D is the correct answer.
When you add fractions, the answer is always rational.
1/5+-2/3= 3/15-10/15 = -7/15
A B and C are all irrational because they are nonterminating and nonrepeating decimals, which cannot be represented as a ratio of two integers. When you add a fraction to an irrational number, the result is still irrational.
The sum of the length and width ratio units is 6+2 = 8. Since this stands for 24 cm, each ratio unit stands for 3 cm. The actual dimensions are
18 cm : 6 cm : 21 cm
The surface area (S) is given in terms of length (L), width (W), and height (H) by
S = 2(LW +H(L+W))
= 2((18 cm)*(6 cm) +(21 cm)*(18 cm +6 cm))
= 2(108 cm² +(21 cm)*(24 cm))
= 1224 cm²
The surface area of the box of cereal is 1224 cm².
Answer:
Step-by-step explanation:
5x - 7 = 4x - 1...subtract 4x from both sides
5x - 4x - 7 = -1...add 7 to both sides
5x - 4x = -1 + 7...simplify
x = 6