Answer:
96
Step-by-step explanation:
commom difference = d
a₆ + a₇ = 16
a₅ + a₈ = (a₆ - d) + (a₇ + d) = a₆ + a₇ = 16
a₄ + a₉ = (a₆ - 2d) + (a₇ + 2d) = a₆ + a₇ = 16
Similarly,
a₃ + a₁₀ = 16, a₂ + a₁₁ = 16, a₁ + a₁₂ = 16
so
a₁ + a₂ + ... + a₁₁ + a₁₂ = 6 x 16 = 96
<u>Answer:</u>
- Carly's expenditure was $240 and the number of boxes of cards was required is 24 boxes.
<u>Step-by-step explanation:</u>
We know that:
- 48 + 8(b) = Carly's expenditure
- 10(b) = Carly's expenditure
- 48 + 8b = 10b
- B = Boxes of cards
<u>Work:</u>
- 48 + 8b = 10b
- => 48 + 8b - 8b = 10b - 8b
- => 48 = 2b
- => b = 24
<u>Now, let's substitute the value of b into any equation.</u>
<u>Hence, Carly's expenditure was $240 and the number of boxes of cards was required is 24 boxes.</u>
Hoped this helped.

Answer:
i'm pretty sure its B but it would be helpful if i could see a graph
Step-by-step explanation:
The area of the base (six triangles with a base 15m and a height 7.5√3m):

The area of side walls (six triangles with a base 15m and a height 12m)

The surface area:
The answer is both sets of statistics give the same information:
First, find the mean: 2 • 5 = 10, 3 • 4 = 12, and 10 • 1 = 10
10 + 12 + 10 = 32
Ten dots altogether : 32 ÷ 10 = 3.2
Mean = 3.2
Second, find the median: 2, 2, 2, 2, 2, 3, 3, 3, 3, 10
2, 2, 2, 2, <em>2, 3,</em> 3, 3, 3, 10
2 + 3 = 5
5 / 2 = 2.5
Median - 2.5