Question

1. The sum of 5 times a number and 15 is equal to 120. Find the number.
2.Find the sum of 1 and 3
3. Simplify: 10.43 +4.6-4.254​

Answer 1

Answer:

i) The number is 21.

ii) sum = 4

iii) 10.776

Step-by-step explanation:

i) Let x be the number.

Then, 5x + 15 = 120

➡️ x+ 3 = 24

➡️ x = 21

The number is 21.

ii) Sum of 1 and 3 = 1 + 3 = 4

iii) 10.43 + 4.6 - 4.254

= 10.776