I think this is invalid because it is a convenience sample. All of the 5th graders she asked were her friends, and they were all in the art club.
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Answer:
Step-by-step explanation:
We need x first.
AB = DE
12 = 3x -3
4 = x -1 . . . . . divide by 3
5 = x
Now, we can find y.
∠C = ∠F
7x +y = 55
y = 55 -7x = 55 -7(5)
y = 20
Answer:6 = 6x -2
Step-by-step explanation: Solve for the first variable in one of the equations, then substitute the result into the other equation.
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Explanation:
Theorems about triangles identify relationships that can be used to formulate equations that can be used in the problem-solving process.
The idea with problem solving is to start with what you know, and make use of the relationships between that and what you don't know in order to find a solution.
Answer:
Step-by-step explanation:
( 4y - 9) - 7 = 4y (-9 - 7)
this is the associative property of addition