Answer:
- Equation: 7.5 = ((2b-4) + b)
- length = 3.6667 ft
- width = 3.8333 ft
Step-by-step explanation:
perimeter = 2(length+width)
then:
15 = 2(a+b)
a = 2b - 4
a = length
b = width
solve:
15/2 = (a+b)
7.5 = ((2b-4) + b) ⇒ Equation that represents the perimeter of the
rectangle)
7.5 = 3b -4
7.5+4 = 3b
11.5 = 3b
b = 11.5/3
b = 3.8333
a = 2b - 4
a = 2*3.8333 - 4
a = 3.6667
Check:
15 = 2(3.8333 + 3.6667)
15 = 2*7.5
So you got the answer already
Answer:
372 in ^2
Step-by-step explanation:
Wrapping a present is surface area
SA = 2( lw+wh+hl)
= 2 ( 12*3 + 12*10 + 3*10)
= 2 ( 36+120+30)
= 2 (186)
= 372 in ^2
Answer:
(1,40) equation: y=40x
(2,50) equation: y=25x
(4,70) equation: y=17.5x
(7,80) equation: y=11.43x
does not represent a proportional relationship because they all have different equations.
6(a+3) = 18 + 6a
Distrubute the 3 to the a and the 3.
6a + 18 = 18 + 6a
- 6a - 6a
----------------------------
18 = 18
True
Answer: All Real Numbers