7th Grade CST Review

To simplify the expression 17 + 19 + 3, we add the numbers together. 17 + 19 equals 36, and then adding 3 to 36 equals 39. Therefore, the correct answer is 39.

The correct answer is 133 because when we apply the distributive property, we multiply the number outside the parentheses (7) by each term inside the parentheses (19). This gives us 7 times 19, which equals 133.

An ordered pair represents the coordinates of a point on a graph. In this case, the ordered pair (2, 6) tells us that the x-coordinate is 2, which means it is 2 units to the right of the origin (0). The y-coordinate is 6, indicating that it is 6 units up from the origin. Therefore, the ordered pair (2, 6) represents a point that is 2 units to the right and 6 units up from the origin.

The given equation, y + 16 = 16 + y, demonstrates the commutative property of addition. This property states that the order of adding two numbers does not affect the result. In this case, swapping the positions of y and 16 does not change the sum, indicating the commutative property.

The ratio of 6 lemons to 15 limes can be simplified to 2/5 by dividing both numbers by their greatest common divisor, which is 3 in this case. This simplification gives us the simplest form of the ratio.

The given equation shows that the multiplication operation can be rearranged without changing the result. This property is known as the associative property of multiplication.

The given question asks for the ratio of 50 pens to 24 pencils. To simplify this ratio, we can divide both numbers by their greatest common divisor, which is 2. After simplifying, we get the ratio of 25 pens to 12 pencils, which is equivalent to 25/12.

The given equation, .4x = x*4, demonstrates the commutative property of multiplication. This property states that the order of the numbers being multiplied does not affect the result. In this case, the equation shows that multiplying .4 by x is equivalent to multiplying x by 4, which confirms the commutative property.