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Helen [10]
3 years ago
11

The science department buys microscopes every 5 years, safety goggles every 4 years, and test tubes every 2 years. They bought a

ll three items this year. In how many years will they have to buy all three items again.
Mathematics
2 answers:
mars1129 [50]3 years ago
7 0
11 because I have to add all the years/number up
tigry1 [53]3 years ago
6 0
In 20 years they will buy all three items again
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I need help I’ll give you points it’s urgent
nlexa [21]

Answer:

Step-by-step explanation:

Area: 28.26

Circumference: 12.56

8 0
4 years ago
I need help with this if you are right I will mark you
Dafna11 [192]
158 this does not need to be twenty charters as it is a multi choice question
8 0
3 years ago
How does 3x = 4(x-2.25) = 9. Wherethe hell is everyone getting a 9?!?! At a bargain store, Tanya bought three items that each co
andrew11 [14]

Answer:


Step-by-step explanation:

Here is how to get 9:

3x = 4(x - 2.25)

Solve 4(x - 2.25)

3x = 4x - 9

Move the variable to the left side and change it's sign

3x - 4x = -9

Combine like terms

-x = -9

change the signs

x = 9

There ya go! I hope this isn't too confusing!


7 0
3 years ago
Emily wants to make a rectangular model with a height of one cube
Thepotemich [5.8K]

Answer:

Three cubes


Step-by-step explanation:


The cubes have to be indistinguishable and all orientations of one cube are also have to be indistinguishable.


All ways of connecting two cubes result in the same shape. So answer is larger than two.


After connecting two cubes, there are ten faces where the third cube can be attached, and two faces which are connected, accounting for all 12 faces of two cubes.


Of the 10 exposed faces, exactly two are on opposite ends, both leading to the same straight line figure. The other 8 faces all lead to an L shape, and all L shapes can be rotated to be identical.


Hence, three cubes can only make a straight shape or an angled shape.


Four cubes can make a straight shape, a L shape, a Γ shape (but flipping it over through 3 dimensions makes L and Γ identical), a T shape, and a square shape. That is either four or five different objects depending on if they can be lifted from the table. Anyway, it is more than two.

4 0
3 years ago
Lanu draws a rectangle that is 10 inches wide and 20 inches long. Which rectangle described down below has the same area
Alenkasestr [34]

Answer:

b. 8 inches wide and 25 inches long

Step-by-step explanation:

Here are the options

5 inches wide and 25 inches long

b. 8 inches wide and 25 inches long

c. 15 inches wide and 15 inches long

d 15 inches wide and 25 inches long

Area of a rectangle = length x width

10 x 20 = 200

first option

5 x 25 = 125 does not have the same area as the one lanu drew

second option

8 x 25 = 200 has  the same area as the one lanu drew

third option

15 x 15 = 225 does not have the same area as the one lanu drew

fourth option

15 x 25 = 375 does not have the same area as the one lanu drew

3 0
3 years ago
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