Let x be the amount of 90% solution you will use.
You have 350 mL of a 15% alcohol solution, so it contains 0.15 • 350 mL = 52.5 mL.
For each mL of the 90% solution that you use, you would add 0.9 mL of alcohol. So in the new mixture, the volume would be (350 + x) mL, and its concentration needs to be 40% so that
((52.5 + 0.9x) mL) / ((350 + x) mL) = 0.4
Solve for x :
(52.5 + 0.9x) / (350 + x) = 0.4
(52.5 + 0.9x) / 0.4 = 350 + x
131.25 + 2.25x = 350 + x
1.25x = 218.75
x = 175
so you will need to use 175 mL of the 90% solution.
What is the value of x in f(x)=x/3-1/6,when f(x)=0.5
Verbal contracts are generally discouraged because
a. there are usually no witnesses to a verbal contract
b. without a physical signature, they can be very difficult to enforce
C.unlike in a written contract, people can easily lie in a verbal contract
d. verbal contracts usually lack the detail necessary to produce a formal contract
Answer:
B: Without a physical signature, they can be very difficult to enforce
Step-by-step explanation:
Edge 12/7/2020
Generally, verbal contracts are often discouraged because: B. it is difficult to enforce without a physical signature.
What is a Verbal Contract?verbal contract, which can also be referred to as a parol contact, is a contract that is expressed by just words of promise or historically, and can be recognized by the courts.
However, unlike written contracts that a signature must be appended to, verbal contract are generally discouraged because: B. it is difficult to enforce without a physical signature.
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Someone help please
Wanda's homework was to find 73% of $400
A tape diagram. 0 dollars is 0 percent. Question mark dollars is 73 percent. 400 dollars is 100 percent. (7.3) (400) = 2,920. 73 percent of 400 dollars is 2,920 dollars.
What error did Wanda make?
O None. Wanda’s work is correct.
O Wanda converted the percent to a decimal incorrectly. It should be 0.073.
O Wanda converted the percent to a decimal incorrectly. It should be 0.73.
O Wanda has the wrong label. It should be hours, not dollars.
btw im asking these questions for people who doesnt have these questions
Answer: C because she went back to im just trying to help the team out
Answer:
(C) wanda converted the percent to a decimal incorrectly. it should be 0.73.
I answer (C) and it was correct.
Step-by-step explanation:
Give the other person brainliest ↑↑
hope it helps
Are y = -5x + 2 and y = 5x – 3 parallel, perpendicular or neither?
A.Parallel
B.Perpendicular
C.Neither
Answer:
parallel is the answer
How many is (+5) --(692)+1/3%
Answer:
730.3
Step-by-step explanation:
hope this helps.
help please asap lol
Answer:
The measure of angle F is 78°.
] Find the vector form of the general solution to the given linear system Ax = b. Then use that result to find the vector form of the general solution to Ax = 0.
This question is incomplete, the complete question is;
Find the vector form of the general solution to the given linear system Ax = b; Then use that result to find the vector form of the general solution to Ax = 0.
x1 + x2 + 2x3 = 5
x1 + x3 = -2
2x1 + x2 + 3x3 = 3
Answer:
the vector form of the general solution to the given linear system Ax = b
x1 -2 -1
x2 = 7 +s -1
x3 0 1
find the vector form of the general solution to Ax = 0.
x1 -1
x2 = s -1
x3 1
Step-by-step explanation:
Given that;
x1 + x2 + 2x3 = 5
x1 + x3 = -2
2x1 + x2 + 3x3 = 3
Augmented matrix is expressed as;
1 1 2 5
1 0 3 -2
2 1 3 3
R2 ← R2 - R1
1 1 2 5
0 -1 -1 -7
2 1 3 3
R3 ← R3 - 2R1
1 1 2 5
0 -1 -1 -7
0 -1 -1 -7
R3 ← R3 - R2
1 1 2 5
0 -1 -1 -7
0 0 0 0
R1 ← R1 + R2
1 0 1 -2
0 -1 -1 -7
0 0 0 0
R2 ← - R2
1 0 1 -2
0 1 1 7
0 0 0 0
SO from the above reduced matrix, we get
x1 = -2 - x3
x2 = 7 - x3
x3 = x3
now we introduce parameter "s" for free variable x3
x1 = -2 - s
x2 = 7 - s
x3 = s
x1 -2 -1
x2 = 7 +s -1
x3 0 1
General solution of Ax = 0 will be
x1 -1
x2 = s -1
x3 1
Ned took a test with 25 questions. He lost 4 points for each of the 6 questions he got wrong and earned an additional 10 points for answering a bonus question correctly. How many points did Ned receive or lose overall?
Answer:
Ned lost 14 points.
Step-by-step explanation:
How many points lost: 24 (6*4)
How many points added: 10
He lost 24 points, but gained back 10. So, Ned really only lost 14 points overall.
3,397 is 13.7 percent of what number
3397% of 13.7 = 465.389
Ben drank 2/5.of a pitcher lemonade.Tonya drank 1/4 of the Lemonade.what is the fraction of the lemonade did they drink together?step step explanation who work with plz
Answer: 13/20
Step-by-step explanation:
Find the lowest common denominator (20)
Multiply the numerators by the other denominators
(2 * 4)
--------
20
&
(1 * 5)
--------
20
8/20 + 5/20 = 13/20
4) u= 6a + 2b, for a
What is the solution for A?
Answer:
a = (u-2b)/6
Step-by-step explanation:
First get a by itself by subtracting 2b from both sides:
u-2b = 6a
Then isolate the variable by dividing both sides by six:
(u-2b)/6 =a
A copy machine can print 480 copies every 4 minutes. A teacher printed 720 copies. How long did it take to print?
Answer:
10 min.
Step-by-step explanation:
Answer:
6 minutes
Step-by-step explanation:
10( x+1/2)=3x+5+7x
Please help
Answer:
All real numbers are solutions
Step-by-step explanation:
10(x + 1/2) = 3x + 5 + 7x
~Distribute left side
10x + 5 = 3x + 5 + 7x
~Combine like terms
10x + 5 = 10x + 5
~Subtract 5 to both sides
10x = 10x
~Divide 10 to both sides
x = x
~Subtract x to both sides
0 = 0
Best of Luck!
Jose scored 80% on Part A of a math test and 92% on part B of the math test. His total mark on the test was 63. The total possible marks for the test was 75. Which system of equations represents this situation?
a (0.80A + 0.92B = 63 A + B = 75
ь (80A + 92B = 63 A + B = 75
с 0.80A + 0.92B = 75 A+B=63
d (80A + 92B = 75 A+B=63
Answer:
A
Step-by-step explanation:
Can you Please help me. With this
Simplify the expression!
3/4(z+2/5)+2z =?
thank you for your help btw!!
The solution of the expression is (55z + 6 ) / 20.
What is an expression?Expression in maths is defined as the relation of numbers variables and functions by using mathematical signs like addition, subtraction, multiplication and division.
Given that the expression is 3/4(z+2/5)+2z. The expression will be solved as below,
E = 3/4(z+2/5)+2z
E = 3/4( z + 2 / 5 ) + 2z
E = 3/4 ( 5z + 2) / 5 + 2z
E = ( 15z + 6 + 40z ) /20
E = (55z + 6 ) / 20
Therefore, the solution of the expression is (55z + 6 ) / 20.
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Luis, Carlo, and Ken bought movie
tickets. Each ticket cost the same
amount. The 3 tickets cost $21. How
much did Carlo pay for his ticket?
Use a model to justify your answer.
An amusement park has two roller coasters. One is 628 feet long, and the other is 485 feet long if you ride both roller coasters, about how many feet will you travel in all
Answer:
1113
Step-by-step explanation:
628ft+485ft=1113ft
What is f(g(x)) when f(x) = x ^ 2 + 5 , and g(x) = 10 - 5x ?
A function f (x) and g (x) then:
(f + g) (x) = x² - x + 6
Further explanation
Like the number operations we do in real numbers, operations such as addition, installation, division or multiplication can also be done on two functions.
Suppose a function f (x) and g (x) then:
(f + g) (x) = f (x) + g (x)
(f + g) (x) is a new function of the sum of f (x) and g (x)
Likewise with other function operations:
(f-g) (x) = f (x) - g (x)
(fg) (x) = f (x) x g (x)
(f / g) (x) = f (x) / g (x)
In addition to the above operations we can combine two functions using the function composition with the symbol o
(fog) (x) = f ((g (x))
Known on the question
f (x) = x² + 1
g (x) = 5 x
Summing the two functions f (x) and g (x):
(f + g) (x) = f (x) + g (x)
(f + g) (x) = x² + 1 + 5 - x
(f + g) (x) = x² - x + 6
HELP ASAP
Help me figure this out I need to do it fast
Answer: (1,4) (2,8) (3,12)
Step-by-step explanation:
brainliest will be givenChristine has a summer job cutting grass.
She earns $400 every 2 weeks. How much
will she earn over the summer holidays,
which are 12 weeks long?
Answer:
$2400 in 12 weeks is your answer
A total of 910 tickets were sold for 5 dance
performances. What was the average number
of tickets sold for each performance?
Answer:
182
Step-by-step explanation:
910/5=182
A scientist has a 10 pound alloy
Answer:
good for him
Step-by-step explanation:
Brainliest Plzzz!!!
Answer:
Is this free points? well thx! if u actually need help let me know
Step-by-step explanation:
Brainliest please
Pack of 50 stickers costs 4.50 what the uniy price
A softball pitcher has a 0.487 probability of throwing a strike for each pitch. If the softball pitcher throws 29 pitches, what is the probability that no more than 14 of them are strikes? Insert the correct symbol to represent this probability.
Answer:
P(x≤14) = 0.556
Step-by-step explanation:
Given:
Probability of throwing a strike (p) = 0.487
Total number of throw (n) = 29
Find:
Probability that no more than 14 of them are strikes P(x≤14)
Computation:
Mean(np) = (29)(0.487)
Mean(np) = 14.123
Standard deviation = √[mean( 1- p)]
Standard deviation = √[14.123( 1 - 0.487)]
Standard deviation = 2.6917 (Approx)
P(X < x) = P[(Z < (x - mean)]/[Standard deviation])
P(x≤14) = P(Z < (14.5 - 14.123) / 2.6917 )
P(x≤14) = 0.556
The measure of an angle in standard position is given. Find two positive angles and two negative angles that are coterminal with the given angle. (Enter your answers as a comma-separated list.)
Answer:
The answer is below
Step-by-step explanation:
Let us assume the angle is -π/4.
Coterminal angles are angles that have the same initial side and terminal side. They are angles in standard position (angles with the initial side on the positive x -axis) that have a common terminal side.
Positive coterminal angles are gotten by adding 360° if the angle is in degrees or 2π for angles in radian while negative coterminal angles are gotten by subtracting 360° if the angle is in degrees or 2π for angles in radian.
Positive coterminal angle = -π/4 + 2π = 7π/4, 7π/4 + 2π = 15π/4
Positive coterminal angle = 7π/4, 15π/4
Negative coterminal angle = -π/4 - 2π = -9π/4, -9π/4 - 2π = -17π/4
Negative coterminal angle = -9π/4, -17π/4
The graph of which of the following equations contains the point (-3,0)?
A
x+y=3
B.
-x - y=-3
C. x-y=3
D. x+y=-3
Answer:
you need help kd
Step-by-step explanation:
Help ASAP). Graph the function: Look at the picture for the problem. Brainliest Answer. Show me points of graph paper so I can see
[tex]the \: points \: are: \\ (−1, \: 0) \\ (1, \: 2) \\ (4, \: 2)
\\
Step-by-step \: explanation: \\ \\
f(x) = x + 1 \: ....if \: x < 0 : \iff \: ( - 1, \: 0) \\ if \: x = - 1 \: then \: y = 0\\ \\ f(x) = 2 \: ....if \: 0 . \leqslant x \leqslant 1 :\: \iff( 1, \: 2) \\if \: x = 1\: then \: y = 2. \\ \\ f(x) = x\: ....if \: x > 1 : \: \iff( 2, \: 2) \\ if \: x=2 \: then \: y=x=2.[/tex]
♨Rage♨
9.5 -9.45 suntract and decimales
Answer:
its 0.05
Step-by-step explanation:
