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NemiM [27]
3 years ago
8

You paint of a wall in hour. At that rate, how long will it take you to paint one wall?

Mathematics
1 answer:
zysi [14]3 years ago
6 0

Answer:

an hour....

Step-by-step explanation:

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Please help!!!!! It's urgent
Evgesh-ka [11]
       2b                     2a
----------------- +  -----------------
   (b+a)^2            (b^2 - a^2)

            2b                     2a
= ----------------- +  -------------------
      (b+a)(b+a)         (b+a)(b-a)

         2b(b - a) +  2a(b + a)
= ------------------------------------
           (b+a)(b+a)(b-a)


         2b^2 - 2ab  +  2ab + 2a^2
= ---------------------------------------
           (b+a)(b+a)(b-a)

         2b^2 + 2a^2
= ------------------------
        (b+a)(b+a)(b-a)

         2(b^2 + a^2)
= ------------------------
        (b+a)^2 (b-a)

Answer:

Numerator:        2(b^2 + a^2)
Denominator:    (b+a)^2 (b-a)
7 0
3 years ago
There are 850 employees at a software company. The company’s CEO was interested in finding out if his employees prefer the new c
Fiesta28 [93]

Answer:

Hence the best estimate is population with correct option is 74% and

the value for x=148

Step-by-step explanation:

Given:

A sample of 200

Of which 148 prefer brand new coffee

To Find:

Which statement  is true?

Solution:

n=200

x=148

remaining 52 prefer old ones .

So  estimate population proportion,

p=x/n

p=148/200

p=0.74

p=74 %

Now, when x=52

p=x/n,

p=52/200

p=0.26

p=26%

There is no option for 52 and 24 %

Hence x=148 and p=74%.

8 0
3 years ago
Read 2 more answers
Please can someone show me how to work this out step by step without a calculator
Artyom0805 [142]
2\sqrt8\times8\sqrt2=(2\times8)\sqrt{8\times2}=16\sqrt{16}=16\times4=64

Alternatively, you can write radicals as rational exponents, so that you get

2\sqrt8\times8\sqrt2=2\tiems8^{1/2}\times8\times2^{1/2}=2^{3/2}8^{3/2}

Then recalling that 2^3=8, you have

2^{3/2}8^{3/2}=2^{3/2}(2^3)^{3/2}=2^{3/2}2^{9/2}=2^{12/2}=2^6=64
5 0
3 years ago
If 4 sandwich rolls cost $0.64,how much will 21 rolls cost ?
Monica [59]

Answer:

$13.44

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Simplify 2x-{3x-[x-(2x-1)]}
vlada-n [284]

Answer:

Step-by-step explanation:

Working from the inside out, we take it one bracket at a time

2x-{3x-[<u>x-(2x-1</u>)]}

let's tackle the underlined prolem first

x-(2x-1)

= x-2x+1

= -x+1..we can also write this as 1-x if need be

So we now have (2x-(<u>3x-(-x-1)))</u>

Again, we tackle the undelined problem first

3x-(-x-1)

= 3x+x+1

= 4x+1

So we now have 2x-(4x+1)

Now we can tackle this together

= 2x-4x-1

= -2x-1

3 0
3 years ago
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