The cost per ounce is 12.5.
Given that,
70 oz of dried cranberries cost $5.60
We have to determine,
What is the cost per ounce?
According to the question,
To determine the cost per ounce calculation must be done in a single unit, following all the steps given below.
The cost per ounce is,
70 oz of dried cranberries cost $5.60,
Hence, The cost per ounce is 12.5.
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Answer:
30 of them were students
17 were adults
Step-by-step explanation:
bunny and rabbit problems
if they were all adults
7 x 47 = 329
329 - 269 = 60
60/ (7-5) = 30
30 of them were students
17 were adults
y=x+3
y=2x+5
a. 7a-2b = 5a b
For this case we have the following expression:
From here, we must clear the value of a.
We then have the following steps:
Place the terms that depend on a on the same side of the equation:
Do common factor "a":
Clear the value of "a" by dividing the factor within the parenthesis:
Answer:
The clear expression for "a" is given by:
Answer: The required value of a is
Step-by-step explanation: We are given to solve the following equation for the value of a:
Since there are two unknowns and only one equation , so the value of a will definitely contain the value of b.
The solution of equation (i) for a is as follows:
Thus, the required value of a is
if (x,y) is a solution to the system of equations above, what is the value of x-y?
A)-20
B)-8
C)-4
D)8
can you show your work please
Answer:
Step-by-step explanation:
The given system of equations :
Multiply equation (1) with 3 and equation (2) with 2 , we get
Now subtract equation (4) from equation (3), we get
Substitute the value of y in equation (1), we get
Hence, the solution of the system : (x,y)=(2,6)
Now, consider and substitute the value of x and y , we get
The solution to the equation is x - y = -4
Given data ,
To solve the system of equations, we can use the method of substitution or elimination. Let's use the method of elimination:
Multiply the first equation by 3 and the second equation by 2 to make the coefficients of x in both equations equal:
(3)(2x-3y) = (3)(-14)
(2)(3x-2y) = (2)(-6)
Simplifying these equations gives:
6x-9y = -42
6x-4y = -12
Now, subtract the second equation from the first equation:
(6x-9y) - (6x-4y) = (-42) - (-12)
-5y = -30
Divide both sides by -5:
y = 6
Substitute this value of y back into one of the original equations, let's use the first equation:
2x - 3(6) = -14
2x - 18 = -14
2x = 4
x = 2
Now , the value of x - y is given by
A = x - y
A = 2 - 6
A = -4
Hence , the equation is solved
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2. What is SD(Y), the standard deviation of the daily high temperature in Montreal during April in degrees Fahrenheit?
Answer:
1. E(Y) = 50.54°F
2. SD(Y) = 11.34°F
Step-by-step explanation:
We are given that The daily high temperature X in degrees Celsius in Montreal during April has expected value E(X) = 10.3°C with a standard deviation SD(X) = 3.5°C.
The conversion of X into degrees Fahrenheit Y is Y = (9/5)X + 32.
(1) Y = (9/5)X + 32
E(Y) = E((9/5)X + 32) = E((9/5)X) + E(32)
= (9/5) * E(X) + 32 { expectation of constant is constant}
= (9/5) * 10.3 + 32 = 50.54
Therefore, E(Y), the expected daily high in Montreal during April in degrees Fahrenheit is 50.54°F .
(2) Y = (9/5)X + 32
SD(Y) = SD((9/5)X + 32) = SD((9/5)X) + SD(32)
= * SD(X) + 0 { standard deviation of constant is zero}
= * 3.5 = 11.34°F
Therefore, SD(Y), the standard deviation of the daily high temperature in Montreal during April in degrees Fahrenheit is 11.34°F .
Answer: 18 pine trees / 12 elm trees
Step-by-step explanation:
To meet the requirement of at least 16 but no more than 30 trees with a 3:2 ratio of elm to pine trees, we can choose:
Elm Trees: 3x
Pine Trees: 2x
Where x is a positive integer. To stay within the given constraints:
3x + 2x ≥ 16 (at least 16 trees)
5x ≥ 16
x ≥ 16/5
x ≥ 3.2
We need to find the largest integer value for x while staying below 30 (no more than 30 trees). Since x must be an integer, the largest valid value for x is 6 (as 7 would exceed 30).
So, for the example:
Elm Trees = 3x = 3 * 6 = 18
Pine Trees = 2x = 2 * 6 = 12
In this case, there would be 18 elm trees and 12 pine trees, totaling 30 trees, which falls within the range of at least 16 but no more than 30 trees and maintains the 3:2 ratio of elm to pine trees.