1. -7×3t−7×−9
2. -21t−7×−9
3. -21t−(−63)
Answer:
-21t + 63
If r = 20, then plug 20 into the equation.
so instead of r - 9, it's 20 - 9
20 - 9 = 11
Answer:
2nd B, 2nd C, 1st A, Last D
Step-by-step explanation:
Picture attached!! Hope this helps!!
one should not try to trick people
one should not pretend to be all-powerful
Let's see what the answer choices mean with respect to the requirement to prove a triangle is a right triangle.
a) two sides are congruent: the triangle is isosceles, but <em>not necessarily a right triangle.</em>
b) two sides are perpendicular: the triangle must be a right triangle.
c) three sides are congruent: the triangle is equilateral so is <em>definitely not a right triangle</em>.
d) sides are parallel: the figure <em>cannot be a triangle</em>.
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The appropriate choice is the second one ...
... Use the slope formula to see if any sides are perpendicular.