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fomenos
3 years ago
8

Use a two-column proof to prove the Triangle Proportionality Theorem:

Mathematics
1 answer:
photoshop1234 [79]3 years ago
4 0

Answer:

Step-by-step explanation:

From the picture attached,

                 Statements                                        Reasons

1). In ΔABC, DE intersects AB and AC  1). Given

2). DE║BC                                              2). Given

3). ∠ADE ≅ ABC                                    3). Corresponding angles postulate

4). ∠AED ≅ ∠ACB                                 4). Corresponding angles postulate

5). ΔADE ~ ΔABC                                  5). AA similarity postulate

6). \frac{AD}{AB}=\frac{AE}{AC}                                           6). Definition of two similar triangles

Hence proved.  

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-3 (v + 4) = 2v - 37
asambeis [7]

Step-by-step explanation:

-3 (v + 4) = 2v - 37

-3v - 12 = 2v - 37

5v = 25

v = 5

3 0
3 years ago
You were given the polynomial f(x)=3x^3+13x^2+19x+k and you know that f(-2)=0find k
eduard

Answer:

k = 10

Explanation:

The initial polynomial is:

f(x)=3x^3+13x^2+19x+k

If f(-2) = 0, then when we replace x by -2, the result will be 0. It means that we can write the following equation:

\begin{gathered} f(-2)=3(-2)^3+13(-2)^2+19(-2)+k=0 \\ 3(-2)^3+13(-2)^2+19(-2)+k=0 \end{gathered}

Therefore, we can solve for k as follows:

\begin{gathered} 3(-8)+13(4)+19(-2)+k=0 \\ -24+52-38+k=0 \\ -10+k=0 \\ -10+k+10=0+10 \\ k=10 \end{gathered}

So, the value of k is 10

6 0
1 year ago
Sam’s business manufactures 5 times as many widgets as Mary does every hour but Sam needs to stop for a few minutes every hour a
natita [175]
Answer:
A) S=5M-3

Explanation:
6 0
3 years ago
Write as a unit rate: Four notebooks for $2.50
Archy [21]

Answer:

B. $1.60 per notebook

Step-by-step explanation:

Because:

4 notebooks ÷ $2.50 (4 notebooks cost) = $1.60 per notebook

4 0
3 years ago
Read 2 more answers
Mai purchased a prepaid phone card for $20. Long distadnce calls cost 8 cents a minute using this card. Mai used her card only o
Leno4ka [110]

I'm not really good at math but I would like to help.

If each call is $.08, then the card can call last for 250 minutes.

The call lasted 202 minutes. Divide 16.16 by .08.

3 0
3 years ago
Read 2 more answers
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