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AleksandrR [38]
3 years ago
5

6. Márcia cortou quatro tiras retangulares de mesma largura, cada qual de um dos lados de uma folha de papel que media 30 cm por

40 cm. O pedaço de papel que sobrou tem 68% da área da folha original. Qual é a largura das tiras? A) 5 cm B) 4 cm C) 3 cm D) 2 cm E) 1 cm 40 30 5 10 D) 10 E) 5​
Mathematics
1 answer:
tangare [24]3 years ago
4 0

Answer:

b

Step-by-step explanation:

i had it

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Find the area of the shaded regions? plss helppp
gregori [183]

Answer:

Larger shaded area = 48pi m^2 and

the small circle has area 4pi m^2.

If you require the as  decimal values they are

150.80 m^2 and 12.57 m^2 to the nearest hundredth.

Step-by-step explanation:

The area of the whole circle = pi r^2 = pi  8^2 = 64pi.

The area of the middle sized circle = pi 4*2 = 16pi.

So the area of the larger shaded region

= 64pi - 16pi = 48pi m^2.

The area of the small circle =  pi r^2 = 2^2 pi = 4pi m^2.

3 0
3 years ago
1. Solve for x. Then find the angle measures of the<br>triangle?<br>(4x)<br>(6x+55)<br>(9x+30)​
nalin [4]

Answer:

x =  5.

First angle = 20°,  Second angle = 85°,  Third angle  = 75°

Step-by-step explanation:

The first angle of the triangle  =  (4 x)

The second  angle of the triangle  =  (6x + 55)

The third angle of the triangle  =  (9x + 30)

By ANGLE SUM PROPERTY of a triangle:

First angle + Second  angle +  Third angle  = 180°

⇒ (4 x)  + (6x+55)   +  (9x+30)​  = 180°

or, (4x + 6x + 9x) + ( 55 + 30) =  180°

or, 19x = 180 - 85

or, 19 x  = 95   ⇒ x = 95 /19 = 5

or, x = 5

Hence, first angle of the triangle =  (4 x) = 4 x 5 = 20°

Second angle = ( 6x + 30)  = 6(5) + 55 = 85°

Third angle = (9x  + 30  = 9(5) + 30 = 75°

8 0
4 years ago
If 3a +5b =10 and 5a +3b =30 what is the average of a and b?
saw5 [17]

Hello, please consider the following.

3a+5b + 5a + 3b = 8(a+b)=10+30=40\\\\a+b=\dfrac{40}{8}=5

And the average is

\dfrac{a+b}{2}\boxed{=\dfrac{5}{2}}

Thank you.

6 0
3 years ago
Solve these equations: |x-6|=-10
pickupchik [31]

Answer:

I got x= -4 as the answer. I hope it helps

6 0
3 years ago
Decide whether the relation is a function?
Nana76 [90]

Answer:

A property of a function is that it gives one output for an input

if a function gives one output for an input, it is a function and otherwise it is not a function otherwise

here, we can see that we have 2 outputs for the input '6'. therefore, it is NOT a function

3 0
3 years ago
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