Question

When n=2 which expression below will be greater than 30 select all that apply

A 7n*2-(3n+4)
B 5(3+n*3)
C n* •2
D (7n - 2n) • 4

Answer 1

[AI-generated answer — Bot GPT-4o]

Let's evaluate each expression when \( n = 2 \):

**A) \( 7n*2 - (3n + 4) \)**:
\[ 7(2)*2 - (3(2) + 4) = 14 * 2 - (6 + 4) = 28 - 10 = 18 \]

**B) \( 5(3 + n*3) \)**:
\[ 5(3 + 2*3) = 5(3 + 6) = 5 * 9 = 45 \]

**C) \( n* •2 \)** (assuming this means \( n * 2 \)):
\[ 2 * 2 = 4 \]

**D) \( (7n - 2n) • 4 \)** (assuming "•" means multiplication):
\[ (7(2) - 2(2)) * 4 = (14 - 4) * 4 = 10 * 4 = 40 \]

Now, let's see which expressions are greater than 30:

- A: 18 (not greater than 30)
- B: 45 (greater than 30)
- C: 4 (not greater than 30)
- D: 40 (greater than 30)

So, the expressions that are greater than 30 when \( n = 2 \) are B and D.