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
djverab [1.8K]
3 years ago
9

A random sample of size 25 from a normal population has the mean = 47.5 and the standard deviation s = 8.4. does this informatio

n tend to support or refuse the claim that the mean of the population is = 42.1
Mathematics
1 answer:
Ksenya-84 [330]3 years ago
8 0
What were your given answer choices
You might be interested in
Which choice is equivalent to the expression below?
Vika [28.1K]

Answer:

A

Step-by-step explanation:

simplified version

5 0
3 years ago
PLEASE HELP ME!!
BartSMP [9]

Answer:

Complementary

Step-by-step explanation:

Complementary angles are angles that add up to 90 degrees, and since there is a 90 degree sign on the angles this is complementary.

4 0
2 years ago
Read 2 more answers
Which statement about the equation 3x ^ 2 + 9x - 12 = 0 is true ? 1 . The product of the roots is -12 . 2 The product of the roo
svetlana [45]

Answer:

Option : The product of the roots is - 4

Step-by-step explanation:

3x^2 + 9x - 12 = 0\\\\3x^2 + 12x - 3x - 12 = 0\\\\3x(x+4) -3(x+4) = 0\\\\(3x - 3) (x+ 4) = 0\\\\

Therefore the roots are -4 and 1

The product of the roots are -4 x 1 = -4

5 0
3 years ago
Line 'L' is horizontal and passes through (-5,8). Line 'L is vertical and passes through $(4,-1)$. Find the point of intersectio
Elanso [62]
<h3>The two lines intersect at (4,8)</h3>

Every y coordinate on the horizontal line is the same, so each point has a y coordinate of y = 8. This is to be able to pass through (-5,8)

Every x coordinate on the vertical line is the same, so each point has an x coordinate of x = 4. This is to be able to pass through (4,-1)

Put this together to get the answer (x,y) = (4,8)

4 0
3 years ago
Read 2 more answers
In a recent year, there was about 400,000,000 mobile internet users. ( look at the picture )​
AVprozaik [17]

\bf 400,000,000\implies 4\times 10^8 \\\\[-0.35em] ~\dotfill\\\\ \cfrac{\textit{desktop users}}{\textit{mobile users}}\qquad \qquad \cfrac{1.2\times 10^9}{4\times 10^8}\implies \cfrac{12\times 10^8}{4\times 10^8}\implies \cfrac{12}{4}\times\cfrac{10^8}{10^8}\implies \cfrac{3}{1}

3 : 1, or 3 to 1, thus 3 times as many.

7 0
3 years ago
Read 2 more answers
Other questions:
  • A clothing store offers a 30% discount on all items in the store. Part A: If the original price of a sweater is $40, how much wi
    6·1 answer
  • Parallel to y + 8x = 4 through (3, 4) ; slope-intercept form
    10·1 answer
  • Four times a number, n, added to 3 is 47
    6·1 answer
  • Answer true or false. If​ false, explain briefly. ​a) Some of the residuals from a least squares linear model will be positive a
    10·1 answer
  • Find the perimeter of the
    6·1 answer
  • This is the last question please help
    10·1 answer
  • write the ratios sin m, cos m, and tan m. give the exact value and four decimal approximation. Please help.
    12·1 answer
  • Write 1 ordered pair excluding the y-intercept given the slope and y-int. of this line.
    8·1 answer
  • Difference of two numbers is 19. If the smaller number is 18, find the greater<br> number.
    9·1 answer
  • Name each part below using 14(x)^13<br> a. base?<br> b.power?<br> c.exponent?<br> d.coefficient?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!