Question

1 + 2 + 3 + 4 + 5 + 6 + 7 multiplied to by 5 is equal to​

Answer 1

Step-by-step explanation:

$\frac{x(x + 1)}{2} \times 5 \\ \frac{7 \times (7 + 1)}{2} \times 5 \\ \frac{7 \times 8 \times 5}{2} \\ = 140 \: \: \: \: ans.$

Hope it can help you.

Answer 2

Answer:

140

Step-by-step explanation:

1. 1+2=3

2. 3+3=6

3. 6+4=10

4. 10+5=15

5. 15+6=21

6. 21+7=28

Then 28 us multiplied by 5 which is equal to

5*28=140