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OLEGan [10]
2 years ago
14

(4√7 + √3) (√7 - 2√3) Solve by multiplying and simplifying radical expression

Mathematics
2 answers:
Ivenika [448]2 years ago
8 0

Answer:

-10.08

Please Mark Brainliest If This Helped!

OLga [1]2 years ago
3 0
22-7 (square root)21. or -10.8
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Convert 2/3 to a decimal
timofeeve [1]
I think that its
0.666
8 0
3 years ago
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Solve the triangle. Round your answers to the nearest tenth.
Tresset [83]

Answer:

<B = 47°

<C = 28°

b = AC = 28.0

Step-by-step explanation:

Given:

∆ABC

AB = c = 18

BC = a = 37

<A = 105°

Required:

Length of AC = b

measure of angle B and angle C

SOLUTION:

==>Use the sine rule, sin A/a = sinC/c to find the angle of C:

SinA = sin(105) = 0.9659

a = 37

sinC = ?

c = 18

0.9659/37 = sinC/18

Cross multiply

0.9659*18 = 37*sinC

17.3862 = 37*sinC

Divide both sides by 37

17.3862/37 = sinC

0.4699 = sinC

sinC = 0.4699

C = Sin-¹(0.4699)

C = 28.0° (nearest tenth)

==>Find angle B using sum of angles in a triangle:

Angle B = 180 - (105+28)

Angle B = 180 - 133

Angle B = 47°

==>Find length of b using sine rule, b/sinB = c/sinC:

SinC = sin(28) = 0.4695

SinB = sin(47) = 0.7314

c = 18

b = ?

b/0.7314 = 18/0.4695

Cross multiply

b*0.4695 = 18*0.7314

b*0.4695 = 13.1652

Divide both sides by 0.4695

b = 13.1652/0.4695

b = 28.0 (nearest tenth)

6 0
2 years ago
5x+y=27 y=4x using substitution method
Dvinal [7]
 5x + y = 27
substitute: 5x + 4x = 27
combine: 9x = 27
divide (by 9): x = 3
4 0
3 years ago
Read 2 more answers
Help help help help (-_-)
g100num [7]

Answer:

98

Step-by-step explanation:

4 0
3 years ago
How do you change 24 2\5 into decimal?
seropon [69]
24 and 2/5=24+2/5
24=24

0.1=1/10
2/5=x/10
times both sides by 10
20/5=x
4=x
2/5=4/10=0.4


24 and 2/5=24+0.4=24.4
5 0
2 years ago
Read 2 more answers
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