4z+2(z-4)=3z+11 perform indicated multiplication on left side
4z+2z-8=3z+11 combine like terms on left side
6z/-8=3z+11 add 8 to both sides
6z=3z+19 subtract 3z from both sides
3z=19 divide both sides by 3
z=19/3
z=6 1/3
So there is only one solution when z=6 1/3
To solve this question, you need to know the rate in which the money is being spent. First, you know the y-intercept, which is 4000, or the money she owned before spending it. Next, you know, how much she had spent in the duration of 3 months. So, if you substitute those numbers into y=ax+b, it would be 2800=-3a+4000 (or 2800=4000-3a either way it is equivalent) If you solve this, you know that the college freshman is spending her money at a rate of $400 per month. Hope this helps :)
Answer:
below
Step-by-step explanation:
The formula for slope is [ y2-y1/x2-x1 ]
2-10/0-(-4)
-8/4
-2
The error is that he/she subtracted the values of each point instead of subtracting the y values together and x values together in reverse order as shown in the formula above.
Best of Luck!
Answer:
152
Step-by-step explanation:
Let x be the number of children tickets sold
2x+x=228
combine like terms
3x=228
x=76
adult tickets is two times the amount of x
2x=152