Answer: the length if the three sides are 31 feet, 23 feet and 18 feet.
Step-by-step explanation:
Let x represent the length of the shortest side of the triangle.
Let y represent the length of the second side of the triangle.
Let z represent the length of the third side of the triangle.
The second side of a triangular deck is 5 feet longer than the shortest side. This means that
y = x + 5
The third side is 5 feet shorter than twice the length of the shortest side. This means that
z = 2x - 5
If the perimeter of the deck is 72 feet, it means that
x + x + 5 + 2x - 5 = 72
4x = 72
x = 72/4 = 18
z = 2x - 5 = 2 × 18 - 5
z = 36 - 5
z = 31
y = x + 5 = 18 + 5
y = 23
Answer:
15
Step-by-step explanation:
21 - 6 equals 15 unless if its 21 + 6 then its 27
<span>If you would like to know in which step did the student first make
an error, you can find this using the following steps:
y = 4 - 2z
4y = 2 - 4z
________________
-4(y) = -4(4 - 2z)
</span>4y = 2 - 4z<span>
________________
-4y = -16 + 8z ... Step 2
</span><span>4y = 2 - 4z</span><span>
________________
0 = -16 + 8z + 2 - 4z</span>
<span>16 - 2 = 4z</span>
<span>14 = 4z</span>
<span>z = 14/4 = 7/2</span>
<span>
The correct result would be: Student made an error in Step 2.</span>
u don't multiple u divide 3 and u do the same for 9 divide it by 3