Krystal got $10 from his father and $x from his mother. how much did he get altogether​

16

Step-by-step explanation:

they got 16 all together in total

$10x

Step-by-step explanation:

We know that Krystal got $10 from his father but we don't know how much Krystal got from his mother because there's just x for the amount. So, we can just write that Krystal got $10x altogether.

Hope this helps

Triangle

Step-by-step explanation:

In a prism, the base are the two congruent polygons that are parallel to each other. Other faces are often rectangle or squares.

In the given diagram prism, two triangles are parallel to each other.

other three sides are rectangles.

Congruent parallel sides are the triangles.

So, base of the prism is a triangle