Henrique began to solve a system of linear equations
using the linear combination method. His work is shown
below:
Complete the steps used to solve a system of linear
equations by substituting the value of y into one of the
original equations to find the value of x.
What is the solution to the system?
1. 3(4x - 7y = 28) -- 12x - 21y = 84
-2(6x - 5y = 31) ---12x + 10y = -62
2. 12x - 21y = 84
+ -12x + 10y = -62
-11y = 22
3. y=-2

Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Ahypothesis is: a the average squared deviations about the mean of a distribution of values b) an empirically testable statement that is an unproven supposition developed in order to explain phenomena a statement that asserts the status quo; that is, any change from what has been c) thought to be true is due to random sampling order da statement that is the opposite of the null hypothesis e) the error made by rejecting the null hypothesis when it is true