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2 years ago

Don’t know. Someone help a person!Ty

Mathematics

1 answer:

docker41 [41]2 years ago

5 0

Answer:

3rd option

Step-by-step explanation:

8x³ - 27y³ ← is a difference of cubes and factors in general as

a³ - b³ = (a - b)(a² + ab + b²)

8x³ - 27y³

= (2x)³ - (3y)³

= (2x - 3y)((2x)² + 2x(3y) + (3y)²) , that is

= (2x - 3y)(4x² + 6xy + 9y²)

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Help Plz!

Len [333]

Answer:

10 for each side so 40 tiles

Step-by-step explanation:

6 0

3 years ago

Robert is lying on the ground, looking at the top of a flagpole. The angle of elevation to the top of the flagpole is

NeTakaya

Answer:

Height of flagpole = 571 ft

Step-by-step explanation:

Given:

Angle of elevation to the top of the flagpole is 55° .

Distance from the eyes to the base of flagpole = 400 ft.

To find the height of the flagpole.

Solution:

We can draw the situation as a right triangle as shown below.

In triangle ABC.

$BC=400\ ft$

∠C= 55°

To find the length AB (height of the flagpole).

Applying trigonometric ratio :

$\tan\theta=\frac{Opposite\ side}{Adjacent\ side}$

$\tan C=\frac{AB}{BC}$

Plugging in values.

$\tan 55\°=\frac{AB}{400}$

Multiplying both sides by 400.

$400\tan 55\°=\frac{AB}{400}\times 400$

$571.26=AB$

∴ $AB\approx 571\ ft$

Height of flagpole = 571 ft

6 0

3 years ago

7729 to one significant figure

love history [14]

Are there any decimals? Round to one digit: 7729 expressed in 1 digit = 8x10^-3

6 0

3 years ago

In how many ways can we select 11 members of cricket players from 17 players

muminat

Answer:

12,376.

Step-by-step explanation:

The order in which they are chosen does not matter so this is a combination NOT a permutation.

That is 17C11

= 17! / (11! 6!)

= (17*16*15*14*13*12) / (6*5*4*3*2*1)

= 12376.

3 0

2 years ago

If A and B are two independent events with P(A)=2÷3 and P(B) =1÷5, find P(AUB).

iren [92.7K]

Answer:

$for \: independent \: events : \\ P(AUB) = P(A) + P(B) \\ P(AUB) = \frac{2}{3} + \frac{1}{5} \\ = \frac{13}{15}$

Step-by-step explanation:

P(AUB) is P(A) + P(B) because P(AnB) is zero.

$P(AUB) = P(A) + P(B) - P(A{ \huge{n} }B) \\ P(AUB) = P(A) + P(B) + 0$

3 0

3 years ago