Dan's stamp book has 2 pages with 4 rows of stamps on each page. Each row has 2 stamps. How many stamps are on these pages of Dan's stamp book?
Answer
Find out the number of refills keith bought and write equation for it .
To prove
Let us assume that the number of refills be x .
a restaurant sells a coffee refill mug for $6.75.
Each refill costs $1.25
Last month keith spent $31.75 on a mug and refills .
Than the equation becomes
6.75 + 1.25 × x = 31.75
6.75 + 1.25x = 31.75
1.25x = 31.75 - 6.75
1.25x = 25
x = 20
Therefore the number of refills keith bought be 20 .
_____pi ft^3
The two numbers are 35 and 65.
Mathematically, an equation can be defined as a statement that supports the equality of two expressions, which are connected by the equals sign “=”.
For example, 2x – 5 = 13.
Given that, two numbers, their sum is 100 and the difference between them is 30. We need to find the number,
Let the 2 numbers be x and y.
y = x + 30
Sum of the two numbers = 100
x + y = 100
x + (x + 30) = 100
2x = 70
x = 35
y = x + 30 = 65
Hence, the two numbers are 35 and 65.
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