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Brut [27]
2 years ago
11

1 more than twice as many CDs is 17

Mathematics
1 answer:
Zinaida [17]2 years ago
3 0

Answer:

original number is 8

Step-by-step explanation:

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Yolanda left for a youth retreat at 8:00 p.m. On Friday. She came home on Sunday morning at 10:00 a.m. How long was Yolanda away
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Yolanda was gone for 12 hours 
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3 years ago
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Given: ABCD is a trapezoid, AC ⊥ CD AB = CD, AC=the square root of 75 , AB = 5 Find: AABCD
Ugo [173]

In this attached picture according to the conditions of the problem we have an isosceles trapezoid and since we know that legs are equal (AD=BC=5 cm), we have to calculate bases and height in order to find the area. Working with the triangle BCD, we apply Pythagoras theorem and find that CD = \sqrt{75+25} = 10 cm. Since BDC is a right triangle, applying theorem for the area of triangles, we find that \frac{1}{2} * BF =  \frac{1}{2} * 5 * \sqrt{75} and BF= 0.5\sqrt{75}. Since ABCD is an isosceles trapezoid, triangles ADE and BFC are congruent with Angle Side Angle theorem. Then, DE=FC and with the help of Pythagoras theorem, DE=FC=2.5 cm. Then, AB=EF=5 cm and the area of the trapezoid is  A= BF *  \frac{AB+CD}{2} = 0.5  \sqrt{75}  * \frac{5+10}{2} = 18.75 \sqrt{3}   cm^{2}

3 0
3 years ago
Find the volume of a cube<br>with a side length of 10 ft.​
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Step-by-step explanation:

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3 0
3 years ago
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Which of the following is equivalent to (a + b) (a/b)
cestrela7 [59]

Answer:

\frac{a^{2} +  ab }{b}

Step-by-step explanation:

(a + b) * (\frac{a}{b}) = \frac{a * (a+b)}{b} = \frac{a^{2} +  ab }{b}

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What does the phrase as close as two needles on the same twig
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