A number plus -44 is 46. What is the number?

To find the missing number, you must set up an equation. Have x equal the number you are trying to find. So x + (-44) = 46. since the 44 is negative, you must add it to the other side to get x=90. To check yourself, plug x back in the equation: 90-44=46, 46=46

Round 6.724 to the nearest hundredth.

Since the hundredth place is the second decimal place, you must look at the next number which is a 4. Since 4 is less than 5, you must round down to get 6.72. If the next number was greater than or equal to 5, the answer would be 6.73.

Find the equation of the line that passes through the points (-1 , -1) and (-1 , 2).

We first must find the slope m. m = (y2 - y1) / (x2 - x1) = (2 - -1) / (-1 - -1) = 3 / 0 The slope is undefined (when the denominator is 0) which means the line is perpendicular to the x axis. Since both points have x coordinates equal to -1, the equation is given by: x= -1.