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3 years ago

11

the band knows 45. song. it play 12 songs in the first set, 15 song in the second set, and 11 songs in the last set. if no songs

were repeated, how many songs does the band know that it didn't play

2 answers:

olga_2 [115]3 years ago

8 0

Your answer would be 7 songs

Dennis_Churaev [7]3 years ago

4 0

Answer:

7 songs

Step-by-step explanation:

12+15+11 is 38

45-38 is 7.

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Please answer this!! will make you brainliast

gulaghasi [49]

Answer:

x = 17 / sqrt (2)

Step-by-step explanation:

first we have to notice that we have a right triangle, this means we can apply Pythagoras

h^2 = c1^2 + c2^2

then we just have to put the values we have and solve the equation

17^2 = x^2 + x^2

289 = 2(x^2)

289/2 = x^2

√289/2 = x

√289 / √2 = x

17 / √2

17 / sqrt (2)

4 0

4 years ago

Here is rectangle A. Block A. Rectangle B is ¹/₅ longer than A Block B. Rectangle C is ¹/₃ longer than B Block C. The total leng

Hoochie [10]

Answer:

Rectangle C is 14 cm longer than B

Step-by-step explanation:

Let x be the length of Rectangle A. Rectangle B is ¹/₅ longer than A Block B,

Therefore the length of rectangle B is:

$x+\frac{1}{5}x$

Rectangle C is ¹/₃ longer than B, therefore the length of rectangle c is:

$x+\frac{1}{5}x+\frac{1}{3}(x+\frac{1}{5}x) =x+ \frac{1}{5}x+\frac{1}{3}x+\frac{1}{15}x=x+\frac{9}{15}x$

The total length of all three rectangles is 133 cm.

Length of rectangle A + Length of rectangle B + Length of rectangle C = 133 cm

$x+x+\frac{1}{5}x +x+\frac{9}{15}x=133\\x+x+x+\frac{1}{5}x +\frac{9}{15}x=133\\3x+\frac{12}{15}x=133\\ 45x+12x=1995\\57x=1995\\x=35cm$

Therefore the length of rectangle A is 35 cm, the length of rectangle B is $35+\frac{1}{5}*35=42\ cm$ and the length of rectangle C is $35+\frac{9}{15}*35=56\ cm$

Rectangle C is ¹/₃ longer than B, which is 14 cm (42\3) longer than B

7 0

3 years ago

The sum of the polynomials 6x3 + 8x2 – 2x + 4 and 10x3 + x2 + 11x + 9 is . Adding 3x – 2 to this sum gives a sum of

Darya [45]

Add the coefficients of like terms.

a) (6x³ +8x² -2x +4) + (10x³ +x² +11x +9)
= (6+10)x³ + (8+1)x² + (-2+11)x + (4+9)
= 16x³ +9x² +9x +13

b) (16x³ +9x² +9x +13) + (3x -2)
= 16x³ +9x² + (9+3)x + (13-2)
= 16x³ +9x² +12x +11

4 0

4 years ago

Find the area of the shaded region. geometry please help if your good at it. will mark brainlist

AnnZ [28]

Area of shaded region = <em>area of circle</em> - <em>area of segment</em>

(where "segment" refers to the unshaded region)

<em>Area of circle</em> = <em>π</em> (11.1 m)² ≈ 387.08 m²

The area of the segment is equal to the area of the sector that contains it, less the area of an isosceles triangle:

<em>Area of segment</em> = <em>area of sector</em> - <em>area of triangle</em>

<em />

130° is 13/36 of a full revolution of 360°. This is to say, the area of the sector with the central angle of 130° has a total area equal to 13/36 of the total area of the circle, so

<em>Area of sector</em> = 13/36 <em>π</em> (11.1 m)² ≈ 139.78 m²

Use the law of cosines to find the length of the chord (the unknown side of the triangle, call it <em>x</em>) :

<em>x</em> ² = (11.1 m)² + (11.1 m)² - 2 (11.1 m)² cos(130°)

<em>x</em> ² ≈ 404.82 m²

<em>x</em> = 20.12 m

Call this length the base of the triangle. Use a trigonometric relation to determine the corresponding altitude/height, call it <em>y</em>. With a vertex angle of 130°, the two congruent base angles of the triangle each measure (180° - 130°)/2 = 25°, so

sin(25°) = <em>y</em> / (11.1 m)

<em>y</em> = (11.1 m) sin(25°)

<em>y</em> ≈ 4.69 m

Then

<em>Area of triangle</em> = <em>xy</em>/2 ≈ 1/2 (20.12 m) (4.69 m) ≈ 47.19 m²

so that

<em>Area of segment</em> ≈ 139.78 m² - 47.19 m² ≈ 92.59 m²

Finally,

Area of shaded region ≈ 387.08 m² - 92.59 m² ≈ 294.49 m²

8 0

3 years ago

Point T is on line segment S U ‾ SU . Given S T = 2 ST=2 and T U = 15 , TU=15, determine the length S U ‾ . SU .

antiseptic1488 [7]

Answer:

17

Step-by-step explanation:

If Point T is on the line segment S U, then ST + TU = SU

Given;

ST=2

TU = 15

Substitte

SU = ST + TU

SU = 2 + 15

SU = 17

Hence the length of SU is 17

5 0

3 years ago