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sveta [45]
3 years ago
7

The diagram shows a logo​

Mathematics
1 answer:
Charra [1.4K]3 years ago
5 0

Answer/Step-by-step explanation:

✔️Find EC using Cosine Rule:

EC² = DC² + DE² - 2*DC*DE*cos(D)

EC² = 27² + 14² - 2*27*14*cos(32)

EC² = 925 - 756*cos(32)

EC² = 283.875639

EC = √283.875639

EC = 16.85 cm

✔️Find the area of ∆DCE:

Area = ½*14*27*sin(32)

Area of ∆DCE = 100.15 cm²

✔️Since ∆DCE and ∆ABE are congruent, therefore,

Area of ∆ABE = 100.15 cm²

✔️Find the area of the sector:

Area of sector = 105/360*π*16.85²

Area = 260.16 cm² (nearest tenth)

✔️Therefore,

Area of the logo = 100.15 + 100.15 + 260.16 = 460.46 ≈ 460 cm² (to 2 S.F)

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Answer:

B. 9 : 21

Step-by-step explanation:

Multiply numerator and denominator by 3:

... 3/7 × 3/3 = 9/21 ⇒ 9 : 21

_____

Any denominator that is not a multiple of 7 will not work. 35 is a multiple of 7 (=5×7), but 12 (=4×3) is not the same multiple of 3.

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MrMuchimi

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astraxan [27]

Answer:

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Step-by-step explanation:

Perimeter=4×side

(8x-28)=4×x [let length be x]

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7 0
3 years ago
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ZanzabumX [31]

Answer:


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If b=a+1/3, what is the value of b-1 in terms of a? explain.
Vikki [24]

Answer:a=b-\frac{1}{3}a=b−

​3

​

​1

​​  

Step-by-step explanation:

1 Subtract \frac{1}{3}

​3

​

​1

​​  from both sides.

b-\frac{1}{3}=ab−

​3

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2 Switch sides.

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