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2 years ago

Lisa buys package of 3,000 paper clips.

Mathematics

1 answer:

den301095 [7]2 years ago

6 0

Answer:

300 paper clips in one box

300 multiply to 10 box =3,000 paper clips

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For each table, determine whether it shows that x and y are proportional.

myrzilka [38]

9514 1404 393

Answer:

1. proportional, 6

2. not proportional

Step-by-step explanation:

Table 1

Each y-value is 6 times the corresponding x-value, so the variables are proportional, and y = 6 times x.

Table 2

The ratios of y to x are 2, 4, 8, so are not the same. The values are not proportional.

8 0

2 years ago

What is the surface area of the cone? Express your answer in terms of π.b

weeeeeb [17]

Given:

Radius of the cone = 5 ft

Slant height of the cone = 21 ft

To find:

The surface area of the cone

Solution:

Surface area of cone formula:

$SA=\pi r^{2}+\pi r l$

where r is the radius and l is the slant height.

$SA=\pi \times 5^{2}+\pi \times 5 \times 21$

$SA=\pi \times 25+\pi \times 105$

$SA=25 \pi+ 105 \pi$

$SA=130 \pi$

The surface area of the cone is 130π square feet.

8 0

2 years ago

I need help to these two questions please

Vilka [71]

Answer:

second question i think the answer is c .i don't know about first one

Step-by-step explanation:

4 0

2 years ago

The expression mc031-1.jpggives the thickness in millimeters (mm) of the insulation needed for a high voltage cable. mc031-2.jpg

SVETLANKA909090 [29]

Electric current is the movement of the electrons caused by potential difference. For example, in a circuit, the electrons in the bulb will not move without the potential difference or voltage. When there is voltage, electric current occurs because there is a driving force for the electrons in the wire to move.

4 0

2 years ago

I need help please. I don't understand

Viktor [21]

Answer:

a. y = 0.56x -17.78 . . . . y = Celsius temperature; x = Fahrenheit temperature

b. 37.436 °C

c. interpolation

d. 83.2 °F

Step-by-step explanation:

a. In most cases, finding the linear regression equation that fits a table of data involves somewhat tedious calculations best performed by a calculator or computer. The general approach is to enter the data into the necessary list(s) or table, and invoke the necessary function.

In Microsoft Excel (and many other spreadsheet programs), you can chart the data in the usual way, then choose the option to add the regression equation to the chart.

In the Desmos calculator used here, the data can be entered into a table, and a generic equation written relating the table entries. Any unknown constants in the equation are computed by Desmos so as to maximize the correlation between the equation and the data. Using a linear equation results in a linear regression computation.

This calculator tells us what we should already know (from previous knowledge of Fahrenheit–Celsius conversion).

y ≈ 0.56x -17.78

(We already know the actual conversion is y = (5/9)(x -32) = (5/9)x -(17 7/9). The above is what you get when the numbers are rounded to hundredths, as required by this problem.)

___

b. Using the above equation for x=98.6, we get

y = 0.56·98.6 -17.78 = 55.216 -17.78 = 37.436 . . . °C

___

c. Since we're finding a value between values already in the table, the process is called interpolation. (Extrapolation is used to find values beyond those that are already in the table. The prefixes inter- (between) and extra- (beyond) can help you remember what these terms mean.)

___

d. In this part, we're asked to find x that corresponds to y=28.8. We fill in the value and solve.

28.8 = 0.56x -17.78

46.58 = 0.56x . . . . . . add 17.78

46.58/0.56 = x ≈ 83.179 ≈ 83.2 . . . . . divide by the coefficient of x; round appropriately. Units are °F.

6 0

3 years ago