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qwelly [4]
3 years ago
10

What is the measure of angle A?

Mathematics
2 answers:
natulia [17]3 years ago
5 0

Answer:

a = 127

Step-by-step explanation:

These angles are supplementary which means they add up to 180:

15 + a + 38 = 180

a + 53 = 180

a = 180 - 53

a = 127

Alex3 years ago
3 0

angle a + 15° + 38° = 180° [ Linear pair]

a + 53° = 180°

a = 180 - 53 \\ a = 127

So, a = 127°

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En un club de matemática, el 20% prefiere algebra, el
REY [17]

The number of members that prefers geometry are 54members

Given the total number of people in the math club = 120 members

Let algebra  + arithmetic + geometry = 100%

20 + 35 + geometry = 100

55 + geometry = 100

geometry = 100 - 55

geometry = 45%

This shows that the percentage of the member of the club that prefers geometry is 45%

Number of member that prefer geometry = 45% * 120

Number of members that prefer geometry 0.45 * 120

Number of members that prefers geometry = 54 members

Hence the number of members that prefers geometry are 54members

Learn more here: brainly.com/question/3796978

6 0
3 years ago
the dimensions of a smaller rectangle are 3ft by 9ft the dimensions of a larger rectangle are 5ft by 15ft find the ratio of the
Alexxandr [17]

The ratio of the area of the smaller rectangle to the area of the larger

rectangle is \frac{9}{25}

Step-by-step explanation:

The formula of the area of a rectangle is A = l × w, where l and w

are its dimensions

  • The dimensions of a smaller rectangle are 3 ft by 9 ft
  • The dimensions of a larger rectangle are 5 ft by 15 ft

We want to find the ratio of the area of the smaller rectangle to

the area of the larger rectangle

∵ The dimensions of the smaller rectangle are 3 ft and 9 ft

∴ The area of the smaller rectangle = 3 × 9 = 27 feet²

∵ The dimensions of the larger rectangle are 5 ft and 15 ft

∴ The area of the smaller rectangle = 5 × 15 = 75 feet²

Let us find the ratio of the area of the smaller rectangle to the area

of the larger rectangle

→ smaller rectangle  :  larger rectangle

→ 27                           :  75

Divide the both terms of the ratio by 3

→ 9                             :  25

The two terms of the ratio do not divisible by any other number

∴ The simplest form of the ratio is 9 : 25

∴ The ratio of the area of the smaller rectangle to the area of the larger

   rectangle = \frac{9}{25}

The ratio of the area of the smaller rectangle to the area of the larger

rectangle is \frac{9}{25}

Learn more:

You can learn more about the ratio in brainly.com/question/10781917

#LearnwithBrainly

7 0
3 years ago
Use simultaneous equations solve the following problem.
Genrish500 [490]

Let E represent English test and M represent Math test.

M + E = 164

+ <u>M - E = 22</u>

2M = 186 <em>eliminated E by adding the two equations</em>

M = 93 <em>divided both sides by 2</em>

Now, plug that value into either of the equations to solve for E.

M - E = 22 → 93 - E = 22 → -E = 22 - 93 → -E = -71 → E = 71

Answer: Math = 93, English = 71

6 0
3 years ago
Read 2 more answers
An author writes 2400 words a day. The book being written is 80000 words. What percentage does the author write in the book each
guapka [62]
33% is the answer now do u know de wae
6 0
3 years ago
How many solutions exist for the given equation?
katrin2010 [14]

1(x + 12) = 4x - 1\\x+12=4x-1\\13=3x\\x=\frac{13}{3} \\x=4\frac{1}{3}

This equation has only one solution

/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\

P.S. Hello from Russia

7 0
3 years ago
Read 2 more answers
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