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Gelneren [198K]
3 years ago
6

"Researchers have found a strong connection between the amount of money a person spends on bookshelves and that person's level o

f literacy. Therefore, they recommend buying more bookshelves to increase literacy." Why is the researchers' conclusion likely incorrect? A. The amount of money a person spends on bookshelves is correlated with literacy level. B. Reading books, not buying bookshelves, results in better literacy. C. Buying bookshelves, not reading books, results in better literacy. D. The number of books a person reads is correlated with literacy level.
Mathematics
2 answers:
ladessa [460]3 years ago
7 0
B, because anyone can buy a bookshelf, but only literate people can read.
den301095 [7]3 years ago
3 0
I think the answer to this one is B.
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Given: ABCD trapezoid<br> BC=1.2m, AD=1.8m<br> AB=1.5m, CD=1.2m<br> AB∩CD=K<br> Find: BK and CK
stepladder [879]

Answer:

The value of BK is 3m and the value of CK is 2.4m.

Step-by-step explanation:

Given information: ABCD trapezoid

, BC=1.2m, AD=1.8m

, AB=1.5m, CD=1.2m

, AB∩CD=K.

Using the given information draw a figure.

Two sides of a trapezoid are parallel.

Since AB∩CD=K, therefore AB and CD are not parallel, because parallel line never intersect.

AD\parallelBC

\angle KBC=\angle KAD              (Corresponding angles)

\angle KCB=\angle KDA             (Corresponding angles)

By AA rule of similarity

\triangle KBC\sim \triangle KAD

Corresponding sides of similar triangles are proportional.

\frac{KB}{KA}=\frac{KC}{KD}=\frac{BC}{AD}

\frac{x}{x+1.5}=\frac{y}{y+1.2}=\frac{1.2}{1.8}

\frac{x}{x+1.5}=\frac{1.2}{1.8}

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\frac{y}{y+1.2}=\frac{1.2}{1.8}

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