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Korolek [52]
3 years ago
10

Help I will give brainiest​

Mathematics
1 answer:
Vaselesa [24]3 years ago
5 0

Step-by-step explanation:

b + 81° = 117° { exterior angle of a triangle is equal to the sum of two opposite interior angles }

b = 117° - 81°

b = 36°

for no. 14

The angles that are congruent to < 1 are < 4 and < 8.

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The formula below gives the area of a semi-circle, A, with a radius of r.
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Solve for x. <br><br> -3x = -15
yuradex [85]

Answer:

x = 5

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-3x = 15

----     ----

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Ira Lisetskai [31]

Answer and Step-by-step explanation:

P is less than -1 (P < -1) is the answer.

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5 0
3 years ago
How can we write an algebraic expression to describe a two digit number whose unit's digit is 5
suter [353]

Answer:

required expression = 11x-5

Step-by-step explanation:

We have information about the following things :

  1. Its a two digit number
  2. Units digit is 5 less than the tens digit
  3. tens digit is x

Since units digit is 5 less than the tens digit, then the unit digit will become

x-5

Now we have these two things:

  1. Tens digit is x
  2. Units digit is x-5

Now let us look at some two digit numbers like 29 , 43 and 78

in 29, tens digit is 2 and units digit is 9

29 is formed by multiplying the tens digit by 10 and multiplying the units digit by 1 like this : 29 = (2×10) + (9×1)

Similarly;

43 = (4×10) + (3×1)

78 = (7×10)+(8×1)

Now to get out two digit number from the question, we similarly need to multiply the tens digit with 10 and units digit with 1 and add them like this:

tens digit : x

Units digit : x-5

Hence the number is (x × 10) + [(x-5)×1] = 10x + x-5 = 11x-5

hence the required algebraic expression is 11x-5

4 0
2 years ago
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