Answer:
Maybe 32
Step-by-step explanation:
Answer:
Step-by-step explanation:
The first step is to distribute.
2(2x) 2(5)
this will give you 4x and 10.
4x +10 +6=20
then, you add 10 and 6, which will give you 16
4x +16=20
next, you subtract 16 on both sides, which will leave you with 4x =4
x=1
Answer:
16 nonfiction + 12 fiction= 28 books
so if each shelf contains only one type of book, 7 times four could be the only option.
4 books on each of the 7 shelves.
The bookcase has 7 shelves
Step-by-step explanation:
The correct answer is B. (3x - 4)(3x + 4)
In order to find this we first can note that the term in the front and the term in the back are both perfect squares. Since the middle term is cancelled out, we can use the difference of two squares to factor.
a^2 - b^2 = (a - b)(a + b)
Since the square root of 9x^2 is 3x, we can use that for a. Since the square root of 16 is 4, we can use that b.
(3x - 4)(3x + 4)
Answer:
600 m³
Step-by-step explanation:
Given:
- length of swimming pool = 30 m
- width of swimming pool = 10 m
- depth at deep end = 3 m
- depth at shallow end = 1 m
To find the volume of the water in the pool, find the area of a cross section (see attached image) and multiply it by the width of the pool.
<u>Area of cross section</u>
= area of rectangle - area of triangle
= (3 × 30) - [1/2 × 30 × (3 - 1)]
= 90 - 30
= 60 m²
<u>Volume of pool</u>
= area of cross section × width
= 60 × 10
= 600 m³
