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natta225 [31]
3 years ago
15

This shape is made of three identical semicircles.

Mathematics
1 answer:
Yuliya22 [10]3 years ago
8 0

Answer:

48cm

Step-by-step explanation:

The perimeter of first shape is 36cm. There are 3 semi circle (curves).

Therefore,

3 curves of semicircle (arc length) = 36

1 curve of semicircle (arc length) = 36/3

= 12cm

In picture 2,

4 semicircles (They've mentioned that they used the same semicircle for the 2nd shape also)

So,

4×12 = 48cm

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If f(x)=-2x+8 determine the value of y for each x value 7,8,9
monitta

Answer:

y= 22, 24, 26

Step-by-step explanation:

2(7)+8

14+8

22

2(8)+8

16+8

24

2(9)+8

18+8

26

3 0
3 years ago
Find sin(a) in the triangle? <br> A.)12/35<br> B.)12/37<br> C.)35/12<br> D.)35/37
Svet_ta [14]

Answer:

12/37

Step-by-step explanation:

sin alpha = opposite side/ hypotenuse

sin alpha = 12/37

8 0
3 years ago
A sum of $4200 was invested, part at 8% and the remainder at 11%. If $426.00 was earned in interest after one year, how much was
enot [183]

Answer:

$3000 was invested at 11%.

Step-by-step explanation:

The total interest was $426.  This was comprised of interest earned at 8% (represented by e) and (separately) interest earned at 11% (represented by v).

Then e + v = $4200 total investment, and  

i = $426 = e(0.08)(1 year) + v(0.11)(1 year)

We eliminate the variable e as follows:  since e + v = $4200, e = $4200 - v.  Thus,

i = $426 = e(0.08)(1 year) + v(0.11)(1 year) becomes:

i = $426 = ($4200 - v)(0.08)(1 year) + v(0.11)(1 year)  

This is one equation in one unknown, the amount of $ invested at 11%.

Performing the indicated multiplications:

426 = 4200(0.08) - 0.08v + 0.11v.  Simplifying this further, we get:

426 = 336 + 0.03v.

Then 90 = 0.03v, and v = 90 / 0.03 = $3000.

$3000 was invested at 11%.

6 0
3 years ago
Pls help hella lost
irga5000 [103]
L = -4,4
E = -2, -3
N = 2,1
I = 4,3
E = 1,3
4 0
2 years ago
Nikes cost $75.<br> They were reduced to $60. What is the percent of change?
Mamont248 [21]

Answer:

15%

75-60= 15

hope this helps

8 0
3 years ago
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