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
zaharov [31]
3 years ago
9

(8c+2a) (4+b) please solve this​

Mathematics
1 answer:
Degger [83]3 years ago
8 0
(8c+2a)(4+b)
(8c)(4)+(8c)(b)+(2a)(4)+(2a)(b)
32c+8bc+8a+2ab
2ab+8bc+8a+32c
You might be interested in
(20pts) the monthly average new york city temperature in fahrenheit are given below. Mont h jan feb mar apr may jun jul aug sep
HACTEHA [7]

Mean of the low is approximately 47.7  Median of the low is 45 and 50 or 47.5

3 0
3 years ago
Solve: -7x+2y=-3 2x+4y=42
lora16 [44]

i think its three, nine

6 0
3 years ago
What sample size is needed to give a margin of error within in estimating a population mean with 95% confidence, assuming a prev
atroni [7]

Answer:

n = (\frac{1.96\sqrt{\pi(1-\pi)}}{M})^2

The sample size needed is n(if a decimal number, round up to the next integer), considering the estimate of the proportion \pi(if no previous estimate use 0.5) and M is the desired margin of error.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the z-score that has a p-value of 1 - \frac{\alpha}{2}.

The margin of error is of:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

95% confidence level

So \alpha = 0.05, z is the value of Z that has a p-value of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

Needed sample size:

The needed sample size is n. We have that:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

M = 1.96\sqrt{\frac{\pi(1-\pi)}{n}}

\sqrt{n}M = 1.96\sqrt{\pi(1-\pi)}

\sqrt{n} = \frac{1.96\sqrt{\pi(1-\pi)}}{M}

(\sqrt{n})^2 = (\frac{1.96\sqrt{\pi(1-\pi)}}{M})^2

n = (\frac{1.96\sqrt{\pi(1-\pi)}}{M})^2

The sample size needed is n(if a decimal number, round up to the next integer), considering the estimate of the proportion \pi(if no previous estimate use 0.5) and M is the desired margin of error.

4 0
3 years ago
Which expression represents " 5 less than twice x " ?
vekshin1
I think the answer would be #2
3 0
3 years ago
Read 2 more answers
William drove 344 miles in 8 hours. If he continued at the same rate, how far would he travel in 17 hours?
DiKsa [7]

Answer:

731 miles

Step-by-step explanation:

To solve this, we can set up a proportion.

Let's name the number of miles he travels in 17 hours x for now.

8/344=17/x

Simplify 8/344

2/86=17/x

Cross multiply

86*17=2*x

2x=1462

Divide both sides by 2.

x=731

He would travel 731 miles in 17 hours.

4 0
3 years ago
Read 2 more answers
Other questions:
  • Money is borrowed at 15% simple interest. After one year,$1181.05 pays off the loan. How much was originally borrowed?
    15·1 answer
  • (2x+8)+(71-x)=180 what is the x
    10·1 answer
  • Solve these problems not give tips solve
    5·2 answers
  • Verona is solving the equation –3 + 4x = 9. In order to isolate the variable term using the subtraction property of equality, wh
    14·2 answers
  • What is 10 to the 3rd power times 10 to the 2nd power
    12·1 answer
  • Now suppose instead that Jane withdraws $500 from her checking account and uses $300 of this money to pay her federal income tax
    15·1 answer
  • Find the sum or difference of the following ( simplify all answers)
    14·1 answer
  • This graph shows the rate of a scuba diver's ascent to the surface. What does the y-intercept of the graph represent?
    6·1 answer
  • Solve for x: geometry question plz help!!!
    14·1 answer
  • Find the value of x.<br> helpppp
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!