I'm confused, this is about covering metric units of length.

mount saint helens, a volcano, erupted on may 18, 1980. before eruption, mount st. helens was 2,950 meters high. after eruption, it was 2,550 meters high.

(questions)
what is the difference in height of mont st. helens?

before the eruption, how many kilometers high was mount st. helens?

which of the following is eguals to 2 meters?
(a) 200mm (b) 20cm (c) 200km

explain how you would convert 4m to millimeters.

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions