Simplify the following expression: (2x2+3x−4)−(4x2−7x+1)

HELP

Gre4nikov [31]

Answer:

8/9 x 5

5 x 1/9 x 8

5 x 8 divided by 9

Step-by-step explanation:

5/9 = 0.5555*8 =4.444

8/9 = 0.8888*5 =4.444

5*1/9 = 0.5555*8 =4.444

5*8 = 40/9 =4.444

3 0

3 years ago

A solid metallic sphere of radius 7 cm is cut into two halves. Find the total surface area of the two hemisphere

svetoff [14.1K]

Here,
A sphere has 7cm radius
And it’s cut into tow half (2 hemispheres)
So, the radius of a hemisphere is also 7cm
Now,
TSA of hemisphere = 3 pie r^2
=3*22/7*7^2
=3*22/7*49
=3234/7
=462cm^2
Lastly,
The TSA of 2 hemispheres = 2* 462
=924cm^2

Hence,
The total surface area of the 2 hemisphere is 924cm^2

7 0

3 years ago

Fill in the table using this function rule. y= -6x+1

Eddi Din [679]

Take a picture of the table

6 0

3 years ago

Solve the question 2w^2-8w-1=(w-2)^2

Shkiper50 [21]

Answer:

w= 7/4 +1/4 √89 OR w= 7/4 -1/4 √89

Step-by-step explanation:

2w^2-8w-1= (w-2)^2

Multiply (w-2)^2 by (-1)

2w^2-8w-1= -w+2^2

Add w to both sides

2w^2-7w-1= 4

Add 1 to both sides therefore that -1 cancels

2w^2-7w=5

Get the equation equal to 0 by subtracting 5 from both sides

2w^2-7w-5=0

Use the quadratic formula to solve

x= -(-7) plus or minus √(-7)-4(2)(-5)/2(2)

7 plus or minus √89/4

5 0

3 years ago

A started some business with RS 26,000. After 3 month B joined him with Rs. 16,000. After some more time C joined them with Rs.

viktelen [127]

Answer:

$3$ $months$

Step-by-step explanation:

We know that the total investment period is 1 year, then since A started, A invested Rs 26,000.

Now, since A has been working for 12 months, this is where the effective investment comes in:

A effective investment = Rs 312,000

Then after 3 months, B joined, so:

12 months - 3 months = 9 months in work

B overall invested = Rs 16,000

Since B only worked nine months, we use that to find effective investment:

B effective investment = Rs 144,000

C joined x months since B joined in:

We don't know how much C worked for, but we know that C joined after B:

C investment period = 9 months - x certain amount of months

We know that C's investment is Rs 25,000

Find effective investment:

Rs 25,000 * ( 9 - x ) = Rs 225,000 - 25,000x then to find the total investment:

Add all effective investment:

Rs 312,000 + Rs 144,000 + Rs 225,000 - 25,000x

= Rs 681000 - 25,000x

We now know that C's investment is 225,000 - 25,000x

Find profit share: 225,000 - 25,000x

==> Rs 3,825

The total profit:

Rs 15,453

To get our final answer, we must do this operation:

C investment divided by Total Investment = C's profit and total profit:

( Rs 225,000 - 25,000x) ÷ ( Rs 681,000 - 25,000x ) = Rs 3,825 / Rs 15,453

25 ( Rs 9,000 - 1,000x)/(Rs 681,000 - 25,000x) = (153 * 25) /(153 * 101)

( Rs 9,000 - 1,000x ) ÷ ( Rs 681,000 - 25,000x ) = 1 / 101

Rs 909,000 - 101,000x = Rs 681,000 - 25,000x

Rs 228,000 = 76,000x

Rs 228 = 76x

x = 3

8 0

4 years ago