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2 years ago

If the cost of carpeting a floor is $2.50 per square foot how much will it cost

Mathematics

1 answer:

Novosadov [1.4K]2 years ago

3 0

Answer:

How many feet of the floor are you carpeting that is the real question

Step-by-step explanation:

It depends on how many feet you are putting the carpet on.

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Drag numbers to complete the table for missing values of x, x2, and x3.

natka813 [3]

Answer:

Values are:

x x²

10 100

7 0

3 years ago

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Complete the following exercises by applying polynomial identities to complex numbers. Factor x2 + 64. Check your work. Factor 1

Mumz [18]

$x^2+64=x^2-(8i)^2=(x-8i)(x+8i)$

$16x^2+49=(4x)^2-(7i)^2=(4x-7i)(4x+7i)$

$(x+9i)^2=x^2+2x\cdot9i+(9i)^2=x^2+18xi+81i^2=x^2+18xi-81=x^2-81+18xi$

$(x-2i)^2=x^2-2x\cdot2i+(2i)^2=x^2-4xi+4i^2=x^2-4xi-4=x^2-4-4xi$

$(x+(3+5i))^2=x^2+2x(3+5i)+(3+5i)^2\\\\=x^2+6x+10xi+3^2+2\cdot3\cdot5i+(5i)^2\\\\=x^2+6x+10xi+9+30i+25i^2=x^2+6x+10xi+9+30i-25\\\\=x^2+6x+10xi+30i-16=x^2+6x-16+(10x+30)i$

$Used:\\i^2=-1\\\\a^2-b^2=(a-b)(a+b)\\\\(a+b)^2=a^2+2ab+b^2$

4 0

3 years ago

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To factor 9x^2 - 4, you can first rewrite the expression as:

olga2289 [7]

Answer:

C. (3x)^2 - (2)^2

Step-by-step explanation:

Each of the two terms is a perfect square, so the factorization is that of the difference of squares. Rewriting the expression to ...

(3x)^2 - (2)^2

highlights the squares being differenced.

We know the factoring of the difference of squares is ...

a^2 -b^2 = (a -b)(a +b)

so the above-suggested rewrite is useful for identifying 'a' and 'b'.

4 0

3 years ago

A circle has a diameter of 15 cm. Find the circumference. . Use 3.14 for π. Round your answer to the nearest tenth. PLEASE HELP!

8_murik_8 [283]

Answer:

47.1 cm

Step-by-step explanation:

The formula for finding circumference is πd. So, plug in the given values and simplify the expression:

d = 15

π = 3.14

15 × 3.14 = 47.1

The circumference of a circle with a diameter of 15 cm and using 3.14 as a substitute for π will be 47.1 cm.

4 0

3 years ago

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4m² – 3m6 – 5m4 What is the degree of the polynomial?

Papessa [141]

Answer:

Degree of the polymonial is the highest of the degrees of the polynomial's monomials with non-zero coefficients.

Step-by-step explanation:

I think the equation is 4m² – 3 $m^{6}- 5m^{4}$

Therefore, degree of the polynomial is the sum of the powers of the variables,

2 + 6 + 4 = 12

Hope this helps!

3 0

3 years ago