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Reptile [31]
3 years ago
6

Which expression is equivalent to the sum

Mathematics
1 answer:
Furkat [3]3 years ago
4 0

Answer:

B. 9(4+8)

Step-by-step explanation:

Start by simplifying the original expression:

36+72=108

Now, let's try each answer choice:

A. 18(2+3)

Add the numbers in the parentheses:

18(5)=90 --> wrong!

B. 9(4+8)

Add the numbers in the parentheses:

9(12)=108 --> correct!

C. 3(10+24)

Add the numbers in the parentheses:

3(34)=102 --> wrong!

D. 2(19+27)

Add the numbers in the parentheses:

2(46)=92 --> wrong!

Therefore the answer is B. 9(4+8)

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Veseljchak [2.6K]

Answer:

The math notation to the given sequence is  a_n=(-1)^{n+1} for n=1,2,3,... is verified and it is true

Step-by-step explanation:

Given sequence is 1,-1,1,-1,...

Let a_1=-1,a_2=1,a_3=-1,a_4=-1,...

To find the math notation for the given sequence :

a_n=(-1)^{n+1} for n=1,2,3,... verify that it is true or not

Put n=1 in the above equation we get

a_1=(-1)^{1+1}

=(-1)^2

Therefore a_1=1

Put n=2 in the a_n=(-1)^{n+1} equation we get

a_2=(-1)^{2+1}

=(-1)^3

Therefore a_2=-1

Put n=3 in the a_n=(-1)^{n+1} equation we get

a_3=(-1)^{3+1}

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Therefore a_3=1

and so on

Therefore the math notation to the given sequence is  a_n=(-1)^{n+1} for n=1,2,3,... is verified and it is true

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When slopes are different, the two lines intersect at <em>one</em> point, the <em>solution</em>.

When slopes are the same, the lines may be either parallel (different y-intercepts) or the same (same y-intercepts). If the lines are parallel, there are no points of intersection, hence <em>no solutions</em>. If the lines are the same line, they intersect at all points, so there are <em>infinitely many solutions</em>.

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