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3 years ago

11

A rectangle has a length of 7 and a width of w. What is an expression for the perimeter?

1 answer:

Nastasia [14]3 years ago

5 0

(7x2)+(2x w). Times 2 because you need each side and the opposite sides are the same size.

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Explain the role of the GCF in factoring a polynomial.

Ahat [919]

1. GCF is a factor that is shared by all terms within a polynomial for example, if we have a polynomial of the form A*B + A*C, the GCF is A since both terms have A as a factor 2. after we factor out the GCF, it is placed outside the parentheses, in front of the rest of the polynomial. using our previous example, A*B+A*C = A(B+C) 3. we can verify that our factoring is correct by distributing the GCF to the polynomial within the parentheses

5 0

3 years ago

N - 29 - 33 = -49 solve the equation.

Pepsi [2]

Answer:

n=13

Step-by-step explanation:

n-29-33=-49

Always work left to write in these types of equation, so subtract -29-33 to get -62:

n-29-33=-49

n-62=-49

Add 62 to both sides:

n-62=-49

+62 <u>+62</u>

n = 13

6 0

3 years ago

Tan 9x - tan 5x/ 1+ tan 9x tan 5x

NeTakaya

Answer:

tan 4x

Step-by-step explanation:

Note the difference identity for tangent ratio is

tan(x - y) = $\frac{tanx-tany}{1+tanxtany}$

Given

$\frac{tan9x-tan5x}{1+tan9xtan5x}$ ← in the form of the right side of the expansion, thus

= tan(9x - 5x)

= tan 4x

8 0

3 years ago

The mean and standard deviation of the number of practices are = 8 practices and sx = 4.47 practices. The mean and standard devi

ddd [48]

Least square regressions are used to find the equation of <em>best fit between two variables</em>.

The equation of the least-squares regression line is: $\mathbf{y = 9.414 - 0.213x}$

The given parameters are:

$\mathbf{\bar x = 8}$

$\mathbf{\sigma_x = 4.47}$

$\mathbf{\bar y = 7.71}$

$\mathbf{\sigma_y = 1.20}$

$\mathbf{r = -0.793}$

The equation of the least-squares regression line is represented as:

$\mathbf{y = a + bx}$

Where:

$\mathbf{b = r \times \frac{\sigma_y}{\sigma_x}}$

$\mathbf{a = \bar y - b\bar x}$

So, we have:

$\mathbf{b = r \times \frac{\sigma_y}{\sigma_x}}$

$\mathbf{b = -0.793 \times \frac{1.20}{4.47}}$

$\mathbf{b = -0.213}$

$\mathbf{a = \bar y - b\bar x}$

$\mathbf{a = 7.71 - (-0.213) \times 8}$

$\mathbf{a = 9.414}$

So, the equation is:

$\mathbf{y = a + bx}$

$\mathbf{y = 9.414 - 0.213x}$

Read more about equations of least squares regression at:

brainly.com/question/2141008

8 0

2 years ago

Jenna bought four composition notebooks in three pocket folders from the bookstore and paid $9.85. If the cost of a pocket folde

PolarNik [594]

Answer:

9.85 - 1.15 = 8.70

Step-by-step explanation:

you jus subtract :)

7 0

3 years ago

Read 2 more answers