MATHEMATICS MIDDLE SCHOOL

Could you help me with math? 
2x^2 + 8x = 0
How to solve it?

Answers

Answer 1
Answer: 2x^2 + 8x = 0\n \n2x( x+4)=0 \n \n2x=0 \ \ or \ \ x+4 = 0 \n \n x=0 \ \ or \ \ x = -4 \n \nAnswer : \ x=0 \ \ or \ \ x= -4
Answer 2
Answer: 2x^2 + 8x = 0\n\n2x(x+4)=0\ \ \ \Leftrightarrow\ \ \ (2x=0\ /:2\ \ or\ \ \ x+4=0)\n\n.\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x=0\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x=-4

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Your help is much appreciated. Thank you.

Answers

Answer:

A

Step-by-step explanation:

If I am not wrong, the answer is A. If you take the sides of ΔABC and multiply all of the sides by three you get ΔDEF.

If I can get the brainliest that would help me out a lot thanks.

Find the final price on a $1,049 televisionthat is on sale for 12% off of the sales tax is
4.5%

Answers

Answer:

$883.40

Step-by-step explanation:

Calculate the amount of money needed to pay after the discount.n

$1049 × 88% = $923.12

Calculate the amount of money needed to pay after the tax.

$923.12 × 104.5% = $883.3684210526

=$883.40(rounded off to nearest cents)

hope  this helps

out of 18 people in the glee club, 11 have dogs and 7 have cats. four people have both cats and dogs. how many club members have only cats?

Answers

Ans.\ 3\ people\ have\ only\ cats
3 people because 7 minus the 4 people who have both is 3

I know that the answer to this is all real numbers less than or equal to 5. My question is how do you solve this (without a calculator)? Given f(x) = -3x^2 +5, what is the range of the function I tried to use -b/2a but I probably did it wrong. Thanks

Answers

find inverse function
y = f(x) = -3x^2 + 5
write x in terms if y
x = sqrt(-(y-5)/3)
inverse function is
f-1(x) = sqrt(-(x-5)/3)

domain of inverse is the range of the function

from inverse, inside sqrt must greater than or equal to 0 so that x-5 <= 0 which is x <= 5

What is 20/24 in simplest form?

Answers

We can divide the numerator and denominator by 4.

20 / 4 = 5
24 / 4 = 6

So we have 5/6.
\frac { 20 }{ 24 } \n \n =\frac { 4 }{ 4 } \cdot \frac { 5 }{ 6 } \n \n =1\cdot \frac { 5 }{ 6 } \n \n =\frac { 5 }{ 6 }

Mikasi and Julie are determining which size sports drink is the better buy per ounce: a 16-ounce bottle for $1.95 or a 36 ­ounce bottle for $3.05. Who is correct? Explain.Mikas: 16-oz bottle: 12.2¢ per ounce
36-oz bottle: 8.5¢ per ounce

Julie: 16-oz bottle : 8.2¢ per ounce
36-oz bottle: 11.8¢ per ounce

EXPLAIN!!!!

Answers

Mikas is correct because 12.2 x 16 is 195.2, which estimated is 195, and then 8.5 x 36 is 306, which is close enough to the answer. I hope I helped.:)
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