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2 years ago

How to solve 2x(x+3)=2x^2+15

Mathematics

2 answers:

STALIN [3.7K]2 years ago

6 0

Step-by-step explanation:

2x^2 + 6x = 2x^2 + 15

2x^2-2x^2+6x=15

6x = 15

x= 5/2 when simplified

Travka [436]2 years ago

5 0

Answer: x = 5/2 = 2.5

Step-by-step explanation:

Given expression

2x (x + 3) = 2x² + 15

Expand parentheses and apply the distributive property

2x · x + 2x · 3 = 2x² + 15

2x² + 6x = 2x² + 15

Subtract 2x² on both sides

2x² + 6x - 2x² = 2x² + 15 - 2x²

6x = 15

Divide 6 on both sides

6x / 6 = 15 / 6

x = 15/6

$\boxed{x=\frac{5}{2} }$

Hope this helps!! :)

Please let me know if you have any questions

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Umnica [9.8K]

Answer:

It would roll in this direction.

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Step-by-step explanation:

It would roll to the direction of maximum decrease, which is the -1 times the direction of maximum increase, which is given by the gradient of the function.

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2 years ago

Find the mean of following data: i)70,30,45,90,45

mars1129 [50]

Answer:

Step-by-step explanation:

The mean is the average number of a data set.

To find the mean:

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Next, divide the sum (280) by 5 (amount of values):

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2 years ago

the table shows the balance of a money market account over time. write a function that represents the balancr y (in dollars) aft

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Answer:

y = 1500 * 1.09^t

Step-by-step explanation:

It should be clear that the rate of change is non-linear, meaning that we can express the function in the following manner

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2 years ago

A helicopter is hovering 450 feet above the ground. The angle of elevation

SIZIF [17.4K]

Answer:

The distance of helicopter from the injured person is 542.82 feet

Step-by-step explanation:

Given as :

The height of the hovering helicopter above the ground = h = 450 feet

The angle of elevation from injured person to helicopter = Ф = 56°

Or, Let the distance of of helicopter from person = x feet

Now, From Triangle

∵ Sin Ф = $\dfrac{\textrm Perendicular}{\textrm Hypotenuse}$

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2 years ago

(3a2 + 2ab + 2b) + (5a2 − 3ab + 9)

ivann1987 [24]

Step-by-step explanation:

$\tt{(3 {a}^{2} + 2ab + 2b) + (5 {a}^{2} - 3ab + 9})$

~While adding , the sign of each term of second expression remains same. So, Remove the unnecessary parentheses :

⤑ $\tt{3 {a}^{2} + 2ab + 2b + 5 {a}^{2} - 3ab + 9}$

~Like terms are those which have the same base. Combine the like terms :

⤑ $\tt{3 {a}^{2} + 5 {a}^{2} + 2ab - 3ab + 2b + 9}$

⤑ $\sf{8 {a}^{2} - ab + 2b + 9}$

$\red{ \boxed{ \boxed{ \tt{ ⟿ Our \: final \: answer : 8 {a}^{2} - ab + 2b + 9}}}}$

Hope I helped ! ツ

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6 0

3 years ago

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