7. during a recent storm clean up there is a mound of m tons of sand at the beach. throughout the day, 1200 tons of sand is added to the mound. two dump trucks come in and take 800 tons of sand each from the mound. at the end of the day, the mound has 2,400 tons of sand. a. write the equation that describes the situation. b. solve for m.

There was 2800 tons of sand in the mound initially.

Step-by-step explanation:

Let there be m tons of sand on the beach initially.

Throughout the day, 1200 tons of sand is added to the mound. So, total sand becomes =

Two dump trucks come in and take 800 tons of sand each from the mound.

Means they took tons of sand

At the end of the day, the mound has 2,400 tons of sand.

This can be modeled as:

Solving for m:

m = 2800

Hence, there was 2800 tons of sand in the mound initially.

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column