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
Natasha2012 [34]
2 years ago
6

Please help! A is not -3 as I’ve seen some answer with that.

Mathematics
1 answer:
Arte-miy333 [17]2 years ago
6 0

Answer:

a) x = 5

b) x = 4

Step-by-step explanation:

a) \frac{3x+4}{2} = 9.5

  3x+4 = 9.5(2)

      3x = 19-4

        x = 15/3

         x = 5

b) \frac{7+2x}{3} = 5

  7+2x = 5(3)

      2x = 15-7

        x = 8/2

         x=4

You might be interested in
Find 3 equivalent ratios for<br> 4/12.
Neko [114]

Answer:

8:24, 24: 72, 16:48

Step-by-step explanation:

There's a lot just multiply them by the same number

4 0
2 years ago
Read 2 more answers
A recent survey found that 70% of all adults over 50 wear
lubasha [3.4K]

Answer:

There is an 84.97% probability that at least six wear glasses.

Step-by-step explanation:

For each adult over 50, there are only two possible outcomes. Either they wear glasses, or they do not. This means that we use the binomial probability distribution to solve this problem.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinatios of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

In this problem we have that:

n = 10, p = 0.7

What is the probability that at least six wear glasses?

P(X \geq 6) = P(X = 6) + `P(X = 7) + P(X = 8) + P(X = 9) + P(X = 10) = 0.8497

There is an 84.97% probability that at least six wear glasses.

5 0
3 years ago
For the following paired data, (1) Calculate the correlation coefficient, r, and (2) at the 0.05 significance level, determine w
expeople1 [14]

Answer:

Linear correlation exists

Step-by-step explanation:

Given the data :

X : | 2 4 5 6

Y : | 6 9 8 10

Using technology to fit the data and obtain the correlation Coefficient of the regression model,

The Correlation Coefficient, r is 0.886

To test if there exists a linear correlation :

Test statistic :

T = r / √(1 - r²) / (n - 2)

n = number of observations

T = 0.886 / √(1 - 0.886²) / (4 - 2)

T = 0.866 / 0.3535845

T = 2.449

Comparing Pvalue with α

If Pvalue < α ; Reject H0

Pvalue = 0.1143

α = 0.05

Pvalue > α ; We reject the null and conclude that linear correlation exists

7 0
3 years ago
15x8-x=4(2x+20) solve
Cloud [144]

Answer:


x≈ −1.21039852,1.25324234 assuming was the exponent to 15x


6 0
2 years ago
Solve using any method 4x-y=20 and -2x-2y=10
dsp73

Answer:

if you're trying to find the slope, it is (3, -8) were you looking for the slope?

Step-by-step explanation:

i hope this helps, have a great day:)

7 0
2 years ago
Read 2 more answers
Other questions:
  • To decrease an amount by 30%, what single multiplier would you use?
    10·2 answers
  • This partial circle has a radius of 11 inches.
    7·1 answer
  • Which of the following is an example of perpendicular lines? I'm thinking it's B, but not sure
    6·2 answers
  • Find the flow rate through a tube of radius 6 cm, assuming that the velocity of fluid particles at a distance r cm from the cent
    5·1 answer
  • the length of a rectangle is 3 more than its width. the perimeter of the rectangle is 58cm. what are the rectangles dimensions?
    12·1 answer
  • Find the Area of the shape below.
    11·1 answer
  • Assume that you have a sample of n 1 equals 6​, with the sample mean Upper X overbar 1 equals 50​, and a sample standard deviati
    14·1 answer
  • Find the point of intersection by graphing each of the following lines: x+y=4<br> x+2y=6
    8·1 answer
  • 70 POINTS PLEASE HELP!! Use the two equations: f (x) =x^2 and g (x) =4x+1 to determine the solutions to the following function o
    14·1 answer
  • PLEASE HELP IMMEDIATELY, I NEED A RESPONSE TONIGHT!!!
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!