Simplify the expression: 10s+–2s
2 answers:
Answer:
Step-by-step explanation:
Expression can be broken down into a couple of parts.
- A term (like 10s, or -2s)
- The variable (what the unknown value is being represented by, in this case, s)
- The coefficient (the number next to the variable, showing what to multiply the variable by - in this case, 10 and -2)
When we have multiple terms with the same variable, we can perform operations on them assuming they have the same variable - for example, 5x + 6x = 11x, as 5+6=11.
We can apply the same logic here, however, note that adding a negative is the same as subtracting a positive. For example, 5 + -2 is the same as 5-2.
Therefore, our final expression is .
Hope this helped!
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Answer:
22.4
Step-by-step explanation:
using altitude theorem, the height of the triangle is 20
let y = height
10/y = y/40
y² = 400
y = or 20
Now we can us the Pythagorean Theorem to find 'x':
10² + 20² = x²
100 + 400 = x²
x= ≈ 22.4