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MAXImum [283]
3 years ago
9

a scientist has a mystery element that she wants to identify by using its properties these properties include its freezing point

she collected data about the elements freezing points (horizontal line)and display it on the graph below use the graph above to determine the freezing point of the element (horizontal line) which of these elements is the mystery element the freezing point of each element is listed by its name cobalt (1495) silicon (1430) iron (1539) nickel (1455)

Mathematics
1 answer:
netineya [11]3 years ago
4 0
Yes silicon was made 1495 and its very useful
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Joe spent half of his weekly allowance playing mini-golf. To earn money, his parents let him weed the garden for $6. What is his
frosja888 [35]

Answer: Joe's weekly allowance = $12

Step-by-step explanation:

Joe spent half of his weekly allowance playing mini-golf

Let a = his weekly allowance

This means Joe spent a/2 playing mini-golf.

To earn money, his parents let him weed the garden for $6

This means Joe's total money

= a + 6

What is his weekly allowance if he ended with $12?

This means he had $12 left after spending a/2 from ta total of (a +6)

Therefore,

(a +6) -a/2 = 12

Taking LCM of 2

[2(a+6)-a]/2=12

Cross multiplying by 2

2a + 12-a = 24

a+12 =24

a = 24-12 =$12

Joe's weekly allowance = $12

6 0
3 years ago
Electric utility poles in the form of right cylinders are made out of wood that costs $25.46 per cubic foot. Calculate the cost
kotegsom [21]

Answer:

$ 1349.746624

Step-by-step explanation:

The volume of a cylinder

The formula for calculating the volume of a cylinder is expressed as:

V=πr²h

where:

r is the radius

h is the height

Given the following parameters

r = d/2 = 1.5/2 = 0.75ft

h = 30ft

Get the volume of the cylinder

V=π(0.75)²(30)

V= 53.0144...ft³

If the wod costs $25.46 per cubic foot, hence the cost of the wood will be 53.0144*25.46 = $ 1349.746624

4 0
2 years ago
The length of a rectangular poster is 2 more inches than three times its width. The area of the poster is 33 square inches. Solv
laiz [17]

Answer:

Step-by-step explanation:

Area of the rectangle = 33 inches sq

Area of a rectangle (formula) = l*b

let the width be x

length = 2 inches + 3x = 2+3x

Area of the rectangle = l*b = 2+3x + x

33 inches sq = 2+3x + x

33 in sq = 2+4x

33/2 = 4x

16.5/4 = x

x = 4.125

width= <u>4.125 inches</u>

length = 2+3x = 2+3(4.125) = <u>14.375</u>

<u></u>

(unless your poster is 32 sq inches and you made a mistake, just replace 33 with 32 and solve it)

7 0
2 years ago
Please help me with this if you can? thanks alot :)))​
Lynna [10]

The probabilities are:

  • P(red) = 5/24
  • P(orange) =  0
  • P(blue) =  1/3
  • P(not green)= 17/24
  • P(green or black) = 11/24
  • P(not yellow)  = 1.

<h3>How to find the probabilities?</h3>

The probability of getting a particular color of marble, is given by the quotient between the number of marbles of that color and the total number of marbles.

Here we have:

  • 5 red marbles.
  • 7 green marbles.
  • 4 black marbles.
  • 8 blue marbles.

So the total number is 5 + 7 + 4 + 8 = 24.

Then:

  • P(red) = 5/24
  • P(orange) = 0/24 = 0  (because there are 0 orange marbles).
  • P(blue) = 8/24 = 1/3
  • P(not green) = (24 - 7)/24 = 17/24
  • P(green or black) = (4 + 7)/24 = 11/24
  • P(not yellow) = 24/24 = 1 (because there aren't yellow marbles).

If you want to learn more about probability, you can read:

brainly.com/question/251701

#SPJ1

5 0
2 years ago
If you multiply (2x+1)(x-5) what’s the answer
photoshop1234 [79]

Answer:

2x^2 - 9x - 5

Step-by-step explanation:

(2x+1)(x-5)

Using FOIL

= 2x^2 - 10x + x - 5

= 2x^2 - 9x - 5

5 0
3 years ago
Read 2 more answers
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