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iragen [17]
1 year ago
15

Given that 212basex + 122basex=1111 basex.Find x​

Mathematics
1 answer:
Lisa [10]1 year ago
8 0

Write out the decimal expansion of each number:

212_x \equiv 2x^2 + x + 2

122_x \equiv  x^2 + 2x + 2

1111_x \equiv x^3 + x^2 + x + 1

Note that x must be greater than 2. Solve for x.

212_x + 122_x = 1111_x \iff (2x^2 + x + 2) + (x^2 + 2x + 2) = x^3 + x^2 + x + 1 \\\\ ~~~~ \implies 3x^2 + 3x + 4 = x^3 + x^2 + x + 1 \\\\ ~~~~ \implies x^3 - 2x^2 - 2x - 3 = 0 \\\\ ~~~~ \implies (x^3 - 3x^2) + (x^2 - 3x) + x - 3 = 0 \\\\ ~~~~ \implies x^2(x-3) + x(x-3) + (x-3) = 0 \\\\ ~~~~ \implies (x-3) (x^2+x+1) = 0 \\\\ ~~~~ \implies \boxed{x=3}

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Adam borrowed $5,600 from the bank. The bank charges 4.2% simple interest each year.
Igoryamba

Answer:

$235.2

Step-by-step explanation:

Given data

Principal=  $5,600

Rate= 4.2%

Time= 1 year

The expression for the simple interest is given as

SI= PRT/100

substitute

SI= 5600*4.2*1/100

SI= 23520/100

SI=$235.2

Hence after 1 year he will pay $235.2

4 0
3 years ago
Kims family spends $62.50 on dinner. they leave an 18% tip. how much is their total bill after tip?
UNO [17]
62.50 * .18 = $11.25

Add tip-

11.25 + 62.50 = 73.75

Total - $73.75

3 0
3 years ago
Find the polynomial function in standard form that has the zeros listed. i and -i
fgiga [73]

The polynomial function in standard form that has the zeros listed. i and -i is  x² +1 = 0.

<h3>What is polynomial function?</h3>

A quadratic, cubic, quartic, and other functions involving only non-negative integer powers of x are examples of polynomial functions.

The values of x that fulfil the formula f(x) = 0 are the zeros of a polynomial. The polynomial's zeros are the x values for which the function's value, f(x), equals zero in this case. The degree of the equation f(x) = 0 determines how many zeros a polynomial has.

Calculation for the polynomial function-

The general two degree/quadratic equation is given by-

ax² + bx + c = 0

Where a ≠ 0

If the two roots of the equation are x1 and x2.

Then the relation between roots and coefficients of the polynomial are -

  • The sum of the roots = (- coefficient of x)/(coefficient of x²)

         x1 + x2 = (-b)/a

  • The multiplication of the roots = constant/coefficient of x²

        x1.x2 = c/a

From the above two relation the general equation can be written as-

x² -(x1 - x2)x + x1.x2 = 0

Lets say x1 = i and x2 = -i

Substitute the values of x1 and x2 in the general equation

x² -(i - i)x + (i).(-i) = 0

x² - i ² = 0

x² + 1 = 0

Therefore, the polynomial function in standard form that has the zeros listed. i and -i is x² + 1 = 0.

To know more about Polynomial Function, here

brainly.com/question/10918240

#SPJ4

7 0
2 years ago
Solve the inequality <br><br><br> what is the solution?
bija089 [108]

Answer:

The solution to the inequality is:

2\ge \frac{g}{-4}\quad :\quad \begin{bmatrix}\mathrm{Solution:}\:&\:g\ge \:-8\:\\ \:\mathrm{Interval\:Notation:}&\:[-8,\:\infty \:)\end{bmatrix}

Please also check the graph of the solution to the inequality.

Step-by-step explanation:

Given the inequality

2\ge \frac{g}{-4}

switch sides

\frac{g}{-4}\le \:2

Multiply both sides by -1 (reverse the inequality)

\frac{g\left(-1\right)}{-4}\ge \:2\left(-1\right)

Simplify

\frac{g}{4}\ge \:-2

Multiply both sides by 4

\frac{4g}{4}\ge \:4\left(-2\right)

Simplify

g\ge \:-8

Therefore, the solution to the inequality is:

2\ge \frac{g}{-4}\quad :\quad \begin{bmatrix}\mathrm{Solution:}\:&\:g\ge \:-8\:\\ \:\mathrm{Interval\:Notation:}&\:[-8,\:\infty \:)\end{bmatrix}

Please also check the graph of the solution to the inequality.

3 0
3 years ago
Complete this table showing the number of shaded triangles in each step and area of each triangle!
djverab [1.8K]

Answer:

Step-by-step explanation:

From the table attached we find,

Number of shaded triangles = 1

Area of each shaded triangle = 256 square inches

Now we can complete the table following the same pattern,

Step number     Number of shaded triangles   Area of the shaded triangles

        0                                   1                                                   256

        1                                    3                                  256 × 3 = 768

        2                                   5                                256 × 5 = 1280

        3                                   7                                  256 × 7 = 1792

             

5 0
3 years ago
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