$\dfrac{1}{3}+\dfrac{3}{5}+\dfrac{2}{3}= \left[ \dfrac{1}{3}+\dfrac{2}{3} \right]+\dfrac{3}{5}\\\\\\=\dfrac{3}{3}+\dfrac{3}{5}\\\\\\=1+\dfrac{3}{5}\\\\\\=\dfrac{5}{5}+\dfrac{3}{5}\\\\\\=\dfrac{8}{5}\\\\\\=1\dfrac{3}{5}$

7 0

2 years ago

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The perimeter of an equilateral triangle is 38 centimeters. Find the length of an

Leokris [45]

Answer:

11.0 cm

P=38 cm

38/3=12.67cm length of one side

Base of triangle = 12.67/2 =6.34 cm

Use formula $a^2+b^2=c^2$

$6.34^2+x^2=12.67^2\\\\=11.0 cm$

x = altitude of triangle

8 0

1 year ago

Of the model cars manufactured in September,1/5 were models of NASCAR cars and 1/3 were world were 2 vintage models.how many car

slava [35]

Add 1/5 and 1/3. 1/3+1/5=
First get common denominator( 15), So 5/15+3/15= 8/15
Then you calculate what is left over which is 7/15

7 0

3 years ago

Is 50 the correct answer

Zolol [24]

yes, 50 is the correct answer

8 0

2 years ago

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