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3 years ago

11

HELPPPPPPP!!!!!!!!!!!!!

2 answers:

marshall27 [118]3 years ago

8 0

Calculate the area of the entire circle first.

A = 3.15 (r) ^2

A = 3.15 (2.25) ^2

Now calculate the area of the white circle

Take the radius - 1.5 to calculate the radius of the white circle

A = 3.15 (.75)^2

Now subtract your two answers

Sonbull [250]3 years ago

4 0

14.23 is your answer!!!!!!!

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P is a rectangle with a length 40 cm and width x cm

romanna [79]

We know that

the length of Q is 25% more than the length of p
so
length Q=1.25*40--------> 50 cm
the area of Q is 10% less than the area of p
Area Q=50*y
Area P=40*x
so
50*y=0.90*[40*x]---------> 50*y=36*x-------> x/y=50/36---> 25/18

the answer
the ratio x:y is 25:18

4 0

3 years ago

A rectangle has a height of 7 and a width of a^4+5a^2+4a .

boyakko [2]

Answer:

7a^4 +35a^2 +28a

Step-by-step explanation:

Area is the product of height and width:

area = height × width

= 7 × (a^4 +5a^2 +4a)

area = 7a^4 +35a^2 +28a . . . . . . use the distributive property

5 0

3 years ago

Read 2 more answers

During a musical an orchestra is playing. As the music plays, the volume changes in the beginning of the piece can be modeled by

Alja [10]

Answer:

The numbers of measure of music played are 1 and 7

Step-by-step explanation:

Given

$s = 10|x - 4| + 50$

Required

Solve for x when s = 80

Substitute 80 for x

$80 = 10|x - 4| + 50$

Subtract 50 from both sides

$80 - 50= 10|x - 4| + 50 - 50$

$30= 10|x - 4|$

Divide through by 10

$\frac{30}{10}= \frac{10|x - 4| }{10}$

$3= |x - 4|$

Reorder

$|x - 4| = 3$

This can be split into

$x - 4 = 3$ or $x - 4 = -3$

Solve for x

$x = 4 + 3$ or $x = 4 - 3$

$x = 7$ or $x = 1$

Hence:

<em>The numbers of measure of music played are 1 and 7</em>

4 0

3 years ago

A square is inscribed in a circle. A tangent is drawn to the vertex. What size angle is formed? Select one: a. 45 b. 180 c. 22.5

olga nikolaevna [1]

Answer:

I believe its A

Step-by-step explanation:

8 0

3 years ago

Quizizz help 10 pts each brainiest guaranteed blah blah blah

emmainna [20.7K]

Answer:

$5x^3-2x^2+2x+9$

Step-by-step explanation:

(5x^3+4x^2)−(6x^2−2x−9)

To find the opposite of 6x^2−2x−9 find the opposite of each term.

5x^3+4x^2−6x^2+2x+9

Combine 4x^2 and 6x^2 to get −2x^2.

5x^3-2x^2+2x+9

5 0

2 years ago

Read 2 more answers