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
Makovka662 [10]
3 years ago
6

It’s system of equations but it needs to be solved in substitution if you can answer I’ll give five stars

Mathematics
2 answers:
Aloiza [94]3 years ago
8 0
2x - 3(x-1) = -1
2x -3x + 3 = -1
-1x + 3 = -1
-1x = -4
x = 4

y = 4 - 1
y = 3
chubhunter [2.5K]3 years ago
3 0

Answer:

x =5

y= 4

replace x-1 instead of y in first formula and you have the answer

You might be interested in
An instructor gives a class a set of 10 problems and says that the nal exam will consist of a random selection of 5 of the probl
sweet-ann [11.9K]

Answer:

probability that he or she will answer at least 4 problems correctly = 0.5

Step-by-step explanation:

probability that he or she will answer at least 4 problems correctly is given as;

P (at least 4 correctly) = P (exactly 4 correctly) + P (all 5 correctly)

Since there are 10 problems. 4 is from the 7 problems chosen and 1 is from the 3 problems we can't figure out. Thus, P(exactly 4 correctly) = 7C4 x 3C1

Thus, P (at least 4 correctly) = [ (7C4) x (3C1) ] / (10C5)] + [(7C5)/(10C5)]

= [(35 x3)/252 ] + [21/252]

= [ 105/252 ] + [ 21/252 ]

= 126 / 252

= 0.5

8 0
3 years ago
Please someone explain to me how did we multiply the denominator in this
AleksandrR [38]

ok so what you wanna do is use multiplication

8 0
2 years ago
5. Suppose that a particular candidate for public office is in fact favored by p = 48% of all registered voters. A polling organ
mart [117]

Answer:

Probability that the sample proportion will be greater than 0.5 is 0.8133.

Step-by-step explanation:

We are given that the a particular candidate for public office is in fact favored by p = 48% of all registered voters. A polling organization is about to take a simple random sample of voters and will use the sample proportion to estimate p.

Suppose that the polling organization takes a simple random sample of 500 voters.

<em>Let </em>\hat p<em> = sample proportion</em>

The z-score probability distribution for sample proportion is given by;

               Z = \frac{ \hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }  ~ N(0,1)

where, \hat p = sample proportion

           p = population proportion = 48%

           n = sample of voters = 500

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.

So, probability that the sample proportion will be greater than 0.5 is given by = P( \hat p > 0.50)

  P( \hat p > 0.50) = P( \frac{ \hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } } < \frac{0.50-0.48}{\sqrt{\frac{0.50(1-0.50)}{500} } } ) = P(Z < 0.89) = 0.8133

<em>Now, in the z table the P(Z </em>\leq<em> x) or P(Z < x) is given. So, the above probability is calculated by looking at the value of x = 0.89 in the z table which has an area of 0.8133.</em>

Therefore, probability that the sample proportion will be greater than 0.50 is 0.8133.

6 0
3 years ago
Show work for 694 divided by 3
tatuchka [14]

Answer: 231.3 repeating!

Step-by-step explanation: I used the calculator

8 0
2 years ago
Most of earths surface is mostly covered with
Svetach [21]
<span>C) salt water is the correct answer.</span>
7 0
3 years ago
Other questions:
  • a manufacturer can produce a color pen at a cost of $3. the color pens have been selling for $5 per pen and at this price, consu
    15·1 answer
  • In the figure on the right, Triangle EFG is congruent to Triangle LMN. Find the value of x. Then describe the Transformations th
    14·2 answers
  • Find the gcf of the terms of the polynomial. 45b 27 a) 3 b) 5 c) 9 d) 15
    11·1 answer
  • Help me with my homework
    15·1 answer
  • a spinner is broken into sections labeled 1 to 50 what is the probability on the next spin that you will spin a number greater t
    6·1 answer
  • Which angle has the greater measure?
    5·2 answers
  • PLEASE HELP !! What is mean, meadian &amp;mode
    11·2 answers
  • Te surface area of a right rectangular prism can be found by fnding the sum of the area of each of the faces of the prism. What
    9·1 answer
  • What is 1/4 of £48 Please can someone help me pleasssss
    15·1 answer
  • Ravi buys lunch at a restaurant.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!