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
Ksivusya [100]
3 years ago
11

28 is 9 less than twice a number

Mathematics
2 answers:
larisa86 [58]3 years ago
7 0

Answer:

18.5

Step-by-step explanation:

28+9 = 37

so 37 divided by 2 = 18.5

28 is 9 less than 18.5 twice (37)

photoshop1234 [79]3 years ago
5 0

Answer:

Step-by-step explanation:

28=2x-9

37=2x

x=18.5

You might be interested in
According to the University of Nevada Center for Logistics Management, 6% of all mer-
Fudgin [204]

Answer:

a) The point estimate of the proportion of items returned for the population of

sales transactions at the Houston store = 12/80 = 0.15

b) The 95% confidence interval for the proportion of returns at the Houston store = [0.0718 < p < 0.2282].

c) Yes.

We set an hypothesis and construct a test statistics. The test statistics result gives us:

Z calculated  = 2.2545, and this gives us the p-value = 0.0121. We assumed 95% confident interval. Hence, the level of significance (α) = 5%. Conclusively, since the p-value ==> 0.0121 is less than (α) = 5%, the test is significant. Hence, the proportion of returns at the Houston store is significantly different from the returns  for the nation as a whole.

Step-by-step explanation:

a) Point estimate of the proportion = number of returned items/ total items sold = 12/80 = 0.15.

b) By formula of confident interval:

CI(95%) = p ± Z*\sqrt{\frac{p*(1-p)}{n} }  =  0.15 \pm 1.96 *\sqrt{\frac{0.15*(1-0.15)}{80} },

CI(95%) = [0.0718 < p < 0.2282]

c) The hypothesis:

H_{0}: The proportion of returns at the Houston store is not significantly different from the returns  for the nation as a whole.

H_{a}: The proportion of returns at the Houston store is significantly different from the returns  for the nation as a whole.

The test statistics:

Z = \frac{\hat{p} - p_{0}}{\sqrt{\frac{p*(1-p)}{n} }}, where p_{0} is the proportion of nation returns.

Z calculated  = 2.2545, and this gives us the p-value = 0.0121. We assumed 95% confident interval. Hence, the level of significance (α) = 5%. Conclusively, since the p-value ==> 0.0121 is less than (α) = 5%, the test is significant. Hence, the proportion of returns at the Houston store is significantly different from the returns  for the nation as a whole.

6 0
3 years ago
How many solutions does the system have?
sertanlavr [38]
If a solution(s) exists y=y so we can say:

x^2-3x=-2x+2  add 2x to both sides

x^2-x=2  subtract 2 from both sides

x^2-x-2=0  factor

(x-2)(x+1)=0

So x=-1 and 2, using y=-2x+2 we find:

y(-1)=4 and y(2)=-2

So the two solutions occur at the points:

(-1,4) and (2,-2)
4 0
3 years ago
Read 2 more answers
Someone help me asap pleaseee!!
gogolik [260]

Answer:

B is correct.

6 0
2 years ago
Can someone help me with this math homework please!
statuscvo [17]

Answer:

1 = Input G

2 = Input F

3 = Input H

Step-by-step explanation:

5 0
3 years ago
An artist creates a right prism whose base are regular pentagons. He wants to paints the lateral surfaces of the prism. One can
Usimov [2.4K]
He needs 13 cans of paint.

The lateral area is given by the area of 5 rectangles, whose dimensions are 15 by 5:
5(15)(5) = 375

Divide this by 30:
375/30 = 12.5 ≈ 13
6 0
3 years ago
Other questions:
  • Theorem: The segment joining the midpoints of two sides of a triangle is parallel to the third side and half its length.
    15·2 answers
  • Which graph represents the solution for the equation <br> 2/3 x - 2 = -5x + 1?
    12·1 answer
  • Algebra 2 please help me ??
    13·1 answer
  • How many times greater is the value of 3 in 300 than the value of the 3 in 30
    9·2 answers
  • What is the mean of 10,12,15,11
    5·2 answers
  • The sum of two number is 42.Their difference is 12.What are the two numbers?
    11·1 answer
  • a leaky faucet is losing water and it is filling a 5 gallon bucket every 12 hours. At the rate, how many gallons of water will t
    5·1 answer
  • Larry is thinking of a number that is between 0 and 300. What is the correct model for this situation?
    11·2 answers
  • A family has two cars. The first car gets 25 miles per gallon and the second car gets 15 miles per gallon. In a week the two car
    13·1 answer
  • Find an equation for the line with slope m= -2/3
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!