Solve the system using substitute. SHOW ALL YOUR WORK

{4y + 5y = 7
{Y = 3x + 9

Step-by-step explanation:

4(3x+9) + 5(3x+9) = 7

multiply it out

12x+36 + 15x + 45 = 7

subtract whole numbers on both sides

12x + 15x = -74

add the xs

27x= -74

divide by 27

x=-74/27

or

x= -2.74

start with a line segment pq that we will copy. mark a point r that will be one endpoint of the new line segment. set the compasses' point on the point p of the line segment to be copied. adjust the compasses' width to the point q. the compasses' width is now equal to the length of the line segment pq.

step-by-step explanation:

part d

step-by-step explanation:

theresa talked her parents into getting sd cards for her phone and her brother’s phone. inserting an sd card into a phone gives it more storage. they both get 8-gigabyte sd cards. how many bits of storage come with each sd card? type your answer in both scientific and standard notation.