1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mr_godi [17]
3 years ago
11

Challenge: x(2)+9x+c:-D​

Mathematics
1 answer:
kvv77 [185]3 years ago
3 0

Answer:

×(2)+9×+c

2×+9×+c =

11x+c

You might be interested in
What is the value of the expression |a + b| + |c| when a = –6, b = 2, and c = –11?
iVinArrow [24]
The answer is D. -15 because I am assuming that the vertical lines mean brackets, and we have to work out the brackets first (according to BIDMAS). Doing so, -6 + 2 = -4 and -4 + -11 = -15.
8 0
3 years ago
A particular battery claims to have a mean life of 400 hours with a standard deviation of 30 hours. Approximately what percent o
Svetach [21]

Using the normal distribution, it is found that 25.14% of the batteries will last more than 420 hours.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

Z = \frac{X - \mu}{\sigma}

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

In this problem, we have that the mean and the standard deviation are given, respectively, by:

\mu = 400, \sigma = 30.

The proportion of the batteries will last more than 420 hours is <u>one subtracted by the p-value of Z when X = 420</u>, hence:

Z = \frac{X - \mu}{\sigma}

Z = \frac{420 - 400}{30}

Z = 0.67

Z = 0.67 has a p-value of 0.7486.

1 - 0.7486 = 0.2514.

0.2514 = 25.14% of the batteries will last more than 420 hours.

More can be learned about the normal distribution at brainly.com/question/24663213

#SPJ1

3 0
2 years ago
Richard has enrolled in a 401(k) savings plan. He intends to deposit $250 each month; his employer does not contribute to his ac
astraxan [27]

Answer:

Richard will have $60,000 in his account in 20 years.

Step-by-step explanation:

(1) Multiply $250 x 12

(2) Multiply the answer of $250 x 12 which is 3000 by 20

(3) Final answer would be $60,000

7 0
3 years ago
Using the numbers and symbols, solve 7x = 42
spin [16.1K]

Answer:

you currently have the value of x × 7, you need to divide it by 7 to find the value of x.

42 ÷ 7 = 6

Step-by-step explanation:

4 0
3 years ago
I need help with this problem​
dexar [7]

The answer to the equation is 15

5 0
3 years ago
Other questions:
  • What is the y-intercept of the graph that is shown below?
    8·1 answer
  • Rational number between 2 and 3 ?
    12·2 answers
  • -3(x+2)=21 What is the answer and show the work please.
    13·1 answer
  • The null and alternative hypotheses for a population proportion, as well as the sample results, are given. Use StatKey or other
    14·1 answer
  • Harrys dog weighs 12 7/8 pounds. what is the weight of harry's dog written as a decimal
    8·2 answers
  • Please help i have no clue what to do
    11·1 answer
  • Assume that thermometer readings are normally distributed with a mean of degrees and a standard deviation of 1.00degrees C. A th
    15·1 answer
  • The length of a rectangle is 5 cm less than twice its width. The perimeter of the rectangle is 26 cm. What are the dimensions of
    5·1 answer
  • Does the table represent exponential growth or exponential decay?
    15·1 answer
  • Consider the function.<br> f(x) = 2 x + 12<br> What is the y-intercept of f1(x)?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!