Answer: A proper subset is one that contains few elements of the original set whereas an improper subset, contains every element of the original set along with the null set.
Answer:
4
Step-by-step explanation:
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Answer:
To solve this you would do the following:
We know her plan is $15/monthly, regardless of any additional texts/calls she makes.
If 1 minute = $.20 worth of money, we would simply multiply 30 (she made 30 minutes worth of calls) x $.20 ($.20 for each minute). The product is $6.
So, $15 + $6 = $21.
Unless the amount owed per text is mentioned and you forgot to include it in the title, you would not need to take this into consideration.
Answer:
1
the equation (x-4)^2-17=8 has two solutions because <u>it is in a quadratic form.</u>
(x-4)^2-17=8
x²-8x+16-17-8=0
x²-8x-9=0
Doing middle term factorization
x²-9x+x-9=0
x(x-9)+1(x-9)=0
(x-9)(x+1)=0
either
<u>x=9</u>
<u>x=9or</u>
<u>x=9orx=-1</u>
2.
x^2+4x+3=0:
Doing middle term factorization
x²+3x+x+3=0
x(x+3)+1(x+3)=0
(x+3)(x+1)=0
either
x=-3
or
x=-1
<u>Josh’s solution is incorrect because he missed x=-3.</u>
<u>3</u><u>.</u>
x^2-6x+7=0
By <u>using</u><u> </u><u>quadratic</u><u> </u><u>equation</u><u> </u><u>f</u><u>o</u><u>r</u><u>m</u><u>u</u><u>l</u><u>a</u><u>:</u>
Comparing above equation with ax²+bx+c=0
we get
a=1
b=-6
c=7
Now
we have
x=
x=
x=
x=
Taking positive
<u>x</u>=
taking negative
<u>x</u>=