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inessss [21]
4 years ago
11

If a person puts 1 cent in a piggy bank on the first day, 2 cents on the second day, 3 cents on the third day, and so forth, how

much money will be in the bank after 40 days? $8.20 $16.40 $0.40 $4.10
Mathematics
1 answer:
cluponka [151]4 years ago
4 0
This is an arithmetic sequence with the common difference being 1

and if u have 1 cent on day 1 and 2 cents on day 2....then on day 40, u would have 40 cents....but we need the sum of all the days..

the sum of an arithmetic sequence can be found using the formula :
sn = n(a1 + an) / 2
n = number of terms = 40
a1 = first term = 1
an = last term = 40

now we sub
s(40) = 40(1 + 40) / 2
s(40) = 40(41)/2
s(40) = 1640/2
s(40) = 820.....820 cents = $ 8.20 <== the sum
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weqwewe [10]

Answer:

D. SAS

Step-by-step explanation:

Given: ΔABC

Bisecting <ABC to create point D implies that BD is a common side to  ΔABD and ΔCBD.

Also,

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BA = BC (given property of the isosceles triangle)

Therefore,

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The reason for statement 5 in this proof is that ΔABD ≅ ΔCBD by SAS (Side-Angle-Side) relations of the congruent triangles.

4 0
4 years ago
I don't get it. Can you also explain why and the steps
Fynjy0 [20]
I think this shows more helpful to u 
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7 0
3 years ago
40.00 jeans 20% discount
Svetllana [295]
20(40)
\frac{20}{100} = 0.2
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4 0
3 years ago
Two angles are complementary. The first angle is 2x degrees. The second angle is (3x +5) degrees. Determine the measure of each
bixtya [17]

Answer:

70 and 110

Step-by-step explanation:

First angle -- 2x

Second angle -- 3x + 5

Therefore,

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8 0
3 years ago
Which operation would isolate the variable in this equation?
Blababa [14]

Answer:

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Step-by-step explanation:

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5 0
3 years ago
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