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Helen [10]
3 years ago
14

Find angle A using sin-1

Mathematics
1 answer:
ki77a [65]3 years ago
5 0

Answer:

75°

Step-by-step explanation:

firstly, use the pythagoras theorem

Square root(8²-2²) = 7.75

Then, use sine

sine A= 7.75/8

Sine A=0.9688

A= (sine power of -1) x (0.9688)

A=75.63

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PLEASE HELP ME WITH THIS PLEASE!
sukhopar [10]

Answer:

Area of a rectangle is Width * Length

Apply this to each area the question asks for

AreaTop = 8cm * 4cm = 32cm^{2}

AreaBottom = the same, 32cm^{2}

AreaFront = 2cm * 4cm = 8cm^{2}

AreaBack = the same, 8cm^{2}

AreaLeftSide = 2cm * 8cm = 16cm^{2}

AreaRightSide = the same, 16cm^{2}

TotalSurfaceArea = 16 + 16 + 8 + 8 + 32 + 32 = 112cm^{2}

4 0
4 years ago
Read 2 more answers
Pauline mixed 0.32 liter of syrup with 12 times as much water to make orange squash.She split 1.28 liter of orange squash.Then s
cluponka [151]

Answer:

0.72 litres

Step-by-step explanation:

Litres of syrup = 0.32 litres

Litres of water = 12 times the amount of syrup = 12 * 0.32 = 3.84 litres

Litres of orange squash = litres of syrup + litres of water

Litres of orange squash = (0.32 + 3.84) = 4.16 litres

Amount of orange squash litres split = 1.28 litres

Amount of orange squash left = (4.16 - 1.28) = 2.88 litres

Splitting the amount of squash left equally into 4 :

2.88 litres / 4 = 0.72 litres

4 0
3 years ago
So help me if its this guy who s p a m s bitly or a person who wants f r ee points I will r e p or t them until they are b a n n
Luda [366]
Answer:
B. (1,-4)
Explanation in picture

7 0
3 years ago
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Is 3/4 bigger than one fourth
guapka [62]
Yes 3/4 is bigger than 1/4 3 is bigger than 1 so 3/4 is bigger.
5 0
3 years ago
Read 2 more answers
Find the equation of the line which is perpendicular 10y +5x =3 and passes through (-7,-1)
prohojiy [21]

Answer:

y = 2x +13

Step-by-step explanation:

when 2 lines are perpendicular, the product of the two gradients is -1

i.e. m x m1 = -1

so from 10y + 5x = 3, the gradient m is -0.5

m1 = -1 / -0.5 = 2

using m1 = 2 and pt(-7,-1),

the eqn is y = (m1)x +c

-1 = 2(-7) + c

c= 13

thus y = 2x +13

3 0
3 years ago
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