X+2y=5 x-3y=7 what is the second row of entries for the system determinant? a)1,-3 b)2,-3 c)5,7

A)1,-3

Step-by-step explanation:

X+2y=5

X-3y=7

To write a determinant we take the coefficient of the variables

To get first row we take the coefficients of x and y from the equation x+2y = 5

x or 1x  are same

1x+2y = 5

The coefficient of x  is 1  and coefficient of y is 2

So first row is 1 , 2

We do the same for second row

To get second row we take the coefficients of x and y from the equation x-3y = 7

1x - 3y = 7

The coefficient of x  is 1  and coefficient of y is -3

So second row is 1, -3

2.56 is the width of the garden

step-by-step explanation:

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4