You have 105 mL of a 40% alcohol solution, which contains 0.4 • 105 mL = 42 mL of alcohol.
If you mix it with x mL of 80% solution, you end up with a (105 + x) mL solution that contains (42 + 0.8x) mL of alcohol.
In this solution, you want to have a concentration of 45%, so
((42 + 0.8x) mL) / ((105 + x) mL) = 0.45
Solve for x :
(42 + 0.8x) / (105 + x) = 0.45
(42 + 0.8x) / 0.45 = 105 + x
280/3 + 16/9 x = 105 + x
7/9 x = 35/3
x = 15
So you need 15 mL of the 80% solution.
How to learn
basic algebra
Answer:
I recommend watching videos of Indian people explaining it to you they are the best.
Answer:
Khan Academy, Brainly, and Algebra tiger have helped me
Step-by-step explanation:
The wesbites listed will provide step by step answers to problems, and as you have seen on here, you can ask personalized questions and get step by step answers to remember how to work out a problem.
I hope this helped becuase these are the main websites that helped me!
A menu has 5 choices of appetizers, ten main courses, and seven desserts. How many meals are possible?
Using the Fundamental Counting Theorem, it is found that 350 meals are possible.
What is the Fundamental Counting Theorem?It is a theorem that states that if there are n things, each with [tex]n_1, n_2, \cdots, n_n[/tex] ways to be done, each thing independent of the other, the number of ways they can be done is:
[tex]N = n_1 \times n_2 \times \cdots \times n_n[/tex]
Considering the menu described in the problem, we have that:
[tex]n_1 = 5, n_2 = 10, n_3 = 7[/tex].
Hence the number of meals possible is given by:
N = 5 x 10 x 7 = 350.
More can be learned about the Fundamental Counting Theorem at https://brainly.com/question/24314866
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-6(-2n - 2) - 8(5 + 4n) = -2n - 11n
Answer:
n= -4
Step-by-step explanation:
-20n-28=-13n
-20n=-13n+28
-20n+13n=28
-7n=28
n=-4
Solve for x 16-x=-2 give me the answer
[tex]\text {Hi! Let's Solve this Equation!}[/tex]
[tex]\text {\underline {The First Step is to Flip the Equation}}[/tex]
[tex]\text {Before: 16-x=-2}\\\text {After: x+16=-2}[/tex]
[tex]\text {\underline {The Next Step is to Subtract 16}}[/tex]
[tex]\text {x+16-16=-2-16}[/tex]
[tex]\text {Your New Problem Is: x=-18}[/tex]
[tex]\text {\underline {The Final Step is to Divide -1}}[/tex]
[tex]\text {x/-1=-18/-1}[/tex]
[tex]\text {Your Answer Would Be:}[/tex]
[tex]\fbox {x=18}[/tex]
[tex]\text {Best of Luck!}[/tex]
Answer:
18
Step-by-step explanation:
16 - x = -2
-x = -2 - 16
-x = -18
x = 18
Hopefully this answer helps you :)
Always true, sometimes true, or never true: When dividing a dividend that has decimal values I have to move the decimal point.
Answer:
True
Step-by-step explanation:
Hope this helped, have an AMAZING day!!
Question 4 (4 points)
The copier technician charges $50 to come to a school for a service call. He then charges $75 per hour to repair
the copier. Write an equation for the total cost, y, of a service call that lasts for x hours.
b
y-2/3 x
y=50x-75
y 75x+50
y=50x+75
с
d
whats the answer to 4.23872345.25135x4446.56559=
Answer: the correct answer is 18,847.76184947253
Answer:
1.884776184E1284776184947.2528110465
Step-by-step explanation:
I dont have one
Which statement is true about the graphs of the two lines y = –6 and x = ?
Answer:
there is nothing there show the graph or smth
Step-by-step explanation:
brrrrrrrrrrrrrrrrrrr
2.48 >2.4 1>2.463 find the unknown digit to make each statement true
Answer:
7
Step-by-step explanation:
2.48>2.471>2.463
please mark brainliest
The first three terms of an arithmetic sequence are as follows
3, -4 , -11
Answer:
12
Step-by-step explanation:
the firt three terms of an arithmetic
Subtract.
6 10/11−3 2/11
Enter your answer as a mixed number in simplest form by filling in the boxes.
Answer:
[tex]3\frac{8}{11}[/tex]
Step-by-step explanation:
[tex]6\frac{10}{11} = \frac{76}{11}[/tex] [tex]3\frac{2}{11} = \frac{35}{11}[/tex] [tex]\frac{76}{11} - \frac{35}{11} = \frac{41}{11}[/tex] [tex]\frac{41}{11} = 3\frac{8}{11}[/tex]I hope this helps!
Answer:
free points i seee
Step-by-step explanation:
sorry
here you go gggsggdssds
HELP ME PLEASE will give brrianliest
Answer:
Its B
Step-by-step explanation:
Answer:
c
Step-by-step explanation:
they are cungruint line segments
Let f(x) = x + 7 and g(x) = x − 4. Find f(x) ⋅ g(x).
x2 − 3x −28
x2 − 3x − 11
x2 + 3x − 28
x2 + 3x − 11
Answer:
Step-by-step explanation:
(x + 7)(x - 4) = x^2 - 4x + 7x - 28 = x^2 + 3x - 28
Mimi eats 6 times as many raisins as mary.mary eats 9 raisins. Write an equation with an unknown to find the number of raisins Mimi eats.
Answer:
54 :/
Step-by-step explanation:
Well if mary ate 9 raisins and Mimi ate 6 times as much you just have to do:
9 x 6 = 54
y = 9 x 6?
When you add opposite numbers (2+-2), what do you get?
a. 0
b. A negative number
c. Attraction
d. You can not add opposites
Answer:
0
Step-by-step explanation:
adding a positive and negative number that is the same like in the example (2+-2) you would get 0
In the equation y=9x - 5, the y-intercept is -5.
Question 3 options:
True
False
Answer:
true
Step-by-step explanation:
y=mx+b
and b=y intercept
Answer:
True
Step-by-step explanation:
9 is the x intercept and -5 is the y intercept. y in the equation is the answer.
HELP :((( PLS ILL MAKE U BRAINLIEST
Answer:
a. an=18-6n
b. an=0.7+2.8n
Step-by-step explanation:
a. 12-6(n-1)
12-6n+6
18-6n
b.3.5+2.8(n-1)
3.5+2.8n-2.8
0.7+2.8n
please help!!!!!!!!!!!!!!!!!!!!!!!!!1 and fast
Answer:
the answer is D.
Step-by-step explanation:
hope it helps :)
On the boardwalk at the beach, there were beach towels for sale. They were $20.98 each. Marie’s mom bought 5 of them. About how much did he spend?
Answer:
$104.90
Step-by-step explanation:
Did the math for you.
Have a good day!
Answer:
104.90 or 105$ rounded
Step-by-step explanation:
you do 20.98 (how much they cost) x 5 (how much he bought) = 104.90 (total cost.
Hope this helps :P
Divide the following rational numbers: -2/3÷4/5 Be prepared to explain how you found your answer.
Answer:
-5/6
Step-by-step explanation:
-2/3÷4/5
= -2/3* 5/4 (Because multiplication and division are inverse operations)
= -5/6
Graph the equation.
x-2y=0
Answer:
hope this helps :)
Step-by-step explanation:
State the x-values where the limit does not exist.
9514 1404 393
Answer:
x = -2x = 2Step-by-step explanation:
There are vertical discontinuities in the function at x=-2, x=2, and x=4. When looking at limits, we find the function values to be different either side of those discontinuities at x = -2 and at x = 2. Thus, limits do not exist at those points (x = {-2, 2}).
At x=4, the discontinuity is in the function definition, not in the values left or right of that point. Hence the limit does exist at x=4, but the function is not continuous there.
WILL GIVE BRIANLEST IF UR RIGHT PLZ SHOW UR WORK need help plz
Answer:
it is 1)
Step-by-step explanation:
73.458
x 0.39
________
661122
2203740
How do you do this question?
Answer:
-6x²
36
Step-by-step explanation:
1 / (1 + 6x²) = 1 / (1 − r)
Therefore, r = -6x².
The third term, r², is 36x⁴.
What is the difference between independent and dependent events?
When multiplying two negative integers what what is the sign of the product
A chef uses 1/2 cup of tomatoes for every 1/8 cup of onions to make salsa. How
many cups of onions will the chef need for 1 cup of tomatoes?
Answer:
he or she will need to use 2/8 cups of onions for 1 cup of tomatoes to be used
Step-by-step explanation:
The chef need 1/4 cups of onion for 1 cup of tomato.
What is fraction?Fractions are used to represent smaller pieces (or parts) of a whole.
Given that, a chef uses 1/2 cup of tomatoes for every 1/8 cup of onions to make salsa
So, for 1/2 → 1/8
Multiplying each side by 2 to get 1 cup of tomato,
1 → 2/8 = 1/4
Hence, the chef need 1/4 cups of onion for 1 cup of tomato.
For more references on fractions, click;
https://brainly.com/question/10354322
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I am an odd number. Take away one letter and I become even. What number am I?
Answer:
*facepalm* 7 lol thats an oldie > u <
Step-by-step explanation:
7 - s = even
Answer: seven
Step-by-step explanation:the number 7 is odd but then you take away the s and it becomes even.
If it is 40 degrees Celsius, what is the temperature in Fahrenheit
Answer:
104.0 °F
Step-by-step explanation:
Divide Celsius by 5, then multiply by 9, then add 32 = Fahrenheit
Please mark as BRAINLIEST!!!!!!!!!!!1
