Melanie recently hired an electrician to do some necessary work. On the final bill, Melanie was charged a

Mathematics

2 answers:

julsineya [31]2 years ago

5 0

the equation should be 35x+485=892

and the answer would be $11.63

Vlada [557]2 years ago

4 0

Equation: 37x+485=892
Answer: X=11

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Maddie buys stock that is worth $22 per share. On the first day, the value of the stock goes up 20%. On the second day, the valu

Marrrta [24]

Answer is $23.76

Calculate 20% of 22 and add it to 22:

20% x 22 = 4.4

22 + 4.4 = $26.4

Calculate 10% of 26.4 and subtract from 26.4

10% x 26.4 = 2.64

26.4 - 2.64 = $23.76

4 0

2 years ago

Compute i^1+i^2+i^3....i^99+i^100

fgiga [73]

Good morning ☕️

Answer:

Step-by-step explanation:

Consider the sum S = i¹ + i² + i³ +. . .+ i⁹⁹ + i¹⁰⁰

S = i¹ + i² + i³ + . . . + i⁹⁹ + i¹⁰⁰

S = a₁ + a₂ + a₃ +. . . + a₉₉ + a₁₀₀

then, S is the sum of 100 consecutive terms of a geometric sequence (an)

where the first term a1 = i¹ = i and the common ratio = i

FORMULA:______________________

$S=(term1)*\frac{1-(common.ratio)^{number.of.terms}}{1-(common.ratio)}$

_______________________________

then

$S=i*\frac{1-i^{100} }{1-i}$

or i¹⁰⁰ = (i⁴)²⁵ = 1²⁵ = 1 (we know that i⁴ = 1)

Hence

S = 0

7 0

3 years ago

12. 8+ 6^2_11 + 7 x 2

Rudiy27

Answer:

$\frac{8 + {6}^{2} }{11} + 7 \times 2 \\ \\ \frac{8 + 6 \times 6}{11} + 7 \times 2 \\ \\ = \frac{8 + 36}{11} + 7 \times 2 \\ \\ = \frac{44}{11} + 7 \times 2 \\ \\ = 4 + 14 \\ \\ = 18$