D. As the phrase states, you are adding 12 to the product of 2 and t, which is your given equation.
Answer:
![x=2.8](https://tex.z-dn.net/?f=x%3D2.8)
Step-by-step explanation:
![7x+3=10x-5.4](https://tex.z-dn.net/?f=7x%2B3%3D10x-5.4)
Subtract 3 from both sides:
![7x+3-3=10x-5.4-3](https://tex.z-dn.net/?f=7x%2B3-3%3D10x-5.4-3)
![7x=10x-8.4](https://tex.z-dn.net/?f=7x%3D10x-8.4)
Subtract 10x from both sides:
![7x-10x=10x-8.4-10x](https://tex.z-dn.net/?f=7x-10x%3D10x-8.4-10x)
![-3x=-8.4](https://tex.z-dn.net/?f=-3x%3D-8.4)
Divide both sides by -3:
![\frac{-3x}{-3}=\frac{-8.4}{-3}](https://tex.z-dn.net/?f=%5Cfrac%7B-3x%7D%7B-3%7D%3D%5Cfrac%7B-8.4%7D%7B-3%7D)
![x=2.8](https://tex.z-dn.net/?f=x%3D2.8)
Given:
trap door = 130 square feet.
1st item: 6ft 5in wide & 8ft 9in long
⇒ (6ft * 12 in) + 5 in & (8ft *12 in) + 9 in
⇒ 77inches by 105 inches
⇒ 8,085 square inches
2nd item: 13ft 4in wide & 7ft 8in long
⇒ (13ft * 12in)+ 4 in & (7ft *12in) + 8 in
⇒ 160 inches by 92 inches
⇒ 14,720 square inches
3rd item: 5ft 6in wide & 12ft 4in long
⇒ (5 ft * 12in) + 6 in & (12ft * 12in) + 4in
⇒ 66 inches by 148 inches
⇒ 9,768 square inches
130 square feet convert to square inches.
130 sq. ft * 144 sq.in/sq.ft = 18,720 sq. in
18,720 sq. in / 160 inches = 117 inches
Length = 160 inches ; Width = 117 inches
Perimeter = 2(160 + 117)
P = 2(277)
P = 554 inches
Answer:
{x,y}={8,5}
Step-by-step explanation:
12x + 12y = 156 4x + 6y = 62