Answer: She bought 68 books.
Step-by-step explanation:
Subtract 31 from 99 to find the difference! The difference tells us how many books she bought at the yard sale.
Evaluate (14 + x) = 2 when x = 4. A. 7 O B. 18 C. 11 D. 9
Answer:
14+4=18 have a good day Ahead
Also help plz! Tyyy
Answer:
A
Step-by-step explanation:
The area of a circle is pi*radius^2. The radius is 4.5 meters, 4.5^2 is 20~. 20~ *pi is 64~ m^2.
Robert painted 4/8 of each tile with green paint. He painted 52 tiles. What is the total amount of tiles that he painted green?
Please show an explanation to solve this problem. Thank you.
Answer:
The answer is 26
Step-by-step explanation:
All we do is multiply 4/8 by 52.
52 = 52/1
52/1 * 4/8 = 208/8
208/8 = 26
So the answer is 26.
Hope this helps! :)
Skyler getting a delivery from Chick-fil-A they charge $3 delivery fee plus $0.25 per mile write an equation to find the total cost y for a delivery that is X miles away
Answer:
y = 3 + 0.25x
Step-by-step explanation:
x represents the miles and if Skyler is charged $0.25 per mile, then x goes with the 0.25. The $3 is a flat fee and doesn't get added any more times then when it is first added.
It takes 43 facial muscles to frown. This is 26 more muscles
than it takes to smile. How many muscles does it take to
smile?
Answer:
17
Step-by-step explanation:
43 - 26 = 17
Answer:
43 - 26 = 17 muscles
A college football scout was interested in seeing if a football players height was a good predictor of how fast they were. He randomly sampled 15 different football players and recorded both their heights and their 40 yard dash times. For a person that was 6 ft 3 in tall, he computed a 99% confidence interval for mean speed to be (4.4, 4.8). Which of these options below is the best interpretation of this confidence interval?
a. It can be stated with 99% confidence that the mean speed for players who are 6 ft 3 in tall is between 4.4 and 4.8 seconds.
b. 99% of the time a player will run the 40 yard dash in between 4.4 and 48 seconds.
c. 99% of all players are 6ft 3in tall.
d. It can be stated with 99% confidence that out of the 15 football players sampled those who were oft 3in! tall averaged between 4.4 and 4.8 seconds in the 40 yard dash.
Answer:
a. It can be stated with 99% confidence that the mean speed for players who are 6 ft 3 in tall is between 4.4 and 4.8 seconds.
Step-by-step explanation:
x% confidence interval:
A confidence interval is built from a sample, has bounds a and b, and has a confidence level of x%. It means that we are x% confident that the population mean is between a and b.
For a person that was 6 ft 3 in tall, he computed a 99% confidence interval for mean speed to be (4.4, 4.8). Which of these options below is the best interpretation of this confidence interval?
The the entire population(all people with this height), we are 99% confident that the mean is in this interval, so option a.
pablos pizza makes a profit of $495 each day for 12 days, what is the profit for the 12 days
Answer:
5940
Step-by-step explanation:
495 x 12 = 5940
What is 24 divided by 849, be sure to show your work.
Answer:
0.02826855123 or 35.37
Step-by-step explanation:
24/849 = 0.02826855123
849/24 = 35.37
find x. :( i’ll mark brainlist and give thanks !
Answer:
tan15=x/300
0.267=x/300
0.267×300=x
x=80.01=80(approx)
which number line shows the solution to -2x+4>8?
Answer:
Can you provide a screenshot?
Step-by-step explanation:
It would be, x>-2
-2x+4>8
-2x>4
x>-2
Base your answer on Ali opened a savings account with $100. He saves $25 per month.
Solve an inequality to find the least number of months it will take Ali to have $700.
Answer:
24
Step-by-step explanation:
700- 100 = 600 divided by 25 = 24
Rewrite the expression by factoring out (x+3).
7x²(x + 3) + 5(x+3)
Answer:
(7x² + 5) ( x + 3)
Step-by-step explanation:
7x²(x + 3) + 5(x+3)
Factor out x + 3
(7x² + 5) ( x + 3)
7x³ + 21x² + 5x + 15
Factorize
7x²(x + 3) + 5(x + 3)
(7x² + 5) ( x + 3)
What is the area of this figure?
9514 1404 393
Answer:
54 square units
Step-by-step explanation:
One way to find the area is to divide the figure into 3 parts using a horizontal line at y=3.
The trapezoid below the line has bases 9 and 7, and height 6, so an area of ...
A = (1/2)(b1 +b2)h
A = (1/2)(9 +7)(6) = 48 . . . . square units
The left triangle above the line has a base of 3 and a height of 2, so an area of ...
A = (1/2)bh
A = (1/2)(3)(2) = 3 . . . . square units
The right triangle above the line has a base of 6 and a height of 1, so an area of ...
A = (1/2)(6)(1) = 3 . . . . square units
Then the total area is ...
figure area = trapezoid area + left triangle area + right triangle area
figure area = (48 + 3 + 3) square units = 54 square units
Need help ! (algebra)
Two parallel lines are cut by a transversal. Find the value of x
Answer:
x = 18
Step-by-step explanation:
you set the 2 equations equal to eachother
you minus x on both sides to get x on one side
than find the answer
What is the function of the seed? (What does it provide the embryo?)
Answer:
Seeds serve several functions for the plants that produce them. Key among these functions are nourishment of the embryo, dispersal to a new location, and dormancy during unfavourable conditions.
Step-by-step explanation:
Find the values of x and y so that the quadrilateral is a parallelogram.
3/10n = 4/5
What value of n will make this equation correct
A. 6/25
B. 3/8
C. 1/2
D. 8/3
Answer: B. 3/8
Step-by-step explanation:
3/10n=-4/5
We move all terms to the left:
3/10n-(-4/5)=0
Domain of the equation: 3/10=8
n=3
n!=8
n=R
We get rid of parentheses
3/10n+4/5= 3/8
Answer:
n= (4/5)(3/10)
n=4/5 * 10/3
n=8/3
n=2 2/3
Step-by-step explanation:
Please help need answer!
Answer: About 513 feet
A more accurate value is roughly 512.575960394824
==============================================================
Explanation:
With many trig problems, a diagram should help steer you in the right direction. See below.
The red angle is the angle of depression. It's formed by starting off looking straight horizontal, then we look down 26 degrees. The blue angle adds to the red angle to get 90, so we can see that 26+64 = 90. Or you could say 90-26 = 64.
The goal is to find the value of x, which is the length from B (the lighthouse base) to point C (the ship's location).
The lighthouse is 250 ft tall, meaning AB = 250
We'll use angle BAC, or angle A for short, as the reference angle. This is the blue angle in the diagram.
We have a known adjacent side (AB = 250) and an unknown opposite side (BC = x). We use a tangent ratio to tie these sides together with the reference angle in question. This way we can solve for x.
-------------------
tan(angle) = opposite/adjacent
tan(A) = BC/AB
tan(64) = x/250
250*tan(64) = x
x = 250*tan(64)
x = 512.575960394824
x = 513
The distance from B to C is roughly 513 feet.
I'm rounding to the nearest whole number because the other values given to you are whole numbers.
Enter the value of 3.4. (6 + 12).
Answer:
cool
Step-by-step explanation:
add the (6+12) and than multiply what you get by 3.4. you will get the answer
The value of the expression is 216.
What is a mathematical expression?
An expression, often known as a mathematical expression, is a finite collection of symbols that are well-formed in accordance with context-dependent principles. Quantities (operands), factors, operations, operations, braces, grammar, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's sequence of operations and other features. In algebra, a value may be designated by an expression; this value may rely on the values given to the variables that the expression contains. The semantics associated with the symbols in the expression determine this value. The expression's context determines which semantics to use. Depending on the suggested sequence of operations by the context, the identical syntactic statement 1 + 2 3 might have multiple values (mathematically 7, but also 9).
The given expression is 3.4.(6+12)
And it can be solved as
3.4.(6+12) = 12.18 = 216
Hence, the value of the above expression is 216.
To know more about expressions, click on the link
https://brainly.com/question/18189573
#SPJ2
find the image of ( 1 , 2 ) after a reflection about y = x followed by a reflection about y = - x
PLS ONLY ANSWER IF YOU KNOW THE ANSWER.
Answer:
(-1,-2)
Step-by-step explanation:
Think of the line y=x as a mirror. The image of the point (1,2) is obtained by drawing a line through (1,2) perpendicular to the line y=x and finding the point on the perpendicular line that is equal distance from the line y=x but on the other side. This gets you to the point (2,1).
Similarly, from (2,1) find the mirror image using the line y=-x as the mirror. You travel diagonally 1.5 diagonal squares to reach y=-x and then continue another 1.5 diagonals to reach (-1,-2) which is your answer.
Dale has set up his own business. He now needs funds to buy a new machine to cater to those consumers whose needs could not be met earlier due to lack of infrastructure and funds. Which stage is his business in?
A.
seed stage
B.
growth stage
C.
maturity stage
D.
decline stage
The correct answer is growth stage
Answer:
The answer is B
Step-by-step explanation:
The preceding two stages are development stage and startup stage. In growth stage one should first focus on fine tuning the business model and by finding ways for operational inefficiencies. Dale has actually already identified the inefficiency which is new machines and non being able to cater to some customers due to lack of machines. In this exact stage businessman try to grow the business by analyzing the main profit drivers and the finding ways to grow the profit driver with less cost
Use the diagram below to find x and each missing angle
Select the solution for the system of linear equations y = 3x + 4 and y = x + 2.
A.
(-1,1)
B.
(1,-1)
C.
(-1,-1)
D.
(1,1)
A manufacturer of cheese filled ravioli supplies a pizza restaurant chain. Based on data collected
from its automatic filling process, the amount of cheese inserted into the ravioli is normally distributed. To make sure that the automatic filling process is on target, quality control inspectors take a sample of 25 ravioli with mean weight of 15.26 grams and standard deviation of 2.56 grams. The margin of error (ME) to construct a 99% confidence interval for the true mean amount of cheese filling is
A) 2.064 B) 1.432 C) 3.745 D) 1.276 E) 1.797
b. A manufacturer of cheese filled ravioli supplies a pizza restaurant chain. Based on data collected
from its automatic filling process, the amount of cheese inserted into the ravioli is normally distributed. To make sure that the automatic filling process is on target, quality control inspectors take a sample of 25 ravioli and measure the weight of cheese filling. They find the 99% confidence interval of 14.16 to 15.84 grams. Which of the following is the correct interpretation?
I. We are 99% confident that the mean weight of cheese filling in all ravioli made by this process is between 14.16 and 15.84 grams.
II. 99% of all ravioli made by this process will have cheese filling weights between 14.16 and 15.84 grams.
III.We are 99% confident that the interval (14.16, 15.84) contains the mean weight of cheese filling in all ravioli made by this process.
IV. The weight of cheese filling in the ravioli is between 14.16 and 15.84 grams 99% of the time.
A) I only
B) III only
C)I and III.
D) II and III
E) I and IV
Answer: a. B) 1.432
b. E) I and IV
Step-by-step explanation:
a. Margin of error to construct a 99% confidence interval is calculated as
[tex]ME=t.\frac{s}{\sqrt{n}}[/tex]
where
t is the critical value expressed as t-score, which comes from t-distribution;
s is sample standard deviation
n is sample size
In this case, a t-score is used because the population standard deviation is unknown and the sample size is small, n < 30.
The way to find t-score is:
1) Define the degree of freedom, which is sample size minus 1: df = n - 1;
2) Compute alpha: [tex]\alpha=1-\frac{confidence}{100}[/tex];
3) Find the critical probability: [tex]p=1-\frac{\alpha}{2}[/tex]
With the df and critical probability, consulte the t-distribution table and find the score.
For the cheese filling:
df = 24
p = 0.995
t-score = 2.797
Calculating margin of error:
[tex]ME=2.797.\frac{2.56}{\sqrt{5}}[/tex]
ME = 1.432
The margin of error to construct a 99% confidence interval for the true mean amount of cheese filling is 1.432.
b. Confidence interval is an interval in which we have a percentage of certainty that the true population mean is. For example, with a 99% confidence interval of 14.16 to 15.84 grams, we are 99% confident that the true mean weight of cheese filling is between those numbers or that the weight of cheese filling is between 14.16 and 15.84 grams 99% of the time.
3. The Mathville Zoo only has tigers and
ostriches. The zoo keeper says they have 22
animals and the animals have a total of 70 feet.
Find the number of each kind of animal?
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Answer:
13 tigers9 ostrichesStep-by-step explanation:
Let t represent the number of tigers. Then the number of feet is ...
4t +2(22 -t) = 70
2t = 26 . . . . . . . . . subtract 44, collect terms
t = 13 . . . . . . . divide by 2; number of tigers
22 -t = 9 . . . . number of ostriches
The zoo has 13 tigers and 9 ostriches.
Can someone help me with this please?!
Answer:
D symmetric
Step-by-step explanation:
It can't be because they look like the rest
What is the fraction for 9 copies of 1/12
Answer:
9 x 1/12 = 4 1/2
PLZ HELP
Is it one solution, infinite solution or no solution (explain why)
3x+6 = -6 + 3x
Answer:
No solution
Step-by-step explanation:
3 x + 6 = − 6+ 3 x
Move all terms containing 'x ' to the left side of the equation.
'6 = − 6 ' Since '6 ≠ − 6' , there are no solutions.
What is the solution to the proportion
3y-8/12=y/5
The Answer is,
[tex]y = \frac{5}{21} [/tex]
And in decimal form it would be,
[tex]0.238095[/tex]
Step-by-step explanation:
The Answer is,
y = \frac{5}{21}y=
21
5
in decimal form it will be♤♤♤♤♤
0.2380950.238095