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2 years ago

100 POINTS AND BRAINILY

Mathematics

2 answers:

Arte-miy333 [17]2 years ago

7 0

Answer:

Step-by-step explanation:

In a right-angled triangle, by definition:

sinX = opposite side / hypothesis

= 5/13

tanX = opposity side / adjacent side

= 5/12

cosX = adjacent side / hypothesis

= 12/13

babunello [35]2 years ago

6 0

$\\ \rm\hookrightarrow sinX=\dfrac{Perpendicular}{Hypotenuse}=\dfrac{5}{13}$

$\\ \rm\hookrightarrow cosX=\dfrac{Base}{Hypotenuse}=\dfrac{12}{13}$

$\\ \rm\hookrightarrow tanX=\dfrac{sinX}{cosX}=\dfrac{5}{12}$

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I really need help on this question if anyone could help

miss Akunina [59]

Answer:

7986 square meter.

Step-by-step explanation:

Cut the composite shape into two shapes.

One rectangle and one triangle.

Rectangle area = 102×66 = 6732

$A=lw$

Triangle area = 66×(140-102)×1/2 = 1254

$A=bh \times 1/2$

Add the areas of the two shapes.

6732 + 1254 = 7986

8 0

3 years ago

I need some help finding the volume of a sphere with a diameter of 18.6cm. The website says the answer I got from my calculator

777dan777 [17]

Answer:

V = 3,367.6 cm³

Step-by-step explanation:

Diameter of sphere (D) = 18.6 cm

radius (r) = ½(18.6) = 9.3

π = 3.14

Formula for volume of a sphere = ⁴/3πr³

Plug in the values

V = ⁴/3 × 3.14 × 9.3³

V = ⁴/3 × 3.14 × 804.357

V = (4*3.14*804.357)/3

V = 3,367.57463

V = 3,367.6 cm³ (nearest tenth)

6 0

3 years ago

PLEASE HELP ASAP!!!

Dimas [21]

Step-by-step explanation:

5x^2+2x=1

5x^2+2x-1=0

x=-b+/-√b^2-4ac÷2a

x=-2+/-√-2^2-(4×5×-1)÷2×5

x=-2+/+√4--20÷10

x=-2+/-√24÷10

x=-2+√24÷10 or -2-√24÷10

x=-2+4.9÷10 or -2-4.9÷10

x=2.9÷10 or -6.9÷10

x=0.29 or -0.69

4 0

3 years ago

Read 2 more answers

The volume of a cuboid whose dimension are 4cm, 5cm, 5cm

Bogdan [553]

100cm3
Volume of a cuboid = (length × width × height)
4x5=20x5=100

7 0

3 years ago

Determine if the following are in proportion :

KATRIN_1 [288]

Step-by-step explanation:

The given numbers are : 32 , 48 , 140 , 120

First number is 32

Second number is 48

Third number is 140

Fourth number is 120

First number/second number :

$\dfrac{N_1}{N_2}=\dfrac{32}{48}\\\\=\dfrac{2}{3}\ ....(1)$

Third number/Fouth number :

$\dfrac{N_3}{N_4}=\dfrac{140}{120}\\\\=\dfrac{7}{6}\ ....(2)$

From equation (1) and (2) we can see that the ratio is not same. Hence, they are not in proportion.

3 0

3 years ago