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3 years ago

Hi, can somoene please check why my solution and explain why I get the wrong answer.

Mathematics

1 answer:

trapecia [35]3 years ago

4 0

Answer:

$a_n=(1-n)2^n+3^n$

Step-by-step explanation:

You are correct down to the part where you add the partial results:

$a_n=a_n^h+a_n^p=A3^n+B2^n-n2^n\\\text{Using the given starter values, we can find A, B:}\\a_0=2=A\\a_1=7=3A+2B+2\\\text{has solution A=1, B=1, so ...}\\\\a_n=3^n+2^n-n2^n$

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Solve the following inequality for p. Write your answer in simplest form. 4p -1 < 3p – 10

Oksanka [162]

Answer:

p < -9

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS
Equality Properties

Step-by-step explanation:

Step 1: Define inequality

4p - 1 < 3p - 10

Step 2: Solve for p

Subtract 3p on both sides: p - 1 < -10
Add 1 on both sides: p < -9

Here we see that any number p less than -9 would work as a solution to the inequality.

3 0

3 years ago

Consider the line segment below that is five feet long. Is Q the midpoint of PR? Justify your answer.

givi [52]

Answer:

Q is not the midpoint of PR

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

If Q is the midpoint of PR

then

PQ=QR

substitute the given values and solve for x

$15x-2=5x+3\\15x-5x=3+2\\10x=5\\x=0.5$

Remember that

$PR=5\ ft$ ----> given problem

$PR=PQ+QR\\PR=(15x-2)+(5x+3)$

substitute the value of x

$PR=(15(0.5)-2)+(5(0.5)+3)$

$PR=(5.5)+(5.5)$

$PR=11\ ft$

Compare with the given value of PR

$5\ ft\neq 11\ ft$

therefore

Q is not the midpoint of PR

4 0

3 years ago

What is the value of x in the equation 0.2(x + 1) + 0.5x = –0.3(x – 4)

almond37 [142]

0.2x+0.2+0.5x=-0.3x+1.2
0.7x+0.3x=1.2-0.2
x=1
That's your answer.

8 0

4 years ago

Read 2 more answers

Which graph shows the solution to the following system? y= 1/4x - 2

iogann1982 [59]

Y = 1/4 x - 2

=> a linear function => a straigh line

=> slope = the coefficient of x => slope = 1/4

=> x = 0 => the y-intercept = -2

=> y = 0 => 0 = 1/4 x - 2 =>x = 8 => point (8,0)

With all that information you can identify the graph because it is a straight line that passes through (0,-2) and (8,0), its inclination (slope) is 1/4, and the graph goes through the quadrants I, III and IV (there are no points in the quadrant II)..

4 0

3 years ago

The cost in dollars, y, of a large pizza with x toppings from Pat’s Pizzeria can be modeled by a linear function. A large pizza

Lisa [10]

Answer: b. $22.75

Step-by-step explanation:

Given : A large pizza with no toppings costs $14.00. A large pizza with 2 toppings costs $17.50.

Let x denotes the number of toppings and y be the cost of that pizza.

Then, $y=mx+c$ , m= cost per topping and c= cost of pizza without any topping.