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3 years ago

The book fair had a sale where 6 books were $43.50. If you wanted to buy 2 books, how much money would you need

Mathematics

2 answers:

Masteriza [31]3 years ago

8 0

$14.50 your welcome girl

Minchanka [31]3 years ago

4 0

Answer:

$14.50

Step-by-step explanation:

you take $43.50 ( the total of all books) divide by 6 ( number of books) and you get $7.25 for each book. then you multiply by 2 because that's the ampunt of bookd the person wants. PLEASE MAKE ME BRAINLEIST ANSWER.

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Answer:

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Step-by-step explanation:

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3 years ago

The circumference of a circle is 251.2 millimeters. What is the circle's diameter? Use 3.14 for it.

Bas_tet [7]

Answer:

Step-by-step explanation:

divide the circumference (251.2) by pi (3.14) and get 80

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3 years ago

Write the equation for a 3rd degree polynomial function that has roots at x = 1–3i and x = 2. The y‑intercept is (0,10). Write a

HACTEHA [7]

Answer:

$\displaystyle P(x)=-\frac{1}{2}(x^2+2x+10)(x-2)$

Step-by-step explanation:

<u>Factored Form Of Polynomials </u>

If we know the roots of a polynomial as

$\alpha _1,\alpha _2,\alpha _3$

the polynomial can be expressed in factored form as

$a(x-\alpha _1)(x-\alpha _2)(x-\alpha _3)$

We are given two of the three roots of the polynomial:

$\alpha _1=1-3i$

$\alpha _2=2$

The other root must be the conjugate of the complex root:

$\alpha _3=1+3i$

Recall the product of two complex conjugate numbers is

$(1-3i)(1+3i)=1^2-(3i)^2=1+9=10$

The required polynomial is

$P(x)=a\left[ x-(1-3i)\right ]\left[ x-(1+3i)\right ](x-2)$

$P(x)=a(x^2+2x+10)(x-2)$

This is the factored form of the polynomial where only real numbers appear

We need to find the value of a, such as

$P(0)=10$

$P(0)=a(0^2+2(0)+10)(0-2)=10$

$-20a=10$

Thus the value of a is

$\displaystyle a=-\frac{1}{2}$

The expression of the required polynomial is

$\boxed{P(x)=-\frac{1}{2}(x^2+2x+10)(x-2)}$

5 0

3 years ago

In the diagram below B is the midpoint of AC if AB equals 2X and BC equals X squared -24 find the value of X and the length of A

Nadya [2.5K]

Answer:

B is the midpoint, so AB = BC; solve for x, which is 4. Then substitute 4 into 3x+2 (which is DE) and get 14.

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

Triangle ABC is shown below:

natka813 [3]

Answer:

O ( 3 - 7 )

Step-by-step explanation:

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4 0

2 years ago