The local zoo contracts with one of the local veterinary clinics for pet checkups and sick visites. the zoo manager thought the vet made more then 375 visits to the zoo in one year, but the actual number was 412. what was the percent error between the actual number of visits and the number of visits the manager thought the vet made
math question down below
why can you use addition to check a subtraction
Nora and Eli are making homemade spring rolls for a party. Nora can make 8 spring rolls in 10 minutes. Eli can make 10 spring rolls in 12 minutes. If they each make 40 spring rolls, who will finish first? ******************************************************Can someone answer this for me please, it's 12 am and I have more work to do, help is very much appreciated**********************************************************
The person who will make 40 spring rolls the fastest is required.
Eli will finish first.
Nora
[tex]10\ \text{minutes}=8\ \text{spring rolls}[/tex]
[tex]1\ \text{spring roll}=\dfrac{10}{8}\ \text{minutes}[/tex]
[tex]40\ \text{spring rolls}=40\times \dfrac{10}{8}=50\ \text{minutes}[/tex]
Eli
[tex]12\ \text{minutes}=10\ \text{spring rolls}[/tex]
[tex]1\ \text{spring rolls}=\dfrac{12}{10}\ \text{minutes}[/tex]
[tex]40\ \text{spring rolls}=40\times \dfrac{12}{10}=48\ \text{minutes}[/tex]
Eli will finish first.
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The high temperature in Fairbanks, Alaska was 15.7 °F one day. That night, the temperature fell 38.4 degrees. What was the low temperature for the night?
Enter your answer as a decimal
Answer:
The low temperature for the night was of -22.7 °F.
Step-by-step explanation:
As the high temperature during the day was 15.7 degrees, but it fell 38.4 degrees in the night, in order to know which was that temperature we have to do the following calculation:
15.7 - 38.4: X (Temperature for the night)
-22.7: X
The low temperature for the night was of -22.7 °F.
Answer:
-22,7 i took the test
Step-by-step explanation:
From a group of 8 people, you randomly select 2 of them. What is the probability that they are the 2 oldest people in the group?
The probability of randomly selecting the 2 oldest people from the group of 8 is approximately 0.0357 or 3.57%.
What is probability?It is the chance of an event to occur from a total number of outcomes.
The formula for probability is given as:
Probability = Number of required events / Total number of outcomes.
Example:
The probability of getting a head in tossing a coin.
P(H) = 1/2
We have,
The total number of possible ways to select 2 people from a group of 8 is given by the combination formula:
C(8,2) = 8! / (2! x 6!) = 28
This means that there are 28 different pairs of people that can be selected from the group of 8.
To calculate the probability that the 2 oldest people are selected, we need to first determine how many ways there are to select these 2 people.
Since the order in which we select the people does not matter, we can simply choose any 2 people from the group of 8 in order to select the 2 oldest people.
There are C(8,2) = 28 ways to select any 2 people, and since there is only 1 pair that consists of the 2 oldest people, the number of ways to select the 2 oldest people is 1.
Now,
The probability of selecting the 2 oldest people is:
1/28 = 0.0357
Thus,
The probability of randomly selecting the 2 oldest people from the group of 8 is approximately 0.0357 or 3.57%.
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Final answer:
To find the probability of selecting the two oldest people from a group of 8, we calculate the number of ways to choose 2 people from 8 (28 ways) and understand that there is only 1 way to choose the two oldest. Thus, the probability is 1/28.
Explanation:
The question asks about the probability of selecting the two oldest people from a group of 8. To solve this, we can use the concept of combinations. There is only one way to pick the two oldest people. However, the total number of ways to pick 2 people out of 8 is calculated using combinations, which can be represented as 8 choose 2 or 8C2. The formula for combinations is nCk = n! / (k!(n-k)!), where n is the total number of items, and k is the number of items to choose.
Applying this formula, the total number of ways to choose 2 people from 8 is :
8C2 = 8! / (2!(8-2)!) = 28
Therefore, the probability that the two people selected are the oldest is :
Probability = 1 / 28
I have 3 countries (Germany, usa, China) with 3 statistics (people per square km, internet users per 100 people, cell phone owners per 100 people).
What I don't get: use mathematical strategies I.e. Ratios to help compare countries.
How do I do that. Please help!
estimate each product. tell whether the estimate is greater than or less than the actual product. $224×12= 372×36= 488×85= 515×41=
What is the answer -x -13 = 35
The area of a rectangle is x^2-2x-15 and the length of the rectangle is x+3
a. find the width of the rectangle
I figured this one out, it's x-5. Just to help you guys out.
b. find the area of the rectangle if the width is 6 feet.
Simon wanted to find the equation of a line that passes through (–6, 5) and is perpendicular to the graph of 3x + 2y = –11. His work is shown below.
1. 3x + 2y = –11 written in slope-intercept form is y = x , so the slope is .
2. The slope of the perpendicular line is .
3. Substitute the point and the new slope into point-slope form to get y – 5 = (x – (–6)).
4. Simplifying, the line is y – 5 = (x + 6)
"3x + 2y = –11 written in slope-intercept form is y = x." Not so.
To find the slope of this line, solve for y:
2y = -3x - 11 => y = (-3/2)x - 11/2. The slope of the given line is -3/2. The
graph of the new (perpendicular) line will then be the negative reciprocal of -3/2, or +2/3.
Now use the point-slope formula for the equation of a straight line to determine the equation of this new (perpendicular) line thru (-6,5):
y-5 = (2/3)(x+6) (answer)
To find the equation of a line perpendicular to a given line, we need to find the negative reciprocal of the slope of the given line. Using the point-slope form, we can substitute the point and the new slope to get the equation of the perpendicular line.
Explanation:1. To write the given equation in slope-intercept form, we need to solve for y. Rearranging the equation, we have 2y = -3x - 11, y = (-3/2)x - 11/2. Therefore, the slope of the given line is -3/2.
2. The slope of a line perpendicular to another line is the negative reciprocal of the slope of the given line. So, the slope of the perpendicular line is 2/3.
3. Using the point-slope form, we substitute the point (-6, 5) and the new slope (2/3) into the equation y - y1 = m(x - x1), where x1 and y1 are the coordinates of the given point. Plugging in the values, we get y - 5 = (2/3)(x + 6).
4. Simplifying the equation, we can distribute 2/3 to x and 6, which gives us y - 5 = (2/3)x + 4. Adding 5 to both sides, the final equation of the line passing through (-6, 5) and perpendicular to 3x + 2y = -11 is y = (2/3)x + 9.
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There are 44 books per shelf and there are 8 shelves 1/4 of these books are novels.How many novels will there be??
There will be 88 novels among the total of 352 books.
To find the number of novels, we can use the information that 1/4 of the books are novels.
First, we calculate the total number of books:
Total number of books = 44 books/shelf * 8 shelves
= 352 books
Then, we can find the number of novels:
Number of novels = 1/4 * 352 books
= 88 books
Therefore, there will be 88 novels.
What is the value of 11−3m , when m = 2?
5
6
10
12
Sheryl has a basket of ripe apples and peaches. The number of apples in the basket is 12 more than twice the number of peaches. If there are 36 apples in the basket, there are __ peaches in the basket
A rectangular floor is 24 feet long and 9 feet wide. What is the area of the floor in square yards?
Simplify 8(x - 4).
8x - 4
x - 32
8x - 32
x - 4
There are 9 counters in a bag.
7 of the counters are green.
2 of the counters are blue.
Ria takes a random two counters from the bag.
Work out the probability that Ria takes one counter of each colour.
You must show your working.
Jesse wants to save the same amount of money each week for a trip. He needs $3,060. If the trip is 36 weeks away how much money should Jesse save each week?
The crab nebula is a cloud of gas and dust particles in space that is expanding at a rate of 930 miles per second. What is its rate of expansion in miles per hour?
A student found the slope of a line that passes through the points (-8, -6) and (2, -3) to be 3/10.
What mistake did she make?
A - She calculated the run over the rise.
B - She forgot the negative sign.
C - She used the negative reciprocal of the slope.
D - She did not make a mistake. That is the correct slope.
Answer:
Its C, edge 2021
Step-by-step explanation:
No, she did not substitute the correct x and y values.
Which ordered pair is the solution to the system of equations? {−3x+4y=−20{,y=x−4 A.(−4, −8) .B.(−2, −6) C.(4, 8) D.(0, −5)
The solution of the given system of equations is (-4, -8).
Therefore, option A is correct.
Given equations are,
[tex]-3x+4y=-20..........(1)\\\\y=x-4 .........(2)[/tex]
Substituting the value of equation 2 in equation 1.
[tex]-3x+4(x-4)=-20\\\\-3x+4x-16=-20\\\\x=-20+16=-4[/tex]
Substituting the value of x in equation 2
We get, [tex]y=-4-4=-8[/tex]
The solution is (-4, -8)
Therefore, option A is correct.
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Imagine two lines intersect. How can the properties of linear pairs and vertical angles help to determine the angle measures created by the intersecting lines? Explain.
If you know the measure of one angle in a linear pair, you can find the measure of the other because the sum of the measure of the two angles is 180 degrees. If you know the measure of one angle in a pair of vertical angles, you can find the measure of the other because they are congruent.
When two lines intersect, they create angles. The properties of linear pairs and vertical angles can be used to determine these angles' measures. Linear pairs are two adjacent angles totaling 180 degrees, and vertical angles are opposite each other and are always equal.
Explanation:When
two lines intersect
, they create four angles. In this formation, a couple of properties can help to determine the angle measures. The first is the concept of a
linear pair
. This is when two angles formed by intersecting lines add up to 180 degrees and are adjacent to each other. This can help when calculating one of the angle's measure if the other is known. Then, there's the principle of
vertical angles
, which are the angles across from each other when two lines intersect. Vertical angles are always equal. So if you know the measurement of one angle, you know the measurement of the angle directly across from it.
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Eleanor can drive an average of 374 miles on one tank of gas. How many miles can she drive on 15 tanks of gas?
What is the perimeter of a triangle with sides of lengths 5, 8, & x?
13 + x
40 + x
40x
21
What graph represents the inequality y≥2−2x?
The graph for the inequality y ≥ 2 - 2x is a downward sloping line with a y-intercept of 2. The area above this line, including the line itself, is shaded to denote the solutions for the inequality.
Explanation:The equation y ≥ 2 - 2x is a linear inequality with a slope of -2 and a y-intercept of 2. It is represented graphically as a straight line where y is equal to or larger than 2 - 2x. As the coefficient of x is negative, the line will slope downwards towards the right based on the rule mentioned in Figure 12.4 (c).
In a two-dimensional (x-y) graph, x represents the independent variable while y is the dependent variable. Thus, for every increase of 1 unit on the x-axis (horizontally), the value of y decreases by 2 units (vertically) due to the slope of -2.
Since y is greater than or equal to 2 - 2x, the area above the line (including the line itself as it's a 'greater than or equal to' inequality) will be shaded when the inequality is graphed. This shading means that any point within this area is a solution to the inequality.
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24 students in a class took an algebra test. If 18 students passed the test, what percent do not pass? Question 7 options: A) 6% B) 75% C) 18% D) 25%
The percentage of students that do not pass will be 25%. Then the correct option is D.
What is the percentage?The amount of any product is given as though it was a proportion of a hundred. The ratio can be expressed as a quarter of 100. The phrase % translates to one hundred percent. It is symbolized by the character '%'.
The percentage is given as,
Percentage (P) = [Final value - Initial value] / Initial value x 100
24 students in a class took an algebra test. If 18 students passed the test.
Then the percentage of the students that do not pass will be given as,
P = [(24 - 18) / 24] x 100
P = (6 / 24) x 100
P = 0.25 x 100
P = 25%
The percentage of students that do not pass will be 25%. Then the correct option is D.
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Express the indicated degree of likelihood as a probability value. "It will definitely get dark tonight."
The indicated degree of likelihood as a probability value. "It will definitely get dark tonight." is:
1
Step-by-step explanation:We know that in general the indicated degree of likelihood as a probability value lie between 0 and 1.
Also, we get 0 when we are sure that the event will never occur and so it has a probability 0.( For example-- The event of getting 7 when rolling a six-number cube.
As we know that the possible outcome on rolling a six-sided die is:
{1,2,3,4,5,6}
Hence P(getting 7)=0
( as none of the outcome is 7) )
Also, we get the value as 1 when the outcome is certain i.e. the vent will definitely happen.( i.e. P( getting a head or a tail on tossing a coin)=1
( since there are just two outcomes on tossing a coin i.e. head and tail will come up )
Here we have a outcome as:
"It will definitely get dark tonight."
It is a obvious event that it gets dark at night there is no other possibility.
Hence, the answer is:
1
Explain how we use a tree diagram to determine the probability of an events
Tree diagrams are a helpful tool for calcuating probabilities when there are several independent events involved. They get their name because these types of diagrams resemble the shape of a tree. The branches of a tree split off from one another, which then in turn have smaller branches. Just like a tree, tree diagrams branch out and can become quite intricate.
the number below follow a pattern
300 30 3 0.3
part a answer is 0.03 0.003
part b
what is the relationship between the terms in the pattern?
Answer:
Part a) the next two numbers of the sequence is 0.03, 0.003
part b)
We get each successive terms, we get previous term divided by 10.
2nd term = 1st term ÷ 10
3rd term = 2nd term ÷ 10
4th term = 3rd term ÷ 10
Step-by-step explanation:
The given number are 300, 30, 3, 0.3
You can see that the previous number divided by 10 to get the next number.
So the next two numbers are
0.3 ÷ 10 = 0.03
0.03 ÷10 = 0.003
Part a) the next two numbers of the sequence is 0.03, 0.003
Part b.
We get each successive terms, we get previous term divided by 10.
2nd term = 1st term ÷ 10
3rd term = 2nd term ÷ 10
4th term = 3rd term ÷ 10
Refer to the spinner. Find the odds of the spinner landing on a dark section.