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kenny6666 [7]
4 years ago
11

A letter that represents an unknown number is a(n)

Mathematics
1 answer:
marishachu [46]4 years ago
5 0
A variable represents an unknown number
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Trevon’s school is selling tickets to a fall musical. On the first day of ticket sales the school sold 13 adult tickets and 12 s
julsineya [31]

9514 1404 393

Answer:

  • adult: $7
  • student: $10

Step-by-step explanation:

Let a and s represent the prices of adult and student tickets, respectively.

  13a +12s = 211 . . . . . . ticket sales the first day

  5a +3s = 65 . . . . . . . ticket sales the second day

Subtracting the first equation from 4 times the second gives ...

  4(5a +3s) -(13a +12s) = 4(65) -(211)

  7a = 49 . . . . . . . simplify

  a = 7 . . . . . . . divide by 7

  5(7) +3s = 65 . . . . substitute into the second equation

  3s = 30 . . . . . . . subtract 35

  s = 10 . . . . . . . divide by 3

The price of one adult ticket is $7; the price of one student ticket is $10.

7 0
3 years ago
Does someone mind helping me with this problem? Thank you!
Grace [21]

Step-by-step explanation:

∠A + ∠B + ∠C = 180°

Here the value of ∠B and C is given below...we need to find the value of ∠A ....

a + 120° + 40° = 180°

a + 160° = 180°

a = 160° - 180°

a = 20°

...

4 0
2 years ago
HELP PLEASE >>>>>>>>>>>>>>>>>>>>>>
Damm [24]

Answer:

A. \frac{2}{8}

B. \frac{6}{6}

C. \frac{8}{4}

Step-by-step explanation:

For A pick a fraction that is less than a whole number.

For B pick a fraction that is a whole number.

For C pick a fraction that is greater than a whole number.

3 0
3 years ago
The regular pentagon shown has an apothem with a length of 2 centimeters. To the nearest tenth, what is the area of the regular
Rom4ik [11]

Answer:

11.8cm²

Step-by-step explanation:

The area of the regular pentagon is expressed as;

A = pa/2

p is the perimeter of the pentagon

a is the apothem

Since p = 5s

s is the side length, hence;

A = 5sa/2

Get the side length s;

central angle = 360/5

central angle = 72degrees

angle in the right angle triangle =72/2 = 36degrees

Using SOH CAH TOA

sin 36 = x/2

x = 2sin36

x = 1.1755

s = 2x

s = 2.35cm

Get the area

A = 5(2.35)(2)/2

A = 5(2.35)

A = 11.8cm²

Hence the area of the regular pentagon is 11.8cm²

8 0
3 years ago
Read 2 more answers
What is 1/3 the sum of 7 and 11?
stich3 [128]
Add 11 and 7

11 + 7

18

Mulitply 1/3 and 18

1/3 * 18

6

1/3 the sum of 7 and 11 is 6.
6 0
3 years ago
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