National Assessment Grades A-f

In the equation yx4 = xy = 1, we are given that yx4 is equal to xy and both are equal to 1. This implies that yx4 and xy are reciprocals of each other. The only number that satisfies this condition is 4, as 4 multiplied by its reciprocal 1/4 equals 1. Therefore, the value of x in this equation is 4.

The given expression is 2.2 + 2.2x2. To solve this, we need to follow the order of operations, which is multiplication before addition. So, we first multiply 2.2 by 2, which gives us 4.4. Then, we add 2.2 to 4.4, resulting in 6.6. Therefore, the correct answer is 6.6, not 8.8.

The equation x - a = 2 is given, and it is stated that a = 6. To find the value of x, we substitute the value of a into the equation, which gives x - 6 = 2. Solving for x, we add 6 to both sides of the equation, resulting in x = 8. Therefore, the value of x is 8.

The given question is a simple addition problem, asking for the sum of 66 and 66. Adding these two numbers together gives us a total of 132.

The given question is asking for the result of squaring the number 2. When a number is squared, it is multiplied by itself. So, 2 squared is equal to 2 multiplied by 2, which is 4.

To find 1/2 of 500, we divide 500 by 2, which gives us 250. Then we multiply 250 by 6, which equals 1500. Finally, we multiply 1500 by 5, resulting in 7500.

To find 25% of 500, we can multiply 500 by 0.25. This gives us 125, which is the answer.

A sphere is a 3-D shape that has only one side because it is a closed curved surface with no edges or vertices. It is a perfectly symmetrical shape in which every point on the surface is equidistant from the center. Since it has no edges or corners, it can be considered as having only one continuous side.

The car is driving at a speed of 25 meters per hour. Therefore, it will take 1 hour for the car to drive 25 meters.

The given question is a simple addition problem. When we add 6.6 and 4.4, the sum is 11.0.

Since a triangle has three sides, and each side is given as 35cm, we can find the perimeter by adding all three sides together. Therefore, the perimeter of the triangle is 35cm + 35cm + 35cm = 105cm.

An angle from 180 degrees to 360 degrees is called a reflex angle. A reflex angle is greater than 180 degrees but less than 360 degrees. It is formed by extending one of the arms of the angle beyond 180 degrees.

The semi circumference of a circle is half of its circumference. Therefore, if the circumference of the circle is 25 cm, then its semi circumference would be half of that, which is 12.5 cm.