C, because when you add 45 on both sides, and then after that when you have to subtract 15 in both sides, you get 0 = 120.
For this problem you have yo set up two equations.
White shirts = w Yellow shirts = y
1st: w + y = 21
2nd: 9.95w + 11.50y = 235.30
Now we're going to do system of equations using substitution.
If w + y = 21, then y = 21 - w
If y = 21 - w, then you can substitute this in the second equation for y.
9.95w + 11.50(21 - w) = 235.30
9.95w + 241.5 - 11.50w = 235.30
-1.55w + 241.5 = 235.30
-1.55w = -6.2
w = 4, so 4 whites shirt were sold.
Now I'm finding out how many yellow shirts were sold using one of the two equations at the top.
w + y = 21
4 + y = 21
y = 17
So 17 yellow shirts were sold and 4 white shirts were sold.
Answer:
Is a scalene right triangle
Step-by-step explanation:
Classify the triangle
By the interior angles
Applying the Pythagoras Theorem
substitute the values
------> is true
therefore
Is a right triangle
By the length sides
The triangle has three unequal sides
therefore
Is a scalene triangle
Y = 44
180 - 88 = 92
180 - 92 = 88
88/2 = 44
