Answer: 35%
Step-by-step explanation:
20 bars
7 unshaded - not installed
7/20 = 0.35 = 35%
Answer:
3. y = 1
4. y = 3, x = 12
Step-by-step explanation:
Like the question says, we'll be using substitution, so for the first one, we'll be substituting the value of x into the equation
x = 5
3x- 5y = 10
3 (5) - 5y = 10
15 - 5y = 10
5y = 15 - 10
5y = 5
y = 1
For the next one, it's a similar idea, except the value of x has the variable y in it, which is fine, as there is still only one value in the equation we'll be solving:
x = 4y
x + y = 5
4y + y = 5
5y = 15 (we needed to collect like terms to simplify)
y = 15/5
y = 3
we still have to find x, to this, we substitute the value of y into any of the equations:
x = 4y
x = 4 (3)
x = 12
Hope this helps,
Cate
Reading because she would be spending a lot more time reading than any other subject
Answer:
44 square feet were used to build the aquarium
Step-by-step explanation:
∵ The area of the rectangular prism = Lateral area + 2 Base area
∵ The top of the aquarium is open
∴ The area of the aquarium = Lateral area + Base area
∵ Lateral area = perimeter of base × height
∵ Its base is a rectangle
∵ The dimensions of the base are 4 feet and 2 feet
∵ Its height = 3 feet
∴ Perimeter of the base = 2(4 + 2) = 12 feet
∴ Area of the base = 4 × 2 = 8 feet²
∴ Area of aquarium = 12 × 3 + 8 = 36 + 8 = 44 feet²
