Last year the sales at a bookstore were 75% fiction books, and 25% nonfiction books.

Step-by-step explanation:

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x = 1

y = 1

Substitute into one of the equations

Rearrange variables to the left sider of the equation

Combine like terms

Divide both sides of the equation by the coefficient of variable

Determine the sign for multiplication or division

Cross out the common factor

Substitute into one of the equations

The solution of the system is

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Answer:

14

Step-by-step explanation:

x = 2, y = 4, z = 6

x (3 + z) - y

= 2 (3 + 6) - 4

= 2 (9) - 4

= 14

Answer:

Height of the tree is 40.0 meters.

Step-by-step explanation:

From ΔABC,

m∠ABC = 90°

Since, m∠ABC = m∠CBD + m∠ABD

90° = 6° + m∠ABD

m∠ABD = 90°- 6° = 84°

By triangle sum theorem in ΔABD,

m∠ABD + m∠BDA + m∠DAB = 180°

84° + 29° + m∠BDA = 180°

m∠BDA = 180° - 113°

             = 67°

By sine rule in ΔABD,

h =

h = 39.98

h ≈ 40.0 meters

Therefore, height of the tree is 40.0 meters.