Answer:
see explanation
Step-by-step explanation:
The perimeter is the sum of the 3 sides, that is
perimeter = 8 + 12 + 17 = 37 cm
To use Heron's formula for area (A)
A = 
where a, b and c are the lengths of sides and s the semi perimeter
s = 37 ÷ 2 = 18.5
let a = 8, b = 12 and c = 17, then
A = 
= 
= 
≈ 43.52 cm² ( to 2 dec. places )
To solve a equation you must first get the variables on the same side of the equal sign. Example: Add -2.5y to both sides so that the variable remains one side only. Now isolate the variable by subtracting 10.5 from both sides. multiply both sides by 10 so that 0.5y becomes 5y, then divide by 5.
Answer:
13
Step-by-step explanation:
you divide 10 by 0.75
Answer:
$220
Step-by-step explanation:
To find for 1 week
$20.00÷2= $10
For 22 weeks
22×10=220
Which situation could best be represented by the integer 120?
1. could be negative but the likely of losing 120 pounds is very low
2. this number would be positive
3. could be between -1 to - infinity
answer: 3. the number of feet below a surface
