x^2-2x+1=4 subtract 4 from both sides
x^2-2x-3 factor
(x-3)(x+1) set equal to zero
x=3, -1
Answer:
8,400 pound
Step-by-step explanation:
Since one car is 1,400 pound then just multiply 6 by 1,400 pound which is 8,400
Answer:
59°, 71°
Step-by-step explanation:
This is a "sum and difference" problem. All problems of this type have the same answer: the larger of the two numbers is the average of those given.
Then the larger angle is (130 +12)°/2 = 71°. The smaller is 71° -12° = 59°.
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<em>More detailed solution</em>
There are several ways to get there using equations. You can, for example, let L represent the larger number. Then L - D will be the smaller one (where D represent the difference). The sum of the two numbers (S) is ...
L + (L -D) = S
2L = S + D . . . . collect terms, add D
L = (S+D)/2 . . . the larger number is the average of the sum and difference
X(x+4)
(x+2)^2-4
(x+4)x
Hope this helps.
