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4 years ago

For which of the following would similar triangles and trigonometry be useful for measuring?

1 answer:

5 0

The length of a table, the width of a classroom, and the length of a car can be easily measured without using trigonometry (could probably use a meter stick or measuring tape) because we can easily reach both ends the width of a wide river is a little different, it may not be practical to measure the distance across directly.

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Which number line below correctly represents the expression -3 + 4?

Archy [21]

Answer:

1st answer

Step-by-step explanation:

First you subrtract 3 from 0 then add 4 to -3

8 0

4 years ago

Patti said hey we all watched the video for the same amount of time is patti correct and use word to explain

Ipatiy [6.2K]

Yes because if you all watched the video at the same time so then you would watch it for the same amount

4 0

3 years ago

Factor this trinomial completely.

WITCHER [35]

Answer:

Option C. (2x+3)(6x – 5) is the correct answer.

Step-by-step explanation:

Given polynomial(trinomial) is:

$12x^2 + 8x - 15$

The given trinomial is quadratic. Factorization will be as follows:

Multiplying the co-efficient of x^2 and the constant results in 180. We have to make factors of 180 in such a way that their sum of difference is equal to the co-efficient of x.

The required factors are 18 and 10

So,

$=12x^2+18x-10x-15\\=6x(2x+3)-5(2x+3)\\= (6x-5)(2x+3)$

Hence,

Option C. (2x+3)(6x – 5) is the correct answer.

8 0

3 years ago

A circle with conference 6 has an arc with a 20 degree central angle

kolezko [41]

1/3 or 0.3 units

1 20

__ = ___

6 360

This implies that:

1 = 20

____ *6

360

This simplifies to:

1 = __ = 0.3 units

6 0

3 years ago

Find all the points if any where y-4x=12 intersects 2-y=2(x+2)^2

Stells [14]

Answer:

Step-by-step explanation:

given the 2 equations

y - 4x = 12 → (1)

2 - y = 2(x + 2)² → (2)

rearrange (1) expressing y in terms of x

y = 12 + 4x

Simplify (2) by expanding factor and substituting y = 12 + 4x

2 - (12 + 4x) = 2(x² + 4x + 4)

2 - 12 - 4x = 2x² + 8x + 8

- 10 - 4x = 2x² + 8x + 8 ← rearrange into standard form

add 10 + 4x to both sides

2x² + 12x + 18 = 0 ← in standard form

divide through by 2

x² + 6x + 9 = 0

(x + 3)(x + 3) = 0 ⇒ (x + 3)² = 0 ⇒ x = - 3

Point of intersection = (- 3, 0 ) → B

4 0

3 years ago