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ijohnh14
21.07.2019 •
Mathematics
The height of a triangle is 9 m less than it’s base. the area of the triangle is 56m 2. find the length of the base
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Ответ:
To find our answer, we must set up and solve an equation.
First step: Set up an expression
Let the base of the triangle be represented by x.
Now we can conclude that the heigth of the triangle can be expressed by the expression x - 9 (since the height is 9m less than it's base).
Second step: Find the area, expressed in terms of x.
The area of a triangle can be found using the following formula
A = base * height * 0.5
(or A = (base * height) / 2)
When we plug in our data, we can find an expression of the area. We express the area in terms of x.
Step 3: Simplify
Work out the parenthesis using rainbow method.
Step 4: Set up and solve the equation
When we've found our area expressed in terms of x, we can set up an equation.
Subtract 56
Divide by 2.
Rule AB = 0, gives A = 0 or B = 0
Step 5: Conclusion
The length of the base of the triangle (which was represented by x) is 16 metres (it can't be -7, since that's a negative number and length can't be negative).
The answer is 16 meters.
~ Hope this helps you!
Ответ:
y=2/2x-4
Step-by-step explanation:
y-intercept form:
y2-y1/x2-x1
the "b" is the point that crosses the y-axis, which is -4