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grin007 [14]
3 years ago
9

Plz help i will give brainliest

Mathematics
1 answer:
slava [35]3 years ago
7 0

Answer:

i am kinda unsure butfirst do 2x divided by 3 and go from there

Step-by-step explanation:

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An equilateral triangle has a perimeter of 48 cm. What is the area?
KiRa [710]

Answer:

A=64\sqrt{3}\ cm^2

Step-by-step explanation:

we know that

An <u><em>equilateral triangle</em></u> has three equal sides and three equal interior angles (each interior angle measure 60 degrees)

so

The perimeter is equal to

P=3b

where

b is the length side of the equilateral triangle

we have

P=48\ cm

substitute

48=3b

solve for b

b=48/3\\b=16\ cm

Find the area

The formula of area applying the law of sines is equal to

A=\frac{1}{2}b^2sin(60^o)

substitute the value of b

A=\frac{1}{2}(16)^2sin(60^o)

sin(60^o)=\frac{\sqrt{3}}{2}

A=\frac{1}{2}(16)^2(\frac{\sqrt{3}}{2})

A=64\sqrt{3}\ cm^2

6 0
3 years ago
Evaluate (b+c) if a=2,b=-5 and c= -3
anastassius [24]
The answer would be -8
6 0
3 years ago
Read 2 more answers
Question 13. Please
Sonbull [250]

Answer:

d

Step-by-step explanation:

Δ OPG is right with hypotenuse OG being the radius of the circle

Using Pythagoras' identity in the right triangle

OG² = OP² + PG²

[ PG = 11 , since OP is the perpendicular bisector of FG ]

OG² = 8² + 11² = 64 + 121 = 185

Δ OQS is right with hypotenuse OS being the radius

Using Pythagoras' identity

OS² = QS² + OQ² , that is

185 = 13² + x²

185 = 169 + x² ( subtract 169 from both sides )

16 = x² ( take the square root of both sides )

4 = x → d

8 0
3 years ago
A cylindrical container has a volume of 36 cm³. Another container made out of the same material is similar to the first containe
USPshnik [31]
I hope this helps you



Volume = pi.r^2.h


36= pi.r^2.h



Volume =pi.r^2.3/4h


Volume =pi.r^2.h.3/4


Volume =36.3/4


Volume =9.3


Volume =27

3 0
3 years ago
Read 2 more answers
Jack is a professional weightlifter. his personal lifting record was 125.8kg. at a weightlifting competition, he broke his own r
Softa [21]

Answer:

126.34kg

Step-by-step explanation:

125.8+0.54=126.34kg

Convert 540 grams to kilograms` 0.54 kilograms, and add to the previous record

5 0
3 years ago
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