MATHEMATICS MIDDLE SCHOOL

Solve each question for x.
xe^-x+7e^-x=0

Answers

Answer 1
Answer:

Answer:

x=-7

Step-by-step explanation:

xe^-x+7e^-x=0

factor out the e^-x

e^-x(x+7)=0

e^-x=0, x+7=0

-x=ln(0), x=0-7=-7,

since ln(0) is undefined,

the only solution is -7.

Related Questions

Please help fast!! I'll rate,Thanks&Mark brainliest!1. Which is a simplified form of the expression -4(n + 1) – (n + 2)? A. 2n + 3 B. -3n – 2 C. -4n – 5 D. -5n – 6 2.Which is a simplified form of the expression 3a + 7 – a – 7? A. 2a B. 4a C. 2a + 14 D. 4a – 14 3.Which is a simplified form of the expression -2(x – 9) – x? A. -3x + 18 B. 3x – 18 C. x – 9 D. x + 18 4.Which is a simplified form of the expression -5(y – 2) – 7y? A. –12y + 10 B. 2y – 10 C. -2y + 10 D. 12y – 10 5. Which is a simplified form of the expression -3x – 1 – 5x + 4? A. -2x + 3 B. 2x – 5 C. 8x – 5 D. -8x + 3 6. Which is a simplified form of the expression -7y – (2y + 4)? A. -9y + 4 B. -9y – 4 C. -5y – 4 D. -5y + 4 7.Which is a simplified form of the expression 6(2t – 3) + 3(t + 5)? A. 11t – 2 B. 12t – 8 C. 9t – 2 D. 15t – 3 8.Which is a simplified form of the expression -4(3r – 2) – 2(r + 1)? A. 4r – 1 B. 10r – 7 C. -14r + 6 D. -12r – 1 9. Which is a simplified form of the expression -6a + 2(2a + 2)? A. -2a + 4 B. -2a – 4 C. 2a + 4 D. 2a – 4 10.Which is a simplified form of the expression -3p – 4 + 4p + 8? A. -p – 4 B. 2p – 4 C. p + 4 D. 7p + 4 Please help fast! I promise i'll mark branliest,rate 5 and click Thanks!
1,00+ 1,00+2,00+3,00+4_00
The ratio of three numbers is 4:5:3. the sum of the numbers is 54.what are the three numbers.
1,000,000 exponential form
Tulsa, Oklahoma had a population of 34728 people last year. This year the population has grown by 4833 people. how many people now live in tulsa??

What is an equation that has no common solutions with the line y = 2x + 2?

Answers

 2x + 2y = 4  y = 2x + 2 and x = 4 - 2y 

Kirsten tried to evaluate the expression {12 x 2 - 8} x 2. Her work is below.{12 x 2 - 8} x 2
Step 1: = {12 x 2} - 16
Step 2: = 24 – 16
Step 3: = 8
In which step did Kirsten first make a mistake?
Choose 1 answer:
Step 1
B
Step 2
Step 3
Kirsten did not make a mistake

Answers

Answer:

step 1

Step-by-step explanation:

Answer:

rob

Step-by-step explanation:

I need help someone pls help me figure this out

Answers

8 costumes. Not 8/0.75.

Write down 8 costumes, that's your answer.

1. a baker had 10 sacks containing the following amounts of flour: 4 1/2 kg , 31/4 kg ,2 1/2 kg ,2 1/2 kg , 4 kg ,3 1/4 kg ,4 1/4 kg , 5 kg , 2 1/2 kg , 3 1/4 kg2. plot the measurements on a line plot give the line plot a title and label the axis

3. if the baker redistributed the flour equally among the ten bags how much flour would be in each bag explain your answer

Answers

Baker's Flour in kg Y x x A x x X x x x x x x I ----------------------------------------------------------- S 2 1/2 3 1/4 4 4 1/4 4 1/2 5 X axis It would be 3.5 in each bag after the baker redistributes the flour. This is because the total flour would be 35 kg. 35 divided by 10 is 3.5 kg of flour in each bag.

Write an equation to determine the selling price in dollars, p, on an item that is originally priced s dollars after a markup of 25%

Answers

Answer:

s(15 / 1.5) = 10 (2p + 1/20)

Step-by-step explanation:

:D

I need help please and thank you

Answers

Answer:

C

Step-by-step explanation:

each face is 9 cm squared because 3 times 3 is 9

9 times 6 is 54

squared units for area and surface area

Answer: C) 54 sq cm

Step-by-step explanation:

All of the sides in the example are 3 cm each, and there are 6 sides to a cube. 3^2*6 (3 squared times 6) = 54. Because we squared 3, the answer would be C)54 sq cm.
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