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
blondinia [14]
2 years ago
6

(x+5)(y+10) what is the answer to this equation?

Mathematics
1 answer:
netineya [11]2 years ago
7 0
(x + 5)(y + 10)
x(y + 10) + 5(y + 10)
x(y) + x(10) + 5(y) + 5(10)
xy + 10x + 5y + 50
You might be interested in
When you buy an item on which sales tax is charged,the total cost is calculated by the formula T=P+s/100p where T is the total c
Gennadij [26K]

Given:

The formula for total cost is

T=p+\dfrac{s}{100}p

where, p is the price of item and s is the sales tax rate (as a percent).

You pay $14.77 for an item priced at $14.

To find:

The the tax rate.

Solution:

You pay $14.77 for an item priced at $14. So,

Total cost (T) = $14.77

Price of item (p) = $14

Putting T=14.77 and p=14 in given formula, we get

14.77=14+\dfrac{s}{100}(14)

14.77-14=\dfrac{s}{100}(14)

0.77=\dfrac{s}{100}(14)

Multiply both sides by 100.

77=14s

Divide both sides by 14.

\dfrac{77}{14}=s

5.5=s

Therefore, the tax rate is 5.5%.

7 0
3 years ago
4,275,000,000 in scientific notation
Leni [432]
4.275x10^{9}
6 0
3 years ago
A box of coins contains nickels, dimes and quarters. The value of the coins is $4.00. If there were 3 times as many nickels, hal
frez [133]

Step-by-step explanation:

s ks ok w merto s mak osmwokwmsos

8 0
3 years ago
Read 2 more answers
33 is 15less than k.
RoseWind [281]

Answer:

  • k = 48

Step-by-step explanation:

Given expression:

  • 33 is 15 less than k

Convert this into equation and solve for k:

  • 33 = k - 15
  • k = 33 + 15
  • k = 48

So the <u>value of k is 48</u>

4 0
1 year ago
Read 2 more answers
While researching the cost of school lunches per week across the state, you use a sample size of 45 weekly lunch prices. The sta
Drupady [299]

We assume the lunch prices we observe are drawn from a normal distribution with true mean \mu and standard deviation 0.68 in dollars.


We average n=45 samples to get \bar{x}.


The standard deviation of the average (an experiment where we collect 45 samples and average them) is the square root of n times smaller than than the standard deviation of the individual samples. We'll write


\sigma = 0.68 / \sqrt{45} = 0.101


Our goal is to come up with a confidence interval (a,b) that we can be 90% sure contains \mu.


Our interval takes the form of ( \bar{x} - z \sigma, \bar{x} + z \sigma ) as \bar{x} is our best guess at the middle of the interval. We have to find the z that gives us 90% of the area of the bell in the "middle".


Since we're given the standard deviation of the true distribution we don't need a t distribution or anything like that. n=45 is big enough (more than 30 or so) that we can substitute the normal distribution for the t distribution anyway.


Usually the questioner is nice enough to ask for a 95% confidence interval, which by the 68-95-99.7 rule is plus or minus two sigma. Here it's a bit less; we have to look it up.


With the right table or computer we find z that corresponds to a probability p=.90 the integral of the unit normal from -z to z. Unfortunately these tables come in various flavors and we have to convert the probability to suit. Sometimes that's a one sided probability from zero to z. That would be an area aka probability of 0.45 from 0 to z (the "body") or a probability of 0.05 from z to infinity (the "tail"). Often the table is the integral of the bell from -infinity to positive z, so we'd have to find p=0.95 in that table. We know that the answer would be z=2 if our original p had been 95% so we expect a number a bit less than 2, a smaller number of standard deviations to include a bit less of the probability.


We find z=1.65 in the typical table has p=.95 from -infinity to z. So our 90% confidence interval is


( \bar{x} - 1.65 (.101),  \bar{x} + 1.65 (.101) )


in other words a margin of error of


\pm 1.65(.101) = \pm 0.167 dollars


That's around plus or minus 17 cents.




3 0
3 years ago
Read 2 more answers
Other questions:
  • I don’t understand need help
    5·2 answers
  • A truck is carrying grape juice,orange juice and apple juice in a ratio 3:6:1.if there are 15 grape juice how many orange juice
    5·1 answer
  • Solve for p. 2(p + 1) = 18 What is the answer? (A.8 B.8.5 C.9.5 D.10)
    11·2 answers
  • HELP NOW PLEASE!<br>What is the volume of a cube with length 8 feet? <br>V=lwh   <br><br> _ft³
    10·1 answer
  • Write the equation in standard form, factored form, then identify the zeros. y=-(x-1)^2+25​
    5·1 answer
  • joey made a deposit into an account that earns 6% simple interest.After three years, joey had earned $400. How much was joey's i
    9·2 answers
  • A mother of six has money saved in a jar. She gave the money
    5·2 answers
  • What is 2 ways to show 1:2
    12·2 answers
  • Find the domain and range of f(x)=4*(1/2)^x
    15·1 answer
  • Suppose Amanda wants to have $800,000 in her IRA at the end of 30 years. She chooses to invest in an annuity that pays
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!