Answer:
Oooooo
Step-by-step explanation:
A chemist has 100 ml of 25% acid solution. how much of the solution does she need to drain and replace with 70% acid solution to obtain 100 ml of 60% acid solution?
Answer:
The proportion of acid at 70% that the chemist must use will be 77.8%, while the remaining 22.2% will be acid at 25%.
Step-by-step explanation:
Since the chemist has 100 ml of solution with 25% acid, and wants to obtain a solution of 60% acid by mixing the first with another 70% acid solution, to determine how much of each solution the chemical should use necessary to perform the following calculation:
70 x 1 + 25 x 0 = 70
70 x 0.9 + 25 x 0.1 = 65.5
70 x 0.8 + 25 x 0.2 = 61
70 x 0.7 + 25 x 0.3 = 56.5
Therefore, the proportion to be used is between 70% and 80% of acid at 70%, and 20% to 30% of acid at 25%.
70 x 0.75 + 25 x 0.25 = 58.75
70 x 0.76 + 25 x 0.24 = 59.2
70 x 0.77 + 25 x 0.23 = 59.65
70 x 0.78 + 25 x 0.22 = 60.1
Thus, the proportion should be between 77 and 78% of acid at 70% and 22 and 23% of acid at 25%.
70 x 0.778 + 25 x 0.222 = 60.01
Thus, finally, the proportion of acid at 70% that the chemist must use will be 77.8%, while the remaining 22.2% will be acid at 25%.
2y=2x+6
Solve for y
Answer:
y=x+3
Step-by-step explanation:
Answer:
y = x + 3
Step-by-step explanation:
Divide each term by 2 and simplify.
if Scott types 210 words in 5 minutes how many words can he type in a minute
Answer:
42
Step-by-step explanation:
210 divided by 5 is 42
question is in png pls some1 help.
Answer:
They r both 60°
Step-by-step explanation:
By the transversal lines law x=y
And by the parallelograms law x=60°
I hope I helped pls give me brainliest
Fine the values of x and y. Please explain .
nora has 3/4 as many books as victor. let v represent the number of books victor has. create an expression to represent the number of books nora has. create an expression to represent the number of books nora has
Answer:
N = [tex]\frac{3}{4}[/tex] * v
Step-by-step explanation:
Since the value that we are provided is a fraction that is tied to the number of books that Victor has, we would simply need to multiply this fraction by the total number of books that Victor has. This value is represented by the variable v while the total number of books that Nora has is represented by the variable N. Therefore, the expression would be the following
N = [tex]\frac{3}{4}[/tex] * v
PLS HELPPPPP!!!!!!!!!!!!!!!!!!
what is 2/5 times 11 in simplest form?
Answer:
4.4 would you let me know if you need an explanation and pls don't delete.
Hmmmm i think its 5/22
Step-by-step explanation:
So basically how i got it was 2/5*11
And that got me 5/22
I do not think you could simplify this
Either I'm very smooth brain or you can't simplify 5/22
HELP^^^ ITS 7TH GRADE MATH
Answer:
13
Step-by-step explanation:
count outside lines
Answer:
Perimeter: 13
20) Solve the problem. Suppose that 12 unique names are put into a hat and drawn at random without
replacement. How many different ways can you draw all of the names from the hat? Remember that
"without replacement" means that the names are not returned to the hat after they are chosen. Write your
answer in factorial notation.
SHOW WORK: None to be shown
A) 12!
B) 11!
C) 10!
D) 12! - 1
the answer would be A) 12 because there are only twelve names
The number of different ways is 12! you can draw all of the names from the hat without replacement option (A) 12! is correct.
What are permutation and combination?
A permutation is the number of different ways a set can be organized; order matters in permutations, but not in combinations.
It is given that:
Number of unique names = 12
That 12 unique names are put into a hat and drawn at random without
replacement.
"Without replacement" means that the names are not returned to the hat after they are chosen.
Number ways (without replacement) = 12x11x10x9x8x7x6x5x4x3x2x1
Number ways (without replacement) = 12!
Thus, the number of different ways is 12! you can draw all of the names from the hat without replacement option (A) 12! is correct.
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WILL GIVE BRAIANLEST PLZZZZ HELP MEEE 50 POINTS
Elevator 1 in an office building moved from ground position to a final position of +12 feet. Elevator 2 in the same building moved from ground to a final position of −15 feet. Which statement best describes the final positions of these two elevators? (5 points)
Question 4 options:
1)
Elevator 1 is 12 feet above ground level, and Elevator 2 is 15 feet below the position of Elevator 1.
2)
Elevator 1 is 12 feet below ground level, and Elevator 2 is 15 feet above the position of Elevator 1.
3)
Elevator 1 is 12 feet above ground level, and Elevator 2 is 15 feet below ground level.
4)
Elevator 1 is 12 feet below ground level, and Elevator 2 is 15 feet above ground level.
Answer: The answer would be option 3
Step-by-step explanation:
PLEASE HELP MEEEEE FASTTT
Answer:
-63
Step-by-step explanation:
PEMDAS stands for:
P -> Parentheses
E -> Exponents
M -> Multiplication (left to right)
D -> Division (left to right)
A -> Addition (left to right)
S -> Subtraction (left to right)
So in this problem, we can't evaluate the parentheses unless we evaluate the exponent first:
(-25+4^2)*7
(-25+16)*7
Next, we evaluate the parentheses by adding from left to right since there's no multiplication or division in the parentheses:
(-25+16)*7
(-9)*7
Lastly, we do multiplication:
(-9)*7
-63
Thus, our final answer is -63
i need the awnser ASAP plz!!
Answer:
it is D
Step-by-step explanation:
the ratio is 1.5 so multiply 15 by 1.5
Three apples (x) plus two
oranges (y) costs $16.
Five apples plus two
oranges costs $24. Hov
muon do each apples and
oranges cost?
9 out of 36 students wear glasses what percent of students wear glasses
Answer:
25%
Step-by-step explanation:
9 out of 36 is equal to 9/36, which equals 1/4.
1/4 is a quarter of a whole. a quarter is 25%
25%
9/36 = 1/4 = 0.25 = 25%
Find 4/5% of $75,000.
Answer:
60,000
Step-by-step explanation:
Answer:
3375
Step-by-step explanation:
Approximately how many times greater is 374,000 than 22,000?
Answer:
352,000
Step-by-step explanation:
Subtract 374,000 by 22,000 and you will get 352,000 as your answer
The number 374000 is greater then 22000 by exactly 25200 amount.
What is mathematic expression?
A mathematical expression is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.
Here, to find out by how much times the number 374000 is greater then the number 22000 we simply subtract the number 374000 by 22000 which comes out be 35200.
It should be noted that, To cross verify the answer we can add 35200 with 22000 it must be equal to 374000.
374000 - 22000 = 352000
Therefore, the number 374000 is greater then 22000 by exactly 25200 amount.
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1. Combine like terms in 2 + x + 3y + 4x + 2y + 5.
2. Combine like terms in 2x + 3xy + 4 + 5yx.
please due in 5 minutes please
Answer:
Detailed step by step solutions to your Combining like terms problems online with our math solver and calculator. Solved exercises of Combining like terms. Calculators Topics Solving Methods Go Premium. ... $-2+9y-4x-2y-3x$ 3. Combining like terms $9y$ and $-2y$ $-2+7y-4x-3x$ 4. Combining like terms $-4x$ and $-3x$ $-2+7y-7x$ Final Answer $-2 ...
Step-by-step explanation:
What is the probability that the highest level of education of an adult is a high school diploma, given that they have completed at least one of the education levels shown?
A. 0.04
B. 0.16
C. 0.47
D. 0.84
Answer:
Probability = 0.04 (Approx)
Step-by-step explanation:
Given:
High school diploma = 0.03
Total holder = 0.03+0.44+0.26+0.11 = 0.84
Find:
Probability
Computation:
Probability = 0.03 / 0.84
Probability = 0.0357
Probability = 0.04 (Approx)
Ricardo ran the 60-meter sprint in 5 seconds. Which best represents Ricardo’s rate in meters per second?
Answer:
1.8 or less
Step-by-step explanation:
girls 1.8 or less
Ricardo’s rate in meters per second is equivalent to 12 meters per second.
What is rate of change?Rate is defined as the rate of change of one variable with respect to other variable.{r} = dy/dx
In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.Mathematical symbols can designate numbers (constants), variables, operations, functions, brackets, punctuation, and grouping to help determine order of operations and other aspects of logical syntax.Given is that Ricardo ran the 60-meter sprint in 5 s.
Ricardo’s rate in meters per second
r = d/t
r = 60/5
r = 12
Therefore, Ricardo’s rate in meters per second is equivalent to 12 meters per second.
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The 6th grade took a field trip to the movies. The
table shows the price of popcorn based on the
quantity purchased. How much would it cost for
20 bags of popcorn?
Answer: 60
Step-by-step explanation:
Don't understand please help
Could someone help me on this math question !
What is the area in square feet 6.ft, 8ft
Answer:
48 Squared Feet
Step-by-step explanation:
6 * 8 = 48
Answer:
48ft2
Step-by-step explanation:
6ft x 8ft = 48ft2
Answer - 48ft2
Use synthetic division to determine f(-2) for the function f (x) = 9x^3 - 18x^2 - 16x + 32
Answer: -80
Step-by-step explanation:
What is the value of the expression when m=x+1?
A
3(x−4)
B
3(x−6)
C
3(x−5)+1
D
3(x+5)+1
Answer:
Its E im pretty sure 69
Step-by-step explanation:
nice
An airplane on autopilot took 9 hours to travel 6399 kilometers. What is the unit rate for kilometers per hour?
Answer:
6399/9=711 The answer to this question is 711.
Anyone know- I need help.
Answer: 5on x axis 2 on the y axis
Answer:
The answer would be (5,2)
:D Have a Great Day :D
select the correct answer
Answer:
b
Step-by-step explanation:
cause i say so.
heeeeeeeeeeeeellllllllllllpppppppppppppp please and thank you hehe :]
Answer:
Mean is 8 MAD is 4.29
Step-by-step explanation:
Really need help with this problem?
Answer:
6,400
Step-by-step explanation:
I finished I-Ready I dont do it anymore its easy