3 years ago

Complete the missing parts of the paragraph proof.

Mathematics

1 answer:

NARA [144]3 years ago

4 0

I am sick there toooo someone plez helppp

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If a x 10n is scientific notation, then a must be between 1 and ___.

posledela

Answer:

b. 100

Step-by-step explanation:

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3 years ago

Solve the quadratic equation x2+8x−30=0 by completing the square.

diamong [38]

Answer:

$\bold{x=-4\pm\sqrt{46}}$

Step-by-step explanation:

$(a+b)^2=a^2+2ab+b^2\\\\\\x^2+8x-30=0\\\\\underbrace{x^2+2\cdot x\cdot 4+4^2}-4^2-30=0\\\\{}\qquad(x+4)^2\,-\,16-30=0\\\\{}\qquad\ \ (x+4)^2=46\\\\ {}\qquad\ \ x+4=\pm\sqrt{46}\\\\ {}\qquad\ \ x=-4\pm\sqrt{46}$

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3 years ago

I am a 3-digit number. If rounded off to the nearest hundreds. I become 500. If rounded off to the nearest tens, I become 540. I

dimulka [17.4K]

Answer:

535 is the cirrext answer

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3 years ago

Find the percent of increase.<br> Original number: 45 books<br> New number: 63 books

BARSIC [14]

Answer:

Step-by-step explanation:

first you multiply 45 by .40 you multiply by .40 because that is the percent increase.

45*.40=18

then you just add the 18 to 45 which get you 63.

answer:40%

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3 years ago

Estimate the sum of 703 + 620

Natalija [7]

When you estimate, you round each number, the add.
We round them to
700+620, which is 1320
So our non estimated answer is 1323
But our estimated answer is 1320

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3 years ago