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
lozanna [386]
3 years ago
12

What is the value of x in the equation 8x – 2y = 48, when y = 4?

Mathematics
1 answer:
Phoenix [80]3 years ago
8 0
Hey there!

So, if y=(4), this would mean that we would do (2 \ * \ 4) and from this, we would get 8. 

We will then need to find what is (x).

(x) = 7

8*7 = \boxed{56}

So, the equation would really look like . . .

\left[\begin{array}{ccc} 8*(7)-2*4 = 48 \\ \\ x=\boxed{7}\end{array}\right]

Hope this helps.
~Jurgen
You might be interested in
Find the slope passes through (-5,2) and (3,3)
kykrilka [37]
Answer:

1/8

Explanation:

y2-y1/x2-x1

3-2/3-(-5) = 1/8
5 0
3 years ago
Solve: 62x - 3 = 6-2x+1
MatroZZZ [7]

Answer:

x = 5/32 = 0.156

Step-by-step explanation:


6 0
3 years ago
Read 2 more answers
How many ways can a president, vice president, and secretary be selected from a class of 30 students? a. 90 b. 2,068 c. 4,060 d.
Ad libitum [116K]

Answer:

the answer to your question should be 2,068

Step-by-step explanation:

i hope i am right but i think so

7 0
2 years ago
At a glass vase store, 8 out of the last 20 vases shipped were chipped.
Juli2301 [7.4K]

Answer:

Step-by-step explanation: I have no idea

5 0
3 years ago
The authors of a paper describe an experiment to evaluate the effect of using a cell phone on reaction time. Subjects were asked
Serggg [28]

Answer:

a) The 99% confidence interval would be given by (24.409;24.979)  

b) n=464

Step-by-step explanation:

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".  

Part a

The confidence interval for the mean is given by the following formula:  

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}} (1)  

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:  

df=n-1=47-1=46  

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,46)".And we see that t_{\alpha/2}=2.01  

Now we have everything in order to replace into formula (1):  

525-2.01\frac{75}{\sqrt{47}}=503.01  

525+2.01\frac{75}{\sqrt{47}}=546.99  

So on this case the 95% confidence interval would be given by (503.01;546.99)

Part b

The margin of error is given by this formula:  

ME=t_{\alpha/2}\frac{s}{\sqrt{n}} (1)  

And on this case we have that ME =7 msec, we are interested in order to find the value of n, if we solve n from equation (1) we got:  

n=(\frac{t_{\alpha/2} s}{ME})^2 (2)  

The critical value for 95% of confidence interval is provided, t_{\alpha/2}=2.01 from part a, replacing into formula (2) we got:  

n=(\frac{2.01(75)}{7})^2 =463.79 \approx 464  

So the answer for this case would be n=464 rounded up to the nearest integer  

8 0
3 years ago
Other questions:
  • Someone please help me it’s 20 points please help!!!
    9·1 answer
  • What type of graph is shown?
    11·1 answer
  • What are they asking me?
    5·1 answer
  • If there is an 80% chance of rain and a 50% chance of wind and rain, what is the probability that it is windy, given that it is
    9·2 answers
  • In the figure shown below, what fractional part of the circle is shaded?
    8·1 answer
  • PLLLLLSSSS Heeeellppp ill mark brainliest I promisseeeeeeee plsssss
    8·1 answer
  • I’ll give brainliest. If u get these all. Please I’m failing.
    14·1 answer
  • A system of linear equations is graphed. Which ordered pair is the best estimate for the solution to the system? (0, −2) (−412,
    7·1 answer
  • -4,-21,-38 common difference
    10·1 answer
  • If The radius of a quarter circle is 3 miles. What is the quarter circle's perimeter?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!