Answer:
71
Step-by-step explanation:
This is the answer because:
1) First, add Andy's score and Janet's score in order to know how much they got in total:
- Janet's score: 119 + 96 + 145 = 360
- Andy's score: 127 + 74 + 88 = 289
2) In order to find how much more Janet scored, jus subtract Andy's score from Janet's score:
Therefore, the answer is 71.
Hope this helps! :)
Answer:
k=2
Problem:
if the equation x^2 +(k+2)x+2k=0 has equal roots,then the value of k is ..
Step-by-step explanation:
Since the coefficient of x^2 is 1, we can use this identity to aid us: x^2+bx+(b/2)^2=(x+b/2)^2.
So we want the following:
[(k+2)/2]^2=2k
Apply the power on the left:
(k+2)^2/4=2k
Multiply both sides by 4:
(k+2)^2=8k
Expand left side:
k^2+4k+4=8k *I used identity (x+c)^2=x^2+2xc+c^2
Subtract 8k on both sides:
k^2-4k+4=0
Factor using the identity mentioned a couple lines above:
(k-2)^2=0
Since zero squared is zero, we want k-2=0.
Adding both sides by 2 gives k=2.
Applying the definition of the diagonals of a parallelogram, the value of x is: <em>D. 4.</em>
<h3>The Diagonals of a Parallelogram</h3>
- A parallelogram is a quadrilateral that has two opposite sides that are parallel and congruent to each other.
- The diagonals of a parallelogram are equal and also bisect each other into equal segments.
Thus:
12 = 3x (congruent segments)
Divide both sides by 3
4 = x
x = 4
Therefore, applying the definition of the diagonals of a parallelogram, the value of x is: <em>D. 4.</em>
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Learn more about the diagonals of a parallelogram on:
brainly.com/question/7200842
The angle of pi over 2 radians is 90 degrees.
Answer:
your answer is 1
Step-by-step explanation:
you have to first distribute your 3 to the parentheses, which gives you (21-12) so you are then going to subtract 12 from 21. and you get 9. 9 divided by 9 equals 1 so your answer is 1.
(21-12)/9
9/9
1
