Translate "more than 18m" into an inequality.
This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.
ScanSolve AI Answer
Question 49:
Step 1: Translate "more than $18m$" into an inequality.
This means $d > 18$.
Step 2: Translate "not more than $23m$" into an inequality.
This means $d \le 23$.
Step 3: Combine the inequalities.
The distance $d$ must satisfy both conditions: $d > 18$ and $d \le 23$.
Combining these gives $18 < d \le 23$.
The correct option is B.
$$\boxed{\text{B. } 18 < d \le 23}$$
Question 50:
Step 1: Distribute the negative sign into the parentheses.
$$12b - (5 + 2b) - 7 = 12b - 5 - 2b - 7$$
Step 2: Group like terms.
$$ (12b - 2b) + (-5 - 7) $$
Step 3: Combine like terms.
$$ 10b - 12 $$
The correct option is A.
$$\boxed{\text{A. } 10b - 12}$$
That's 2 down. 3 left today — send the next one.
