Answer:
n = 12, q = 9
Step-by-step explanation:
The simultaneous equation that represents the expression is;
n + q = 21 .......... 1
0.05n + 0.25q = 2.85 ........ 2
Multiply equation 2 by 100 to have;
5n + 25q = 285
n + 5q = 57
____________________________________
n + 5q = 57
n + q = 21
Substract the resulting equations
5q-q = 57-21
4q = 36
q = 36/4
q = 9
Substitute q = 9 into eqn 1;
From 1; n+q = 21
n = 21-q
n = 21-9
n = 12
Hence she has 12 nickels and 9 quarters
Harry needs 21 square meters for every 6 wizard cloaks he makes
Answer:
Harry needs 21 square meters of fabric for every 6 wizard cloaks he makes then Equal ratios = 21/6 = 7/2 = 14/4. Step-by-step explanation: Complete Question is : Complete the table using equivalent ratios.
Step-by-step explanation:
5.)
A ball is thrown into the air with an initial velocity of 96 feet per second. Given the formula below wheret,
represents time in seconds and s(t), the height of the ball, when will the ball hit the ground?
s(t) = -16t? + 960
Show full work
Answer: The ball will hit the ground 6 seconds after it has ben thrown, at t = 6s.
Step-by-step explanation:
The equation for the height of the ball should be:
s(t) = (-16ft/s^2)*t^2 + 96ft/s*t
When s(t) = 0ft, means that the ball is in the ground
This represents the height of the ball as a function of t, the time in seconds.
We can see that at t = 0s:
s(0s) = (-16ft/s^2)*(0s)^2 + 96ft/s*(0s) = 0ft
Then at the time 0 seconds, the ball is in the ground, so we must look at the other root of the equation
(-16ft/s^2)*t^2 + 96ft/s*t = 0ft
To find it, we can use the Bhaskara equation, in this case is:
[tex]t = \frac{-96ft/s +- \sqrt{(96ft/s)^2 - 4*(-16ft/s^2)*0} }{-2*16ft/s^2} = \frac{-96ft/s^2 +-96ft/s^2}{-32ft/s^2}[/tex]
Then we have the two solutions:
t = (-96ft/s + 96ft/s)/(-32 ft/s^2) = 0s (the one that we already found)
And the other one is:
t = (-96ft/s - 96ft/s)/(-32ft/s^2) = 6s
Then:
s(6s) = 0ft
This means that the ball will hit the ground at t = 6 seconds.
The time required to hit the ground is required.
The time taken by the ball to reach the ground is 2.45 seconds.
The equation is
[tex]s(t)=-16t^2+96[/tex]
At the ground [tex]t=0[/tex]
so,
[tex]0=-16t^2+96\\\Rightarrow 16t^2=96\\\Rightarrow t=\sqrt{\dfrac{96}{16}}\\\Rightarrow t=2.45\ \text{s}[/tex]
The time taken by the ball to reach the ground is 2.45 seconds.
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Mr. G drove a total of 252 miles and used 42
used dia
gallons of gas last weekend. What is the unit
rate of miles to 1 gallon?
R
Answer: 890
Step-by-step explanation:
Hey, I need help in this one.
Answer:
false
Step-by-step explanation:
its false cuz its 3x bigger
2*3=6
4*3=12
hope dis helps
might be wrong buh wutever
ion care if u report it
Consider the following equations: y = x minus 2. y = 2 x minus 2. y = negative x minus 2. y = negative 2. Discuss the similarities and difference in the graphs of these equations. (Use a graphing calculator if needed.) a. Same slopes; different y-intercepts b. Same slopes; same y-intercepts c. Different slopes; same y-intercepts d. Different slopes; different y-intercepts
the answer would be C.
Explanation:I got it correct
Answer: c Different slopes; different y-intercepts
Step-by-step explanation:
hey I am working on identify slope and intercept
Answer:
hey hows ur day
Step-by-step explanation:
mins good
Answer:
Ok, so slope is basically the steepness of the line, and intercept is when it crosses the x or y axis.
Step-by-step explanation:
To identify the slope, find two points on the line, then use this equation to find the slope: [tex]\frac{y2 - y1}{x2 - x1}[/tex], where x1 and y1 are the coordinates of the first point on the line, and x2 and y2 are the coordinates of the second point on the line. y2 - y1 is called the rise, and x2 - x1 is called the run. Then, to find the intercept (commonly the y-intercept), you must find the point at which the line crosses the axis. This is the easiest part because you just need to find a point on the axis. When you need to find the y-intercept, look for where the line crosses the x-axis, and when you need to find the x-intercept, look for where the line crosses the y-axis.
The points (3,-2) and (2,1) are both solutions to which inequality
Ms. Chibbaro packs 6 almonds for every 3 craisins (cranberry raisins) in her snack pack. She has 12 more almonds than craisins.
On a photograph an ant is enlarged at a scale 25:1. In the photo, the ant's leg is 15 cm. What is the actual length of the ant's leg?
Answer:
3/5cm
Step-by-step explanation:
Let's solve your equation step-by-step.
x(25)=15
Step 1: Simplify both sides of the equation.
25x=15
Step 2: Divide both sides by 25.
25x /25 = 15/25
x = 3/5
Actual length of ant's leg is 0.6cm
Let the actual length of ant's leg = a
Scale = 25 : 1
Length in photo = 15 cm
Express as a an equation :
25 × actual length = 1 × length in photo
25a = 15
a = 15 / 25
a = 0.6
Hence, actual length of ant's leg is 0.6cm
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What percentage of the guesst at this hotel called for room service yesterday?
Answer:
Step-by-step explanation:
Identify the following as an identity, a contradiction, or a conditional equation.
3(x + 2) = 3x + 2
(iv) -3/-11 + 5/9 step explanation
Answer:
82/99Step-by-step explanation:
-3/-11 + 5/9 =Two negatives cancel
3/11 + 5/9 =LCM of 9 and 11 is 99, bringing into common denominator of 99
3*9/11*9 + 5*11/9*11 =27/99 + 55/99 = 82/99HELP!! Determine whether the pair of lines are parallel, perpendicular, or neither. 8x=3y+2 -16x+6y=2.
Answer:
24x - 9y=0
Step-by-step explanation:
8x=3y+2-16x+6y=2
8x=9y+2-16x=2
8x+16-9y=2-2
24x-9y=0
Find the area of the Compound shape
The answer is 108 m^2 and 27 cm^2
I just need the steps....
Answer:
Step-by-step explanation:
6² + 12 × 6 = 36 + 72 = 108 m²
[tex]\frac{3*6}{2}[/tex] + 6 × 3 = 9 + 18 = 27 cm²
Answer:
108
Step-by-step explanation:
FREE ANSWERS PEEPSSSSSSSSSSSSSSSSSSSSSSSSSS
Answer:
Ok
Step-by-step explanation:
Answer:
US basketball legend Kobe Bryant and his daughter Gianna were among nine people killed in a helicopter crash in the city of Calabasas, California. Bryant, 41, and Gianna, 13, were travelling in a private helicopter when it came down and burst into flames. The LA county sheriff said there were no survivors.
Suppose that 2 were subtracted from each of the values in a data set that
originally had a standard deviation of 7.5. What would be the standard
deviation of the resulting data?
A. 2
B. 7.5
C. 9.5
O D. 5.5
Answer:
Option B. 7.5 is the correct answer
Step-by-step explanation:
Let us define standard deviation first.
Standard deviation is the square root of variance. Standard Deviation tells us that how far are the values in a data set from the mean.
Now, if a constant is subtracted from all values of a dataset, the standard deviation remains the same. Only the origin or mean of the data changes by subtracting a constant from whole data set.
Given that the standard deviation of dataset is 7.5
Subtracting 2 from each value of dataset will not change the standard deviation as 2 is a constant.
Hence,
Option B. 7.5 is the correct answer
Answer:
7.5 it stays the same
Step-by-step explanation:
write an equation for the graph using point-slope form
Answer: y-6=5/6(x-4)
Step-by-step explanation:
using the 2 points to find the slope (-2,1) and (4,6):
(6-1)(4--2)=5/6
y-6=5/6(x-4)
You are going on a hike with 3 other people. You decide to divide the bottles of water evenly among the group. Write an expression to find the number of bottles each person will carry. Find the total number of bottles each person will carry if there are 16 bottles.
Compare. Select <,>, or=.
8.465? V 8.445
Answer:
8.465>8.445
Step-by-step explanation:
8.465>8.445
So 8.465 is greater than 8.445
Which equation has a solution of 54.73 for n?
n +8 = 62.73
n - 8 = 62.73
62.73 + 8 = n
8-46.73 = n
Answer:
n + 8 = 62.73
the first one
Step-by-step explanation:
The total number of students enrolled at Twin Rivers Middle School is 2,000
students. If the ratio of boys to girls is also 3 to 2 for the school, how many students
are boys and how many students are girls at Twin Rivers Middle school?
Answer:
1200 boys and 800 girls
Step-by-step explanation:
since the ratio is 3:2 i just added the ratio to get 5 then divided that by how many total students there were giving me 400, then multiplied it by 3 for the boys and by 2 for the girls. giving me 1200 and 800
(sorry if this is confusing)
Add the ratios together: 3 + 2 = 5
Divide total students by 5:
2000 / 5 = 400
Multiply each ratio by 400:
Boys = 400 x 3 = 1200
Girls = 400 x 2 = 800
George bought 2.5 pounds of each type of fruit shown on the sign what was the total cost of the fruit he bought
Answer:
it would be $2
Step-by-step explanation:
please help
what is the solution to the equation below?
34x + 95 = 3 (14x + 9)
Answer:
x=8+1/2
Step-by-step explanation:
Hope this helps, good luck!
Answer:
x=7/2=8.500
Step-by-step explanation:
SURVEYS Alana surveyed several students to find the number of hours of sleep they typically get each night. The results are shown in the table. Make a bar graph of the data.
Answer:
You have to make a bar graph that shows the hours of sleep each student gets. Sharla gets the most sleep and Kate gets the least.
Step-by-step explanation:
Explanantion is in answer.
I know it's sloppy but here's mine!
the mass of a rock same is 25 g and its density is d5d/cm cubed. What is the volume of the rock?
Answer:
וודי מסיפור הצעצועים יזיין אותך בלילה
Step-by-step explanation:
The Ted Williams Tunnel under Boston Harbor is 8,448 feet long. How many yards is the length of the tunnel?
Answer:
2816 yards
Step-by-step explanation:
In order to find the answer, you would need to divide 8,448 by 3 because there are 3 feets in a yard.
Hope this helps and pls do mark me brainliest if you can:)
any help will be helpful and you have to make ur own graph paper if you don't have none he said but please help I don't understand
Step-by-step explanation:
do you need graph paper?
just minus the 2nd cordnates x to the 1dt cordnates x and same for the y. that will give you the distance for each x and y points
I will give branliest to the first person to answer!
Simplify the following expressions
Please include the work its greatly appriciated!
1. 8x - 5 + 2x
2. 2.5w - 3y + 4w
3. 3(5 - 2n) + 9n
4. 5/7x + 15 = 9/14x - 9
Answer:
1: 10x-5
2: 6.5w-3y
3: 15+3n
4: not sure
what does the power of 10 Mean
Answer:
[tex]x^{10}[/tex]
Step-by-step explanation:
for example, if the variable x stands for 2, [tex]2^{10}[/tex] stands for 2*2*2*2*2*2*2*2*2*2
An employee of an auction house has a list of 25 recently sold paintings. Eight artists were represented in these sales. The sale price of each painting is on the list. Would the correlation coefficient be an appropriate way to summarize the relationship between artist (x) and sale price (y)? Why or why not?
Answer:
Step-by-step explanation:
Given that:
A list of 25 recently sold paintings in an auction house is available, and eight artists were represented in the sales.
The objective is to determine if the correlation coefficient would be an appropriate way to summarize the relationship between the artist (x) and sale price (y).
From the information given;
NO, The correlation coefficient would not be an appropriate way to summarize the relationship between artist (x) and sale price (y).
The reason is being that since variable (x) is the artist and which is regarded as the categorical variable even though it is attributed to numerical values, it cannot and will not be used in quantitative studies like correlation.