The ages of a group of randomly selected adult females have a standard deviation of years. Assume that the ages of female statistics students have less variation than ages of females in the general population, so let years for the sample size calculation. How many female statistics student ages must be obtained in order to estimate the mean age of all female statistics students? Assume that we want % confidence that the sample mean is within one-half year of the population mean. Does it seem reasonable to assume that the ages of female statistics students have less variation than ages of females in the general population?
Answer:
?
Step-by-step explanation:
Simplify the expression $(x-4)(x-7) + (3-x)(2+x).$
Help please!
The equation -10x + 34 is the simplification for the given expression.
Addition Sign RulesHere it is important to remember the rules for the addition of integers numbers:
+ + Add Final result (+)
- - Add Final result (-)
+ - Subtract Final result (the sign of the integer having a greater value )
- + Subtract Final result (the sign of the integer having a greater value )
Multiplication Sign RulesThe rules for multiplication of numbers are:
+ + or - -The result presents a positive sign (+) because the signs are same.
+ - or - +The result presents a negative sign (-) because the signs are different.
First, you should apply the distributive property and the multiplication sign rules.
(x-4)(x-7) + (3-x)(2+x)
x²-7x-4x+28+6+3x-2x-x²
After that, you should simplify the previous result from addition or subtraction sign rules.
x²-11x+34+x-x²
-10x + 34
Read more about the distributive property here:
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Ms. Clipner had 15 days to prepare her seventh
grade class for their next math exam. On the
first day. she gave the class 7 math problems to
complete. Each day following, Ms. Clipner gave
the class 5 more math problems to solve in prepa-
ration. How many problems did Ms. Clipner give
the class for review
26
G. 72
H.
J. 82
K. 156
Answer:
82
Step-by-step explanation:
add 7 to 5 fifthteen times
If Clipner had 15 days to prepare her seventh grade class for their next math exam. On the first day. she gave the class 7 math problems to
complete. Each day following, Ms. Clipner gave the class 5 more math problems to solve in preparation. Then 82 problems did Ms. Clipner give
the class for review
What is Equation?Two or more expressions with an equal sign is called as Equation.
By given data, On the first day. she gave the class 7 math problems to complete. Each day following, Ms. Clipner gave the class 5 more math problems to solve in preparation.
We need to find how many problems did Ms. Clipner give
the class for review .
=7+15(5)
=7+75
After adding 75+7, we get
=82
Hence 82 problems did Ms. Clipner give the class for review.
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If I have 2 apples and take away 1 apple, how many peanuts do I have left?
Answer:
Cannot be determined with the information given in and of itself.
Step-by-step explanation:
You would have 1 apple left. However, there is absolutely no information given about the original amount of peanuts, how many peanuts are given to you, how many peanuts are taken from you, how many apples to a peanut, etc. etc. No answer in peanuts can be given.
I would appreciate Brainliest, but no worries.
Answer:
0
Step-by-step explanation:
if you have 2 and you take one away you have 1,
you'll have 0 peanuts since apples can't become peanuts, unless you have them already or buy them; apples won't help you get peanuts.
2. Find the GCF of: - 4x^2 and 28x^3
Answer: 4x^2
Step-by-step explanation: Multiply that by -1 to get -4x^2 and multiply by 7x to get 28x^3
Which graph or table shows a proportional relationship? Select all that apply.
Answer:
The number of days and total miles run one.
Step-by-step explanation:
A proportional relationship is y/x being the same everytime. The first table doesnt fit with that. The second graph isnt a straight line. The third table isnt coreect either. Lastly the forth table workng.
Sorry if im incorrect
. A carbon filter is used by a scientist to filter out small particles of soil and rocks
from a water sample taken from a stream. The exponential function f(x) =
500(0.35) * can be used to model the function. Which of the following could be
represented by the value 500 in the function rule?
Answer:
C- The size of the initial water sample, in gallons.
Step-by-step explanation:
Which is a true statement based on the box plots below?
I WILL GIVE BRAINELY BECAUSE I NEED THIS DONE FAST BY TODAY
Question:
Which is a true statement based on the box plots below?
Answer:
It is C because the interquartile range is larger than the other one.
Hope This Helps :)
convert 6% to an equivalent decimal
Answer:
0.06
Step-by-step explanation:
You start driving north for 8 miles, turn right, and drive east for another 6 miles. At the end of driving, what is your straight line distance from your starting point?
Answer:
I think you are asking the total distance isn't? The straight line distance from your starting point 14 miles.I've added both miles to get the total distance
Step-by-step explanation:
please if I'm wrong or my answer doesn't match the with the answer's book tell me right away I try another method.
f(x) = x²+1
What is f(f(x))?
Answer:
f(f(x)) = x⁴ + 2x² + 2
Step-by-step explanation:
if f(x) = x² + 1, then f(f(x)) is equal to:
f(x)² + 1
= (x² + 1)² + 1
= x⁴ + 2x² + 1 + 1
= x⁴ + 2x² + 2
4) There are 4,200 beads in a box. There are 6 bags of beads in each box. If each bag has the same number of beads, how many beads are in each bag? * O 700 O 600 O 820 O 580
Answer:
700 beads are in each bag.
Step-by-step explanation:
Find the perimeter of the parallelogram shown.
7 yd
8 yd
5 yd
.
A26 yd
Answer:
It will be half of the original size.
HOPE I HELPED!
GIVE BRAINLIEST PLEASE!
Step-by-step explanation:
C=2πr
Diameter is 10
Question 6
Simplify the following expression.
-3 + 4a - 3b + 2) - 5(2-a + 3b)
The answer to the question
Answer:
I am pretty sure this is gonna be the 3rd anwser
Answer:
The answer is C aka 3(5)^6
Step-by-step explanation:
Help me please! Its really complicated
1. 4.5 cm
2. 25.13 inches
3. 78.54 cm
4. 13 cm. 6.5 +6.5
Radius is half the diameter
Step-by-step explanation:
1) Radius = Half of Diameter
[tex]r = \frac{1}{2} d \\ r = \frac{1}{2} \times 9 \\ = 4.5cm[/tex]
2) Given r = 4 in.
Circumference of Circle =
[tex]2\pi \: r \\ = 2\pi(4) \\ = 8\pi \: cm[/tex]
3) Given r = 5 in.
Area of Circle =
[tex]\pi {r}^{2} \\ = \pi {5}^{2} \\ = 25\pi {cm}^{2} [/tex]
4)Diameter = 2x Radius
[tex]d = 2r \\ = 2 \times 6.5 \\ = 13cm[/tex]
Note for questions 2 and 3 I will leave answers in terms of pi as the question did not specify to leave the answer as what. You can use your calculator to evaluate them if needed.
Plsss help mehh this is urgent
Find the length of segment WX.
6
15
25
10
Answer:
10
Step-by-step explanation:
15 / 6 = 2.5
25 ÷ 2.5 = 10
Please need help thank you
Answer:
12 miles
Step-by-step explanation:
Area=length*width
To find the length using the area, do area/width.
96/8=12
If John ran a 40 yard dash, how far did he run in decimeters?
Answer:
365.76 decimeters
Step-by-step explanation:
Please give me brainliest
Plssss helpppppp! 45 points!
Answer:
15 C
Step-by-step explanation:
C = 5/9( F - 32)
Let F = 59
C = 5/9( 59 -32)
Parentheses first
= 5/9( 27)
= 15
9 A right rectangular prism
What is the volume, in cubic meters, of the prism?
Answer:
D. 203
Step-by-step explanation:
volume= width X height X length
volume= 8 X 7 1/4 X 3 1/2
volume= 203
what is the answer to these questions?
A bag contains 7 blue, 4 yellow, and 9 purple marbles.
What is the probability of P(not blue) written as a fraction?
Answer:
13/20
Step-by-step explanation:
you count up all the marbles together, which is 20 and then count up all the other marbles besides blue, which would be 13 of the 20 marbles are not blue
Plss answer this will give brainliest 5 stars and a thx
IVE BEEN ASKING FOR 2 DAYS :( OVERDUE
Answer: -10
Step-by-step explanation:
A negative number divided by a positive number is always going to be negative
Answer:
-10
Step-by-step explanation:
Because a negative number divided by a positive number is a negative number.
Solve for x. Assume that lines which appear tangent are tangent.
Presumably, x is standing in for the question mark.
The pair of vertical angles (DFE and CFV) shown here both have measure 125°. This angle measure is equal to the average of the measures of the arcs intercepted by the chords CE and DV.
So we have
angle DFE = 1/2 (arc CV + arc DE)
125° = 1/2 (x + 200°)
250° = x + 200°
x = 50°
What percentage of 400=104 pls help me
Answer:
26%
Step-by-step explanation:
To find the percentage of a number, I find it's often helpful to first write it as a fraction: [tex]\frac{104}{400}[/tex] .
Percentages can be represented as a fraction by putting them over 100, eg. 25% is [tex]\frac{25}{100}[/tex]
.
Therefore, to get [tex]\frac{104}{400}[/tex] into a percentage, we need to change that 400 on the bottom to 100. How do we do that? Divide by four. However, anything we do to the bottom of a fraction, we must do to the top, so we divide both by four:
[tex]\frac{\frac{104}{4} }{\frac{400}{4} }[/tex] = [tex]\frac{26}{100}[/tex]
As we saw earlier, if a fraction has 100 at the bottom, then the top of the fraction is the percentage. So 104 is 26% of 400.
Which of the following is a sequence?
A 3, 6, 9, 18, ...
B 3, 6, 12, 18, ..
C 0.3, 0.7, 1.3, 1.5, ...
D 0.3, 0.6, 1.2, 2.4,
Answer:
The answer of this question is D
Step-by-step explanation:
Time 2
PLEASE HELP !!!! ILL GIVE BRAINLIEST !!!
Answer:
1) congruent
2) corresponding angles
3) 3x+21 = 6x-60
4) x =9
Step-by-step explanation:
1) congruent becuase supplementary means that these 2 angles add up to make 180 degrees.
2) the file below
3) we know they are equal because the congruent correspoding angles.
4) 3x+21 = 6x-60
=> 21 = 9x-60
=> 81 = 9x
=> 9 = x
There are 135 students going on a field trip. Each school bus holds 40 students. How many buses are needed?
Answer
4
Step-by-step explanation:
135/40=3.37 so 4 buses are needed
Answer:
4 busses are needed. Well 135 students going on a field trip and each bus holds 40 students. There can’t be “half” a bus but instead you can have a bus thats not all the way filled. Plus youc an’t duplicate or divide the a light of children so 4 busses.
Step-by-step explanation:
40x ≥ 135
Solve that and the answer has to be a whole number greater then the proposed decimal.
135/40= 3.375
3.375 and it can’t be rounded down and only up to the nearest whole digit so round it to 4.
4 busses.