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3 years ago

Look at the right triangle ABC:

Mathematics

1 answer:

prisoha [69]3 years ago

8 0

Answer:

The first incorrect justification is in step 2.

Step-by-step explanation:

Step 2. BC2 = AC • DC

2. BC ÷ DC = BC ÷ AC because triangle ABC is similar to triangle BDC

It's supposed to be AC ÷ BC not BC ÷ AC.

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Function or not a function

Shkiper50 [21]

Answer:

Not a function.

Step-by-step explanation:

Functions have graphs or slopes.

This is not a function.

This is not on a graph or on a slope.

Your answer is not a function.

7 0

2 years ago

Which expression is equivalent to 6x^2 + 13x + 5?

hodyreva [135]

The signs of the x-term and the constant term are both positive, so the signs of the constants in the binomial factors must be the same and must both be positive. The only offering that meets that requirement is

... C (2x+1)(3x+5)

_____

If you multiply that out, you get 6x² + 10x + 3x + 5 = 6x² +13x +5, as required.

The sign of the constant term is the product of the signs of the constants in the binomial factors: (+1)·(+5). We want a positive sign for the constant, so both binomial factor constants must have the same sign.

When the signs of the binomial factor constants are the same, the x-term constant will match them. Thus, for a positive x-term constant, both binomial factor constants must be positive.

3 0

2 years ago

Read 2 more answers

What is the next term in the sequence 1/2 1/6 1/18 1/54

ddd [48]

1/162
2*3=6
6*3=18
18*3=54
54*3=162

7 0

2 years ago

What is (-12) + 7 Pre-Algebra

KonstantinChe [14]

The answer to this question is -5

7 0

2 years ago

Read 2 more answers

For `z_1 = 9"cis" (5pi)/(6)` and `z_2 = 3"cis" (pi)/(3)`, find `(z1)/(z2)` in rectangular form.

sammy [17]

Answer:

option D is correct, i.e. 3i

Step-by-step explanation:

Given are the complex number as Z₁ = 9 cis(5π/6) and Z₂ = 3 cis(π/3)

So magnitudes are r₁ = 9, and r₂ = 3

And arguments are ∅₁ = 5π/6, and ∅₂ = π/3

We know the formula for division of complex number is given as follows:-

If Z₁ = r₁ cis(∅₁) and Z₂ = r₂ cis(∅₂)

Then |Z₁ / Z₂| = (r₁/r₂) cis(∅₁ - ∅₂)

|Z₁ / Z₂| = (9/3) cis(5π/6 - π/3)

|Z₁ / Z₂| = 3 cis(5π/6 - 2π/6)

|Z₁ / Z₂| = 3 cis(3π/6)

|Z₁ / Z₂| = 3 cis(π/2)

|Z₁ / Z₂| = 3 cos(π/2) + 3i sin(π/2)

|Z₁ / Z₂| = 3*(0) + 3i*(1)

|Z₁ / Z₂| = 0 + 3i

|Z₁ / Z₂| = 3i

Hence, option D is correct, i.e. 3i

8 0

2 years ago