Answer:

1. D

2. C

3. C

4. A

5. B

6. C

7. C

Explanation:

Spatial figures, are defined simply as three-dimensional objects.

An equation, is a mathematical statement that is made up of two expressions connected by an equal sign. For example, 3x – 5 = 16 is an equation.

10,20,25,30 This is an arithmetic sequence since there is a common difference between each term.

In this case, adding 5 to the previous term in the sequence gives the next term.

In other words,

In other words, an = a 1 + d ( n - 1 ) This is the formula of an arithmetic sequence.

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