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vaieri [72.5K]
3 years ago
9

Area and perimeter of 9cm and 11cm

Mathematics
1 answer:
Law Incorporation [45]3 years ago
6 0

Answer: Area: 99cm Perimeter: 40cm

 

Step-by-step explanation:

To find the area, you would multiply 9cm by 11cm because the formula for area is length times width. To find the perimeter, you add all the sides, which would mean you add 9 + 9 + 11 + 11, making the perimeter 40cm.

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3 years ago
2m+n=7<br> 4m+3n=-10<br> Solve using substitution method
jeka57 [31]

Answer:

m=31/2, n=-24. (31/2, -24).

Step-by-step explanation:

2m+n=7

4m+3n=-10

-------------------

n=7-2m

4m+3(7-2m)=-10

4m+21-6m=-10

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2m=31

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5 0
3 years ago
In a 30-60-90 triangle, how many sides do you need to know in order to determine the remaining sides
Sergeeva-Olga [200]
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6 0
3 years ago
Please answer correctly and I will give brainliest and crown plus an extra 20 points
gayaneshka [121]

Answer:

30.28 yd²

Step-by-step explanation:

Area enclosed = area of trapezoid + area of semicircle

= ½(a + b)*h + ½(πr²)

Where,

a = 5 yd

b = 2 + 5 = 7 yd

h = 4 yd

r = ½(4) = 2 yd

Plug in the known values

Area enclosed = ½(5 + 7)*4 + ½(π*2²)

Area enclosed = ½(12)*4 + ½(π*4)

= 6*4 + π*2

= 24 + 2π

= 30.2831853

≈ 30.28 yd² (2 decimal places)

8 0
2 years ago
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