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2 years ago

Please help asap for brainlist

Mathematics

1 answer:

Salsk061 [2.6K]2 years ago

5 0

Answer:

it's (2,-4)

hope it helps

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**15 Points!! What is 2 1/2 x 1 1/2, 5.4 x 2 3/4, and 3.1 x 2/7?

Amiraneli [1.4K]

3.75
14.85
0.89
Those are the answers

6 0

3 years ago

Work out the following giving your answers in their simplest form 2/7 ÷ 3/4

Usimov [2.4K]

Answer:

8/21

Step-by-step explanation:

2/7 ÷ 3/4

2/7 * 4/3

8/21

3 0

3 years ago

Write an explict equation of how a computer at 2500$ depricates at the rate of 14% per year

ahrayia [7]

Answer:

V(t) = 2500(0.86)^t where t = the year.

Step-by-step explanation:

Each year the value will be 100 - 14 = 86% ( - 0.86) of the previous year.

6 0

3 years ago

the figure below shows a circle centre of radius 10 cm the chord PQ=16cm calculate the area of the shaded region

m_a_m_a [10]

Step-by-step explanation:

OPQ originally forms a sector, the formula for sector is

$\frac{x}{360} \pi {r}^{2}$

where x is the degrees of rotation between the two radii.

We know three sides length and is trying to find an angle between the radii so we can use law of cosines which states that

$16 = \sqrt{10 {}^{2} + 10 {}^{2} - 2(100) \times \cos(o) }$

This isn't the standard formula, it's for this problem

$16 = \sqrt{200 - 200 \times \cos(o) }$

$16 = \sqrt{200 - 200 \cos(o) }$

$256 = 200 - 200 \cos(o)$

$56 = - 200 \cos(o)$

$- \frac{7}{25} = \cos(o)$

$\cos {}^{ - 1} ( - \frac{7}{25} ) = \cos {}^{ - 1} ( \cos(o) )$

$106.26 = o$

So we found our angle of rotation, which is 106.26

Now, we do the sector formula.

$\frac{106.26}{360} (100)\pi$

$\frac{10626}{360} \pi$

is the area of sector.

Now let find the area of triangle, we can use Heron formula,

The area of a triangle is

$\sqrt{s(s - a)(s - b)(s - c)}$

where s is the semi-perimeter.

To find s, add all the side lengths up, 10,10,16 and divide it by 2.

Which is

$\frac{36}{2} = 18$

$\sqrt{18(18 - 10)(18 - 10)(18 - 16)}$

$\sqrt{18(8)(8)(2)}$

$\sqrt{(36)(64)}$

$6 \times 8 = 48$

So our area of the triangle is 48. Now, to find the shaded area subtract the main area,( the sector of the circle) by the area of the triangle so we get

$\frac{10626}{360} - 48$

Which is an approximate or

44.73

6 0

2 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