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
gavmur [86]
3 years ago
11

Solve 15 + a = 31 for a

Mathematics
2 answers:
pentagon [3]3 years ago
5 0

Answer:

a = 16

Step-by-step explanation:

To solve your question all you have to do is subtract 15 on both sides so,

15 - 15 + a = 31 - 15

Which will give you,

15 - 15 = 0

31 - 15 = 16

So,

a = 16

Hope this helps!!

matrenka [14]3 years ago
3 0

Answer:

<h2>16</h2>

Step-by-step explanation:

15 + a = 31

Move constant to R.H.S and change its sign

a = 31 - 15

Subtract the numbers

a = 16

Hope this helps..

Best regards!!

You might be interested in
Please help me with number 1 please help ???
stira [4]

Answer:

mean: 26

median: 28

mode: 28

range:19

Step-by-step explanation:

hipe this helped hun

3 0
2 years ago
What is the quotient of (3x - 4x? + 8x - 1)(x - 2)?
NISA [10]

Answer:

-4x^2? + 8x? + 11x^2 - 23x + 2

Step-by-step explanation:

8 0
3 years ago
Given the radius is 6 inches, what is the area of the circle?
enyata [817]

Answer:

I wasn't sure how you're supposed to answer, so the answers for each scenario are in the explanation!

Step-by-step explanation:

A=\pi r^{2}

A=\pi (6^{2})

A=\pi (36)

From here, there can be a few different answers:

The exact answer is A=36π inches^2.

If you need to round, round this to wherever you need it: A=113.0973355292326... inches^2

If you're using 3.14 for pi, the answer is A=113.04 inches^2.

8 0
3 years ago
The principal at Riverside High School would like to estimate the mean length of time each day that it takes all the buses to ar
Lilit [14]

Answer:

C) 11

Step-by-step explanation:

1) Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X represent the sample mean for the sample  

\mu population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size  

Since the Confidence is 0.90 or 90%, the value of \alpha=0.1 and \alpha/2 =0.05, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.05,0,1)".And we see that z_{\alpha/2}=1.64

The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{s}{\sqrt{n}}    

And on this case we have that ME =7 and we are interested in order to find the value of n, if we solve n from the last equation we got:

n=(\frac{z_{\alpha/2} s}{ME})^2  

And replacing the values that we got we have:

n=(\frac{1.64(14)}{7})^2 =10.758 \approx 11

C) 11

8 0
3 years ago
What is the second step when factoring the trinomial
Burka [1]

<u>Answer</u>

Factor out the common factor.

<u>Explanation </u>

Factorization consists looking and writing numbers as a product other number. It is expressing number as a product of other numbers.

The first step involves looking for numbers factors and the second one is factoring the common factors.

6 0
3 years ago
Other questions:
  • Explain why |−3| + |9| represents the distance between the points (−3, −5) and (9, −5). brainly
    5·2 answers
  • A fish tank is a cube. Its side length is 4 1/2 feet. The volume of water needed to completely fill the fish tank is ___ cubic f
    12·1 answer
  • Multiply.<br> (3x + 1)(2x – 1)<br><br> Answer plz
    13·2 answers
  • How many 1/3 -cup servings are in 12 4/6<br>cups of juice??​
    15·2 answers
  • x + 3y = 7 x - 3y = 1 Solve the system of equations. A) x = 4, y = 1 B) x = 1, y = 4 C) x = - 2 3 , y = 3 D) x = 3, y = - 2 3
    13·2 answers
  • the graph shows the total number of inches of snow that fell in a town in february over ten year period. what is the approximate
    10·1 answer
  • For the experiment of drawing a single card
    15·2 answers
  • By how much is -23 less than 23?​
    12·2 answers
  • <img src="https://tex.z-dn.net/?f=50.705%20%5Cdiv%202.646" id="TexFormula1" title="50.705 \div 2.646" alt="50.705 \div 2.646" al
    9·2 answers
  • HSV ~ RPU. If HS = 19, find RP<br>if RP can be determined find RP​?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!