Answer:
3 feet by 7 feet
Step-by-step explanation:
perimeter = 20 feet
area = 21 feet²
If the desk is a rectangle:
perimeter = 2l + 2w = 2 (l+w) = 20
2 (l+w) = 20 , divide both sides by 2
l+w = 10
area = l · w = 21
What numbers we know that have sum as 10 and their product as 21?
l + w = 10
l · w = 21
factors of 21 are 1,3,7
3+7 = 10
3 ·7 = 21
The dimensions of the desk could be 3 feet by 7 feet.
Answer:
1.4 (or 7/5)
Step-by-step explanation:
5x = 7
/5 /5
x = 1.4
ANSWER:
A.
B.
C.
D.
STEP-BY-STEP EXPLANATION:
We must bear in mind that when a value increases or decreases in percentage form, the form of the equation is exponential, while when it increases or decreases in a fixed manner, the form of the equation is linear.
Starting from the equation, the equations would then be:
A.
B.
C.
D.
Answer: There are no solutions.
Step-by-step explanation: So the way you do this is by subtracting 9p from both sides, which gets you:
8 = -7
Since 8 is not equal to -7, there is no solution to this equation.