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
Schach [20]
3 years ago
6

Help neededdd.......

Mathematics
1 answer:
Leya [2.2K]3 years ago
3 0

Answer:

1. -5a

Step-by-step explanation:

The definition of combining like terms is adding their coefficients, for example: 2x + 3x = (2+3)x = 5x.

So for this one, -21a+16a = (-21+16)a = -5a.

You might be interested in
The mean height of women in a country​ (ages 20minus​29) is 64.2 inches. A random sample of 75 women in this age group is select
padilas [110]

Answer:

z=\frac{65-64.2}{\frac{2.84}{\sqrt{75}}} = 2.440

And we can find the probability using the complement rule and with the normal standard table like this:

P(Z>2.440) =1-P(Z

The probability that the mean height for the sample is greater than 65 inches is 0.007

Step-by-step explanation:

Let X the random variable that represent the women heights of a population, and we know the following parameters

\mu=64.2 and \sigma=2.84

We are interested on this probability

P(X>65)

Since the sample size selected is 75>30 we can use the centrel limit theorem and the appropiate formula to use would be the z score given by:

z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}

If we find the z score for 65 inches we got:

z=\frac{65-64.2}{\frac{2.84}{\sqrt{75}}} = 2.440

And we can find the probability using the complement rule and with the normal standard table like this:

P(Z>2.440) =1-P(Z

The probability that the mean height for the sample is greater than 65 inches is 0.007

7 0
3 years ago
Hello!!! Hope your having a nice day! Could you please help me with this question?
mamaluj [8]

Answer:

If the outlier is included in the data, the mean would not change.

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Hanna dose push ups in set of 3.She did 10 sets of push ups today.Then her coach asked her to do 15 more push ups.How many push
Travka [436]
45 because 1set equals 3 push ups and she did ten sets so 10sets equal 30 push ups and then her coach asked her to do 15 more so 30 plus 15 equals 45 so she did 45 push ups that day!
8 0
3 years ago
Read 2 more answers
2527=3<br>3214=8<br>1249=4<br>7321=?<br>A)7 B)3 C)9<br>​
tester [92]

Answer:

c) 9

Step-by-step explanation:

7321=9

8 0
3 years ago
Speedy Messenger Service charges a $30 base fee and $0.75 per pound of urgent package deliveries between office buildings. Quick
Ad libitum [116K]
Speedy messenger, because it costs 67.5. unlike Quick Delivery which costs 75 dollars.
5 0
4 years ago
Other questions:
  • If A = 10 feet, B = 6 feet, C = 1 foot, D = 14 feet, and E = 2 feet, what is the area of the object?
    12·1 answer
  • Darcie wants to crochet a minimum of 3 blankets to donate to a homeless shelter. Darcie crochets at a rate of 1/15, end of a bla
    14·1 answer
  • Combine like terms to simplify<br><br> 1.17 - .07a + (-3.92a)
    12·1 answer
  • The scatterplot shows the number of guests who visited the hotel pool and the temperature on those days . Estimate the location
    6·2 answers
  • Two spheres have volumes of 8r cm3 and 64st cm3. If the surface area of the smaller sphere is 16 t cmwhat is thesurface area of
    11·1 answer
  • Tim's phone service charges $24.07 plus an additional $0.17 for each text message sent per month. If Tim's phone bill was $28.32
    13·2 answers
  • Find the four angles A, B, C and D of the parallelogram ABCD.<br>А<br>3x<br>2x<br>5x​
    6·1 answer
  • akash's salary in 2014 was 25% more than that of 2013,then his previous salary was what % of present salary
    9·2 answers
  • Whats 5 plus 10 multiply by 2 then 75
    10·2 answers
  • What are the coordinates? (?,?)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!