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2 years ago

I need help with this please!!!

Mathematics

1 answer:

Natasha_Volkova [10]2 years ago

7 0

Answer:

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eve7dne

eveui2w

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Give the coordinates of the point located halfway between (2,1) and (2,4).

nordsb [41]

((X1+x2)/2,(y1+y2)/2) ---> ((2+2)/2,(1+4)/2) ---> (2,2.5)

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2 years ago

5b^2(9b-7)+(-9b^2)(4b-3) in simplest form

Lady bird [3.3K]

The answer is 9b^3−8b^2. Good luck!!!!

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2 years ago

43. (09.01)

AlekseyPX

Answer:

That is;

{25,45,65}

Step-by-step explanation:

Here, we want to find the set of A n B

That is the set that contains values that are present in both sets A and B

Mathematically, that will be;

{25,45,65}

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2 years ago

A newspaper writer will write an article about the mean age of voters. She will estimate by selecting a sample of voters and cal

KengaRu [80]

The answer is B.

The mean is the average so, in this case, the average age of the voters. To get the average the person must take 100 random people who voted, as taking any others will not give them the average age.

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2 years ago

Read 2 more answers

If the equation; (3x)² + {27 × (3)^1/k - 15}x + 4 = 0 has equal roots find k

Dima020 [189]

Step-by-step explanation:

$\green{\large\underline{\sf{Solution-}}}$

Given quadratic equation is

$\rm :\longmapsto\:\rm \: {(3x)}^{2} + \bigg(27 \times {\bigg[3\bigg]}^{ \dfrac{1}{k} } - 15 \bigg)x + 4 = 0$

can be rewritten as

$\rm :\longmapsto\:\rm \: {9x}^{2} + \bigg(27 \times {\bigg[3\bigg]}^{ \dfrac{1}{k} } - 15 \bigg)x + 4 = 0$

Concept Used :- 

Nature of roots :-

Let us consider a quadratic equation ax² + bx + c = 0, then nature of roots of quadratic equation depends upon Discriminant (D) of the quadratic equation.

If Discriminant, D > 0, then roots of the equation are real and unequal.

If Discriminant, D = 0, then roots of the equation are real and equal.

If Discriminant, D < 0, then roots of the equation are unreal or complex or imaginary.

Where,

Discriminant, D = b² - 4ac

Let's Solve this problem now!!!

On comparing with quadratic equation ax² + bx + c = 0, we get

$\red{\rm :\longmapsto\:a = 9}$