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naeaamm6981
01.11.2020 •
Mathematics
While working in her garage, Rose wants to measure the length of a piece of string she found on a shelf. She does not have a meter stick with her, but she does have a pole that she knows is one meter (100 centimeters) long. She places the string alongside her one-meter pole as shown below:
[asy]
//Setup
unitsize(1mm);
//Ruler body
pair A, B, C, D;
A = (0,5); B = (0,10); C = (100, 10); D = (100, 5);
filldraw(A--B--C--D--cycle, gray);
label("$0\mathrm{~cm}$", (0,2)); label("$100\mathrm{~cm}$", (100, 2)); label("Pole", (50, 2));
//Object (string)
pair A, B, C, D;
A = (0,11); B = (0,12); C = (22, 12); D = (22, 11);
filldraw(A--B--C--D--cycle, heavyred);
label("String", (11, 14));
[/asy]
What should Rose record as the length of the string?
Solved
Show answers
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Ответ:
- 51
Step-by-step explanation:
Order of operations. What's in the parenthesis is first.
4 + 3 ( 7+4 x 2) - 100
Concentrate on (7 + 4 x 2 ) first.
We multiply first so 4 x 2 = 8 then we add.
(7 + 8) = 15
4 + 3(15) - 100 Again, we multiply first.
4 + 45 - 100 Now we can add and subtract in any order.
49 - 100 = - 51