I need help asap. anyone?

D

Step-by-step explanation:

Let's look at the first equation first, y = -2x -1. We know its y-intercept is at -1, so if there isn't a line on the graph that intersects at -1, we can cross it of. This means B and C can't be the answers.

Let's now look at the slope of that same equation. It's negative, so it must be going left to right (like this: \ not like this: /).

Only graph D has a line that goes through -1 on the y-axis and has a negative slope!

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.