Answer:
108 pens
Step-by-step explanation:
48/4=x/9
4x=432
x=108
Answer:
= 34.5
Step-by-step explanation:
The n th term of an arithmetic sequence is
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Given 
= 121.5, then
a₁ + (69 × 1.5) = 121.5
a₁ + 103.5 = 121.5 ( subtract 103.5 from both sides )
a₁ = 18
Hence
= 18 + (11 × 1.5) = 18 + 16.5 = 34.5
Answer:
There are 48 marbles in the bag
Step-by-step explanation:
red: blue : total
3 8
there are 18 red
18/3 = 6
Multiply everything by 6
3*6 8*6
18 48
There are 48 marbles in the bag
15,56^2=x^2+x^2
242,1136=2x^2
x^2= 242,1136:2=121, 0568
x≈11,003
Answer:
21
Step-by-step explanation:
14+7=21.
You do this to allow you to get that outcome, because you know 7*7=49.
Therefore 21-14=7
7*-7=49
