Answer:
3 * (x + 7)
Step-by-step explanation:
Mark number as x
Then the sum of a number and seven is x + 7
Three times x + 7 can be written as
3 * (x + 7)
Parentheses mean that we first add x and 7 and then multiply their sum by 3
Alternatively you can write it as 3x + 21, since
3 * (x + 7) = 3 * x + 3 * 7 = 3x + 21
The width of rectangle is 21 meters.
Step-by-step explanation:
Given,
Perimeter of rectangle = 98 meters
Width of rectangle = w
Length of rectangle = w+7
Perimeter of rectangle = 2(Length+Width)
Perimeter = 

Dividing both sides by 4

Width of rectangle = 21 meters
The width of rectangle is 21 meters.
Keywords: rectangle, perimeter
Learn more about perimeter at:
#LearnwithBrainly
Answer:
Exact form: 36/35
Decimal form: 1.02
Mixed number form: 1 1/35
Step-by-step explanation:
Hope this helps, have a good day
Answer:

Step-by-step explanation:
The area of a square with side length
is given by
.
Therefore,
.
3<span> multiplyed by 2 and that is how you do it</span><span>
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