<span>Let x = the width
:
It says,"The length of a rectangle is 4 less than 3 times the width." write that as:
L = 3x - 4
:
If the perimeter is 40, find the dimensions of the rectangle.
:
We know: 2L + 2W = 40
:
Substitute (3x-4) for L and x for W
2(3x-4) + 2x = 40
:
6x - 8 + 2x = 40; Multiplied what's inside the brackets
:
6x + 2x = 40 + 8; do some basic algebra to find x; (added 8 to both sides)
:
8x = 48
:
x = 48/8
:
x = 6 which is the width
:
It said that L = 3x - 4, therefore:
L = 3(6) - 4
L = 18 - 4
L = 14; is the length
:
Check our solutions in the perimeter:
2(14) + 2(6) =
28 + 12 = 40</span>
The first choice is the closest one.
Answer:
B
Step-by-step explanation:
9 out of 36 chose country, that is expressed as a fraction
= 
Thus calculate this fraction of 240
× 240 = 
= 60 → B
Answer:
Other: 
, 0.25
Whole Numbers: -20, -6
Natural Numbers: 532, 10, 0, 
Step-by-step explanation:
Natural numbers have to be positive whole numbers such as 10 and 0
Whole numbers are similar, but you can have negative numbers here. You just can't put fractions in there.
The 3rd section is a little odd, Integers don't use fractions or decimals, same as whole numbers. The fractions and decimal numbers would go outside of that section.
Extra note: might be a tricky one because it is in fraction form but it is also written as 3. This means it is a natural number. The reason numbers such as and 0.25 are not natural numbers is because they cannot be put as whole numbers.
