12 yd 4 yd 7 yd 7yd 4yd 4 yd 4 yd 4 yd what is the area

Retail price= $120 markup percent= 40% what is the original cost

valina [46]

I believe it would be 72

8 0

3 years ago

The estimate regression equation for a model involving two independent variables and 10 observations follows.

True [87]

Answer:

a) $b_1 = 0.5906\\b_2 = 0.4980$

b) y = 289.815

Step-by-step explanation:

We are given the following information:

The estimate regression equation for a model involving two independent variables and 10 observations follows:

$y = 29.1270 + 0.5906x_1 + 0.4980x_2$

where $x_1, x_2$ are the two independent variable and y is the dependent variable.

a) The regression line is of the form:

$y = b_0 + b_1x_1 + b_2x_2\\\text{where } b_0 \text{ is the y-intercept and }b_1, b_2\text{ are the coefficients of} x_1, x_2\text{ respectively}$

Comparing, we get,

$b_1 = 0.5906\\b_2 = 0.4980$

These are the coefficients of $x_1, x_2$ respectively, and helps us to know the the significance of the independent variable in predicting the independent variable.

b) We have to estimate y when

$x_1 = 180 \text{ and } x_2 = 310\\y = 29.1270 + 0.5906x_1 + 0.4980x_2\\\text{Putting values}\\y = 29.1270 + 0.5906(180) + 0.4980(320)\\y = 289.815$

6 0

4 years ago

The radius of a circle is 13 ft. Find its circumference in terms of \piπ.

Law Incorporation [45]

Answer:

The circumference of the circle is

Formula: 2πr

Radius=13ft

So, 2 x 22/27 x 13 = 81.71ft

Answer: 81.71ft

*Answers may differ a bit in decimals with 3.14 and direct π .

Mark as brainliest

6 0

3 years ago

X² + y² = 34 x + y =8

Nataly [62]

Step-by-step explanation:

${x}^{2} + {y}^{2} = 34 \\ x + y = 8 \\ x = 8 - y \\ substitute \: x \: in \\ {x}^{2} + {y}^{2} = 34 \\ {(8 - 4)}^{2} + {y}^{2} = 34 \\ {(8 - 4) }^{2} = {y}^{2} - 16y + 64 \\ {y}^{2} - 16y + 64 + {y}^{2} = 34 \\ {2y}^{2} - 16y + 64 = 34 \\ {2y}^{2} - 16y + 64 - 34 = 0 \\ {2y}^{2} - 16y + 30 = 0 \\ 2 {y}^{2} - 6y - 10y + 30 = 0 \\ (2 {y}^{2} - 6y) - (10y + 30) = 0 \\ 2y(y - 3) - 10(y - 3) = 0 \\ (2y - 10)(y - 3) \\ 2y = 10 \\ y = \frac{10}{2} \\ y = 5 \\ or \\ y = 3 \\ if \: y = 5 \: \: x = 3 \\ if \: y = 3 \: \: x = 5$

4 0

3 years ago

In triangle XYZ, m∠Z > m∠X + m∠Y. Which must be true about △XYZ?

Alchen [17]

X + Y < 90

X + Y + Z = 180
Z > X + Y so Z > 90

3 0

3 years ago