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alexgriva [62]
3 years ago
10

Suppose an isosceles triangle ABC has A = 45° and b = c = 4. What is the length of a2? A.22.63

Mathematics
1 answer:
weeeeeb [17]3 years ago
3 0

Since b = c, the angles B and C also equal

 so you get
180 - 45 = 135
135/2 = =67.5 for each angle

now we know 2 sides and all 3 angles, use the law of sines to find a

b/sin B = a/sin A

4/(sin 67.5) = a/(sin 45)

a = 4(sin 45)/(sin 67.5)

a^2 = (4(sin 45)/(sin 67.5))^2

a^2 = 9.37

 Answer is C

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erica [24]
What you can do is split one of the binomials and then apply the distributive property if f(x) = (x + 3)(x -2) split the 1st binomial f(x) = x(x -2) + 3(x -2) now apply the distributive property to get
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4 0
3 years ago
Read 2 more answers
5. After paying a tax of 8 palsa per rupee a man saves Rs. 18,400 per month Then his monthly income is 2 Points) 20,000​
Hunter-Best [27]

Answer:

92% of Income is  Rs 18400

Step-by-step explanation:

I = 18400/.92 = Rs 20000

8 0
2 years ago
If $396 is invested at an interest rate of 13% per year and is compound continuously, how much will the investment be worth in 3
Sveta_85 [38]

Answer:

The investment at the end of the period will be $584.89.

Step-by-step explanation:

FV = PV e⁽ⁿˣ⁾

FV = Future Value = ?

PV = Present Value = $396

n = Interest Rate = 13%

x = time in years = 3

e = mathematical constant = 2.7183

FV = 396 x 2.7183⁽⁰°¹³ ˣ ³⁾

FV = 396 x 1.4770

FV = $584.89

7 0
3 years ago
What is the value of 7/9 x 2/3 ?
Elan Coil [88]

Answer:

42/81 or 0.5185185

Step-by-step explanation:

7/9 × 2/3

The hcf of 9 and 3 is 9

7/9 × 2/3

2/3 × 3= 6/9

7/9× 6/9 = 42/81 or 0.5185185

5 0
3 years ago
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Find x for me please thanks<br><br> ill give brainilest thaks
Mekhanik [1.2K]

Answer:

105°

Step-by-step explanation:

On the other side it is 75°. The 2 lines are parallel. X is 105° because 180°-75°=105°.

I hope you understood it :)

8 0
3 years ago
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