Answer:
step 2
Step-by-step explanation:
The student first made an error in the step 2.
Because if we simplify the equation A in step 1, we should distribute the right side of the equation following the rule a(b-c) = a*b +a*(-c)
So, it would be
–7y = (-7)*(16)+(-7)*(-2z)
=> -7y = -112 + 14z
Answer:
Solution: x=-2
Step-by-step explanation:
Consider the equation 
Plot the graphs of left and right side functions 
and as shown in the diagram. The solution of the equation is the x-coordinate of the point of intersection between those two graphs. As you can see these graphs intersect at point (-2,4), thus, the solution of the equation is x=-2.
Answer:
2, 3, and 4
Step-by-step explanation:
To determine if the given sides make a triangle, the sum of any two sides should be greater than the third.
<h3>a) </h3>
4, 7, and 13
4 + 7 > 13
<h3> 11 > 13 FALSE</h3><h3>b)</h3>
9, 13, and 23
9 + 13 > 23
<h3> 22 > 23 FALSE</h3><h3>c)</h3>
2, 3, and 4
2 + 3 > 4
<h3> 5 > 4 TRUE</h3><h3>d)</h3>
10, 10, and 30
10 + 10 > 30
<h3> 20 > 30 FALSE</h3>
Answer:
Equation: 
The graph is attached.
Step-by-step explanation:
1. Three times the x value means that you must multiply the variable x by 3: 
.
2. According to the problem, you know that the value of 
is two less than three times the x value, which you can express as following:
Equation:
GRAPH:
1. The equation of the line has the form 
, where b is the y-intercept. Therefore, 
2. To find x-intercept substitute y=0 into the equation and solve for x, then:
3. Draw a line that cut at -2 in the y-axis and at 2/3 in the x-axis.
