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3 years ago

Will give Brainly to the best answer!!!!! Please help!!!!

Mathematics

2 answers:

Rom4ik [11]3 years ago

8 0

Answer:

X= -1

Step-by-step explanation:

how u can see I apply the formula, and I have two answers X1= -1 and X2= -1

U only need to see the information that they give u, it was x^2+2x+1=0

and we know that

a= 1

b=2

c=1

then you replace in the formula and do the exercise:)

Ipatiy [6.2K]3 years ago

4 0

Answer:

x=-1

Step-by-step explanation:

here is an example for my class, these really helped

A quadratic equation is any second-degree polynomial equation — that’s when the highest power of x, or whatever other variable is used, is 2. The solution or solutions of a quadratic equation,

Solve the equation,

with the quadratic formula:

Bring all terms to one side of the equation, leaviign

Plug the coefficients into the formula.

In this example, a equals 2, b is –5, and c is –12, so

You can also use the quadratic formula for factoring trinomials.

Here’s what you do.

Use the quadratic formula to get solutions for x. (You can also use your calculator to get the solutions.) Make sure the solutions are written as fractions rather than as decimals and that they’re reduced to lowest terms.

Take the two solutions and put them in factors. If a solution is positive, use subtraction. If a solution is negative, use addition.

If either solution is a fraction, take the denominator and bring it in front of the x.

And, voilà, the trinomial is factored:

(x – 4)(2x + 3)

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What is the volume of the cone?

jok3333 [9.3K]

Volume of cone = 1/3 πr²h

Volume = 1/3 π (6)² (8) = 96π cm³

Answer: 96π cm³

8 0

3 years ago

Help plz only one question and the ans will come 100 ,100 ,80 of each angle

salantis [7]

z° = 80° (Being corresponding angles)

y° + 80° = 180° (Being linear pair of angles)

=> y° = 180° - 80°

=> y° = 100°

x° = y° (Being interior opposite angles)

=> x° = 100°

6 0

3 years ago

Which of the following is a root of the polynomial shown below?

Mademuasel [1]

Answer:

We conclude that option A is true as x = 1 is the root of the polynomial.

Step-by-step explanation:

Given the polynomial

$f\left(x\right)\:=\:x^2\:+\:2x^2\:-\:x-2$

Let us determine the root of the polynomial shown below.

$\:0=\:x^2\:+\:2x^2\:-\:x-2$

$0=3x^2-x-2$

switch sides

$3x^2-x-2=0$

$3x^2-x-2=\left(3x+2\right)\left(x-1\right)$

so the equation becomes

$\left(3x+2\right)\left(x-1\right)=0$

Using the zero factor principle

$3x+2=0\quad \mathrm{or}\quad \:x-1=0$

solving

$3x+2=0$

$3x=-2$

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

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

and

$x-1=0$

$x=1$

The possible roots of the polynomial will be:

$x=-\frac{2}{3},\:x=1$

Therefore, from the mentioned options, we conclude that option A is true as x = 1 is the root of the polynomial.

3 0

3 years ago

Country A has a growth rate of 2.2% per year. The population is currently 5,667,000, and the land area of Country A is 31,000,00

Akimi4 [234]

Answer:

It will be 290 years until there be one person for every square yard of land.

Step-by-step explanation:

We are looking for when the country's population is equivalent to its area in square yards: 31,000,000,000.

Write an equation for the situation: (Trickiest part)

p(x) = (5,667,000)(1 + 0.022)ˣ <= Can modify compound interest equation

31,000,000,000 = (5,667,000)(1 .022ˣ)

Started rounding off numbers

547.056 = 1 .022ˣ <= $x = \frac{log(ans)}{log(base)}$

Solve using log.

x = 2.738 / 0.00945 <= log(547.056) / log(1.022)

x = 289.7 <= Round up because rate is annual. Before the 290th year, the population is less than the number of square yards.

x = 290

Total amount with annual compound interest equation applied to this problem:

$A = P(1 + r)^{t}$ (Principle is starting investment)

Population = (Starting population)(1 + growth rate)^(time)

7 0

4 years ago

robert has 100 grams of radioactive kind of lawrencium how much will be left after 36 hours if it is half life is 4 hours

Maurinko [17]

The answer would be 0.1953125

4 0

3 years ago