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harkovskaia [24]
2 years ago
15

Ms. Warren had each student take 3 pencils and create a triangle with them. Roberto has 3 pencils that measure 12 cm, 5 cm, and

7 cm. How many triangles can Roberto create with his 3 pencils?
A.infinitely many
B.two
C.one
D.none
Mathematics
2 answers:
cestrela7 [59]2 years ago
7 0

Answer:

One.

Step-by-step explanation:

The reason why is because 12-5 = 7, meaning that your lowest length has to be 7. meaning, that you can only do one triangle.

xz_007 [3.2K]2 years ago
4 0

Answer:

D. None.

Step-by-step explanation:

<em>The Triangle Inequality Theorem states the longest side must be shorter than the sum of the other 2 sides. The longest side ( 12 ) >= ( 7 plus  5 ) = 12  is too large.</em>

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Answer:

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Step-by-step explanation:

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the numbers of girls in the choir is 4 times the number of boys in the choir .the total number of students is 60..how many girls
Inessa05 [86]
First, make up some variables to represent the number of Girls and Boys in the choir.  

B = number of boys
G = number of girls

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\frac{B}{G} =  \frac{1}{4}

If you cross-multiply, then you get the simplified equation:
G = 4B

Intuitively this makes sense since if you multiplied the number of boys in the class by 4, that would be equal to the number of girls you have.

Now, we know that the total class size is 60. So girls plus boys equals 60:
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To solve the equation, replace the G in this equation with the replacement you found before, 4B.
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