Answer:
Step By Step Explanation:
Follow PEMDAS Order Of Operations
➤ 
Ans given below
-3r-12=-21
-3r=-21+12
-3r=-9
r=-9\-3
r=3
should be 60 cm if not it's 11
Given are the statements describing the area of the baby quilts:
Inside dimensions = 4 x 5 feet
Border with uniform width = x feet
Total area of the quilt = 30 square feet
A = length x width
Area of inside quilt = 4 x 5
Area of quilt including the border = (4+2x) * (5+2x)
Therefore, the equations that are applicable are:
<span>2: (4+2x)(5+2x)=30
</span><span>4: 4x^2 +18x+20=30</span>
