2 years ago

) (60 minutes

Mathematics

1 answer:

Natalija [7]2 years ago

7 0

Answer:

The correct answer is A

Step-by-step explanation:

plz brainlyest (:

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Complete the square to transform the quadratic equation into the form

faltersainse [42]

The square of a binomial is written like

$(x\pm a)^2 = x^2\pm 2ax + a^2$

In your case, you have $2ax=-8x$ , which implies $a=-4$

So, we want to write

$(x-4)^2 = x^2-8x+16$

But our left hand side is

$x^2-8x-10$

If we add 26 to both sides, we have

$x^2 - 8x - 10 +26 = 18+26 \iff x^2-8x+16=44 \iff (x-4)^2=44$

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The correct answer is B. cm3

This is saying "centimeters cubed", and is true because you are multiplying 3 dimensions of centimeters, width*length*height, to get the answer. Thus, you are multiplying the numbers and the units. 30*30*25 and cm*cm*cm

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3 years ago

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3 years ago

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jeka57 [31]

Answer:

Answer: D

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• first factorise out 10:

$= 10(5 {x}^{2} + 3x + 1)$

• then find factors of the quadratic equation in the bracket:

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3 years ago