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3 years ago

Select the correct image.

Mathematics

2 answers:

Anvisha [2.4K]3 years ago

6 0

Answer:

The BOTTOM LEFT ICE

Step-by-step explanation:

julia-pushkina [17]3 years ago

5 0

Answer: The ice image, bottom left.

Step-by-step explanation:

The albedo values give information about the proportion of radiation that a given object surfaces, for example, if an object has an albedo value of 0.2, this means that the object reflects 0.2*100% = 20% of the radiation.

You usually can see that darker objects have a smaller albedo value, while clearer objects have a bigger albedo value, meaning that as clearer is the color, usually it reflects a bigger proportion of the radiation.

Here we have that the bigger albedo value is in the ice ( 0.55), so the correct image is the ice image, at the bottom left.

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Write a polynomial expression, in simplified form, that represents the AREA of the blanket and use the expression to evaluate th

pochemuha

Answer:

Polynomial expression that represents the area of blanket:

$A(x)=(6x^2+5x-21)cm^2$

If $x=2$ : $A(2)=13cm^2$

Step-by-step explanation:

The area of the rectangle can be calculated with the formula:

$A=lw$

Being l the lenght of the rectangle and w the width of the rectangle.

In this case, the lenght and the width are represented with:

$l=(3x+7)cm$

$w=(2x-3)cm$

Substitute them into $A=lw$ :

$A(x)=(3x+7)(2x-3)$

Then:

Use Distributive property (Remember the Product of powers property: $b^a*b^c=b^{(a+c)}$ ):

$A(x)=(3x+7)(2x-3)\\A(x)=6x^2-9x+14x-21$

Add like terms:

$A(x)=(6x^2+5x-21)cm^2$ (Simplied form)

Evaluate $x=2$ :

$A(2)=(6(2)^2+5(2)-21)cm^2\\A(2)=(6(4)+10-21)cm^2\\A(2)=(24-11)cm^2\\A(2)=13cm^2$

6 0

4 years ago

Clarence measures the diameter of each tennis ball and a bag with a standard ruler. Unfortunately he uses the ruler and correctl

ollegr [7]

Refer to the figure below.

Assume that there are n correct measurements
$x_{i} , \, i=1,2, \, ... \, n$
Because each measurement has an error of 0.2 in, the actual measurements are
$x_{i} + 2$

From the figure, the analysis indicates that the correct mean is
μ = 3 in = 3*2.54 cm = 7.62 cm
The correct standard deviation is
2.934 in = 2.934*2.54 cm = 7.45 cm

Answer:
μ = 7.62 cm
σ = 7.45 cm

7 0

3 years ago

Ted’s box is 4 inches tall, 3 inches long, and 1inch wide. What is the volume, in cubic inches, of Ted's box?

ryzh [129]

Answer:

12 cubic inches

Step-by-step explanation:

To find the volume of a box you multiple the length * width * height.

3*1*4 = 12

3 0

4 years ago

Read 2 more answers

Solve the system of equations below<br>5x+2y=9<br>2×-3y=15<br>

nirvana33 [79]

Answer:

The solution is (3, -3)

Step-by-step explanation:

5x + 2y = 9

2x - 3y = 15

Use elimination by addition/subtraction. Multiply the first equation by 3 and the second by 2, obtaining:

15x + 6y = 27

4x - 6y = 30

----------------------

19x = 57

This yields x = 3.

Substituting 3 for x into 5x + 2y = 9, we get 5(3) + 2y = 9, or

15 + 2y = 9, or

2y = -6

This yields y = -3.

The solution is (3, -3)

4 0

3 years ago

Evaluate when x = 9, y = 144, and z = 16

Katyanochek1 [597]

Answer: Should be 163

Step-by-step explanation: Substitute the value of the variable into the expression and simplify.

163

5 0

3 years ago