Given the linear equation 3x + y = 5, find the slope of its graph
2 answers:
Answer:
B) -3
Step-by-step explanation:
1. First you have to write the equation in slope intercept form. To do that, you must have y be alone on one side.
2. move the 3x to the right side with the 5 by subtracting 3x from both sides. Since 3x will cancel on the left, y will be left alone.
3. Now that you're in slope intercept form, you can find the slope easily. The slope will always be the number in front of x. In this case, the number in front of x is -3. Therefore, -3 is your slope!
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To isolate the variable means to have it by itself on one side of the equation, where the variable equals an expression.
To isolate , we will need to remove the variables and other terms "connected" to the
variable:
By dividing terms "connected" to our variable, we have isolated it one side of the equation.
Answer:
ft
Step-by-step explanation:
We know that the height of the object and the height of the shadow it casts are proportional. Therefore, if we let the length of the tree be , we can set up the following proportion to solve for it:
Solving for , we get:
(Cross-Products Property)
(Simplify)
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's coefficient)
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Therefore, the tree is ft tall. Hope this helps!