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3 years ago

(2x+2)(2x+2)-10=90 Please help me with the homework, I give ten points to the best answer

Mathematics

2 answers:

Elina [12.6K]3 years ago

5 0

Answer (it has two solutions):

x = 4
x = -6

I hope this helps!

Sedaia [141]3 years ago

4 0

Answer:

2 real solutions.

Step-by-step explanation:

Is this what you expect.

Please mark as brainliest.

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Solve this equation. Leave the answer as an improper fraction. 3x^2 + 2 = 11 - x^2

Nikolay [14]

Answer:

$x = \frac{3}{2}orx=-\frac{3}{2}$

Step-by-step explanation:

The given Equation is

$3x^{2} + 2 = 11-x^{2}$ .................(i)

Adding ( $x^{2} -11$ ) on both sides of (i)

$3x^{2}+2+x^{2}-11 = 11-x^{2}+x^{2}-11$

solving and cancelling out the terms will give

⇒ $4x^{2} -9=0$

⇒ $(2x)^{2} -(3)^{2} = 0$ ...................(ii)

Now we Know that

$(a)^{2} -(b)^{2} = (a-b)(a+b)$

Applying this on equation (ii)

$(2x-3)(2x+3)=0$

This will lead us to

Either 2x-3 =0 .......(iii) or 2x+3=0 ..........(iv)

Solving equation (iii) for value of x

2x - 3 =0

adding 3 on both sides

2x -3 +3 = 0+ 3

2x = 3

Cross multiplying gives

$x=\frac{3}{2}$

Solving equation (iv) for value of x

2x + 3 =0

adding -3 on both sides

2x -3 +3 = 0- 3

2x = -3

Cross multiplying gives

$x=\frac{-3}{2}$

so $x=\frac{3}{2}$ and $x=\frac{-3}{2}$

7 0

3 years ago

The fare for a journey of 40km is Rs25 . How much can be travelled for Rs40

exis [7]

Answer:

just add 15 which is 20 :)))))

Step-by-step explanation:

8 0

3 years ago

F(x) = 100+ 3x g(x) = 8x How do I combine the functions

goblinko [34]

Answer:

Step-by-step explanation:

y=100+3x;gx=8x

Hope it helps

Mark me as brainiest

6 0

3 years ago

A student downloaded a new game on her phone that was recommended by her friend. She wanted to show her friend how good

anygoal [31]

Answer:

a. 587

b. 543

Step-by-step explanation:

a. Mean = sum / number of numbers

To find the sum, we can add the numbers up.

432 + 543 + 348 + 788 + 823 = 2934

There are 5 numbers. Our mean is thus

2934/5 = 586.8, or 587 when rounding up. We round up because we have a .8 at the end, and 8 ≥ 5

b. To find the median, we first must order the numbers. The numbers ordered are this:

348 , 432 , 543 , 788 , 823

To find the median, we can cross off one number on each side until we are left with one or two numbers.

348 , 432 , 543 , 788 , 823

cross out one number from each endpoint

432 , 543 , 788

cross out one number from each endpoint

543

7 0

2 years ago

Help Me please11111111

Y_Kistochka [10]

Answer:

The first option im pretty sure

Step-by-step explanation:

6 0

2 years ago