both sides:

$\implies x-4=\pm\sqrt{12}$

Add 4 to both sides and simplify the radical:

$\implies x=4\pm\sqrt{4 \cdot 3}$

$\implies x=4\pm\sqrt{4}\sqrt{3}$

$\implies x=4\pm2\sqrt{3}$

5 0

2 years ago

An IT shop sells laptops, tablets and mobile phones.

balu736 [363]

Answer:

a) about 100

b) 600 phones sold total

c) i think it's the phones

Step-by-step explanation:

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3 years ago

Write an equation of the line passing through the points (3,5) and (−2,−15).

levacccp [35]

Answer:

y=4x-7

Step-by-step explanation:

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3 years ago

If s(x) = 2x2 + 3x - 4, and t(x) = x + 4 then s(x) · t(x) =

Nookie1986 [14]

You simply multiply the two and distribute to solve. I am starting with t(x) because I think it is easier.

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krok68 [10]

Answer:

x = 18

Step-by-step explanation:

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3 years ago

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