3 years ago

CAN SOMEONE PLEASE HELP PLEASE I WILL DO ANYTHING IF YOU HELP ME PLEASE

Mathematics

1 answer:

Aliun [14]3 years ago

6 0

Answer:

Can you explain more?

Step-by-step explanation:

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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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2 years ago

Are the ratios 25/45 and 15/27 proportional? Explain.

liberstina [14]

Write them out as a fraction then reduce them. If theyre the same then its proportional.

25/45 can be cancelled down to 5/9

15/27 can be cancelled down to 3/9

So no theyre not.

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2 years ago

The average of two numbers is 10.What is the sum of the two numbers?

geniusboy [140]

The sum of the numbers is 20 10+10=20 20/2=10

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2 years ago

Read 2 more answers

Number 6. 1 moreee im stuck helpp

Andreyy89

B. V = (26.6)(4.6)
26.6 = l * w

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