State the order of operations in -2(x-5)^2+8: 1. 2. 3.

2 answers:

4 0

You would use PEMDAS

P stands for parentheses, x-5 can’t be simplified, so on to E.

E stands for exponent so next you would square x-5 getting x^2-10x+25.

M stands for multiplication, you multiply your result from E by -2. So, -2(x^2-10x+25)+8. And then -2x^2+20x-50+8.

D stands for division, and there is none so moving on.

A stands for addition, and so we add next. -2x^2+20x-42.

You can’t simplify any further so there you go!
Hope this helps!

zlopas [31]2 years ago

4 0

Hey there!

Just distribute:
2(x - 5)^2 + 8
= 2x^2 + 20x - 50 + 8
Combine your like terms
-50 & 8
= -50 + 8 ➡️ -42

Answer: 2x^2 + 20x + -42

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|n/2 − 1/3| −1= 1/6

weqwewe [10]

1. n/2-1/3-1=1/6
n/2=1/6+1/3+1
n/2=1/6+2/6+6/6
n/2=9/6=3/2
n=3/2*2=3

check: abs(3/2-1/3)-1=1/6, abs(9/6-2/6)-1= 1/6, 7/6-1=1/6, 1/6 =1/6
3 is a root

2. -(n/2-1/3)-1=1/6
-n/2+1/3-1=1/6
-n/2-2/3=1/6
-n/2=1/6+2/3
-n/2=1/6+4/6
-n/2=5/6
n=-2*5/6=-5/3=-1 2/3
check : abs((-5/3)/2-1/3) -1=1/6
abs(-5/6-1/3) -1 =1/6, abs(-5/6-2/6) -1=1/6, abs (-7/6)-1=1/6, 7/6-1=1/6, 1/6=1/6
so -5/3 or -1 2/3 is also root

so two roots 3 and -5/3(that can be written as -1 2/3)

5 0

3 years ago

A day? 6. If 18 pumps can raise 2150 tonnes of water in 50 days, working 8 hours a day, how much water will be raised in 60 days

Butoxors [25]

Given, 18 pumps----2170 tonnes----10*7 hrs.
So, 16 pumps-------2170 tonnes----10*7*18/16 hrs.
And, 16 pumps-------1736 tonnes----10*7*(18/16)*(1736/2170)hrs. = 63 hrs.

So, no. of days req.= 63/9 = 7 days

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2 years ago

How long does it take to reach 1 million if you keep doubling a number everyday?

Darya [45]

28 days or 672 hours

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3 years ago

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lbvjy [14]

Answer:

280 mangoes

Step-by-step explanation: