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Vanyuwa [196]
3 years ago
5

The isosceles triangle has two sides with the same length. The base is one-half the length of a side. The expression which repre

sents the perimeter, the distance around the triangle, is s + s + one-half s. What is the value of this expression if s = 8?
A triangle with 2 sides with length s.
Mathematics
2 answers:
gavmur [86]3 years ago
8 0

Answer:

20 units

Step-by-step explanation:

s = 8

Perimeter = s + s + \frac{1}{2}*s

                = 8 + 8 + \frac{1}{2}*8

                = 8 + 8 + 4

               = 20 units

kicyunya [14]3 years ago
6 0
20
S=8
1/2s=4
8+8+4=20
Answer is 20
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Answer:

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3 years ago
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4x-y+2z=-6,-2x+3y-z=8,2y+3z=-5
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From third equation count y:
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Substitute "y", which is counted from third equation:
x=\frac{-6-2z+\frac{-5-3z}{2}}{4}=\frac{-\frac{12}{2}-\frac{4z}{2}+\frac{-5-3z}{2}}{4}=\frac{-12-4z-5-3z}{8}=\frac{-7z-17}{8}
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y=\frac{-5-3z}{2} \\ x=\frac{-z-7}{8} \ \\ \hbox{Substitute this to second equation:} \\  -2 \cdot \frac{-7z-17}{8}+3 \cdot \frac{-5-3z}{2}-z=8  \\ \frac{7z+17}{4}+\frac{-15-9z}{2}-z=8 \qquad /\cdot 4 \\ 7z+17-30-18z-4z=32 \\ -15z-13=32 \\ -15z=45 \qquad /:(-15) \\ z=-3 \\ x=\frac{3-7}{8}=\frac{4}{8}=\frac{1}{2} \\ y=\frac{-5+9}{2}=\frac{4}{2}=2
So the solution is:
\begin{cases} x=\frac{1}{2} \\ y=2 \\ z=-3 \end{cases}
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