<img src="https://tex.z-dn.net/?f=5%20%7B%7D%5E%7Bn%20%2B%201%7D%20%20%2B%205%20%7B%7D%5E%7Bn%20%2B%202%7D%20" id="TexFormula1"

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dem82 [27]

3 years ago

title="5 {}^{n + 1} + 5 {}^{n + 2} " alt="5 {}^{n + 1} + 5 {}^{n + 2} " align="absmiddle" class="latex-formula">

Mathematics

1 answer:

alex41 [277]3 years ago

5 0

Step-by-step explanation:

there 5^(n+1) + 5^(n+2) = 5^n x 5^1 + 5^n x 5^2 breaking them as x^(a+b) = x^a x x^b

then taking common 5^n from both terms

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sleet_krkn [62]

Answer: x>2
Explanation:
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3 0

3 years ago

Alvin's age is two times Elga's age. The sum of their ages is 63. What is Elga's age?

lawyer [7]

Answer: Alvin = 42 yrs , Elga = 21 yrs

Step-by-step explanation:

Let Elga's age be x , and Alvin's age be y ,since Alvin is two times Elga's age , then

Alvin's age = 2x , that is

y = 2x ............... equation 1

The sum of their ages is 63 implies

x + y = 63 .............. equation 2

Solving the resulting linear equations by substitution method.

Substitute equation 1 into equation 2 , we have

x + 2x = 63

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x = 63/3

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Therefore : Elga is 21 years old , then Alvin will be 21 x 2, which will be 42

8 0

3 years ago

The perimeter of a regular pentagon is represented by the expression 35d-25. Daryl correctly wrote expression to represent the o

Triss [41]

Answer:

Each one of the sides is equal to 7d-5

Step-by-step explanation:

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The perimeter of a regular pentagon is given by

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35d -25 = 5s

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6 0

3 years ago

What are plane shapes

madreJ [45]

Answer: A closed, two-dimensional or flat figure

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

What are the factors of 3x²+7x-20?

Leya [2.2K]

$3x^2+7x-20=0\\\\a=3;\ b=7;\ c=-20\\\\\Delta=b^2-4ac\\\\x_1=\frac{-b-\sqrt\Delta}{2a};\ x_2=\frac{-b+\sqrt\Delta}{2a}\\\\\Delta=7^2-4\cdot3\cdot(-20)=49+240=289;\ \sqrt\Delta=\sqrt{289}=17\\\\x_1=\frac{-7-17}{2\cdot3}=\frac{-24}{6}=-4;\ x_2=\frac{-7+17}{2\cdot3}=\frac{10}{6}=\frac{5}{3}\\\\\\3x^2+7x-20=3(x+4)(x-\frac{5}{3})\\\\\\3x^2+7x-20=0\iff x=-4\ \vee\ x=\frac{5}{3}$

4 0

4 years ago