Answer:
It is A 7
Step-by-step explanation:
2(7)+4= 18
14 + 4=18
Answer:
125
Step-by-step explanation:
For arithmetic sequence: aₙ = a₁ + (n-1)d Sₙ = n/2 * (a₁ + aₙ)
a1+a4+a7+a10 = a₁ + (a₁ + 3d) + (a₁ + 6d) + (a₁ + 9d) = 4a₁ + 18d = 2 * (2a₁ + 9d)
2 * (2a₁ + 9d) = 50
2a₁ + 9d = 25
a1+a2+a3...+a10 = 10/2 * (a₁ + a₁₀) = 5 * (a₁ + a₁ + 9d) = 5 * (2a₁ + 9d)
a1+a2+a3...+a10 = 5 * 25 = 125
A+j=59 so j=59-a
and j=a-3
j=j so
59-a=a-3 subtract a from both sides
59-2a=-3 subtract 59 from both sides
-2a=-62 divide both sides by -2
a=31
n=a=31
Ayako has 31 sweets.
Answer:
42 square feet
Step-by-step explanation:
10 ×3= 30
4×3=12 divided by two =6 ×2= 12
(multiply because there are two triangular ends)
12+30=42
Answer:
D. Undefined
Step-by-step explanation:
The graph of x=3 is a straight, vertical line. Therefore, the slope will be undefined.