To make 100 ml of 25% saline solution, Riley will need 50 ml = 12% saline mixture and 50 ml= 38% saline mixture.
Given,
We have 12% and 38% of saline mixtures.
We need to find the amount in ml from each saline mixture which would give us 100 ml of 25%.
What are the methods to solve a system of linear equations?
There are a number of methods but the most and easiest used method is the substitution method and the elimination method.
We can make two linear equations from the given statements.
Let x = amount from 12% saline mixture and y = amount from 38% saline mixture.
Now we need to make 100 ml of 25% saline.
so,
x + y = 100.
So we have two equations.
x + y = 100..............(1)
12% of x + 38% of y = 100 x 25%
0.12x + 0.38 = 25 ...............(2)
Using the substitution method we have,
x = 100 - y
Putting x = 100 - y in {2}
0.12 ( 100 - y ) + 0.38y
= 2512 - 0.12y + 0.38y
= 250.38y - 0.12y
= 25 - 120.26y = 13y
= 13 / 0.26y = 50.
Putting y = 50 in (1)
x + y = 100x
100 -50x = 50.
So Riley will need 50 ml = 12% saline mixture and 50ml = 38% saline mixture to make 100 ml of 25% saline solution.
Learn more about finding proportion of mixtures here:
https://brainly.com/question/20366557
#SPJ2
3. A large banquet room holds 288 people, with each table seating 8. How many tables can the banquet hall have without going over its capacity? Maneuvering the Middle LLC.
Answer: 36 tables
Step-by-step explanation: Just divide 288 by 8. I hope this helps!
To the nearest hundredth, how many kilometers are equal to 5 miles?I’ll mark brainliest!
Answer:
8.04
Step-by-step explanation:
Baseball hat for
$22.90 at 5% sales tax
Answer:I got $21.76
Step-by-step explanation:
;-;
multiply 7/15 ,a 2 what is
answer
I just need the answer
Answer:
The answer is B
Step-by-step explanation:
Your welcome
9. A ranch has 575 cows on 25 acres of land. Which rate best represents the relationship
between the number of cows and the number of acres?
Answer:
10/10
Step-by-step explanation:
Choose the rule to describe the transformation:
D(-3, -4), C(-3, -1), B(0, -4)
to
D '(3, -4), C '(3, -1), B '(0, -4)
a. reflection across the y-axis
b. reflection across y = -x
c. translation: (x,y)LaTeX: \longrightarrow⟶(x + 4, y)
d. reflection across y = x
Answer:
a. reflection across the y-axis
plzz answerr!!!!
will mark as brainlist!!
Answer:
16160
Step-by-step explanation:
(2021#2020)= [tex]2021^2-2020^2=4041[/tex]
(2020#2019)=[tex]2020^2-2019^2=4039[/tex]
finally, (2021#2020)#(2020#2019)= [tex]4041^2-4039^2=16160[/tex]
Evaluate the expression for the given value of x.
6.5x - 3.5 for x = 9
The solution is...
Answer:
55
Step-by-step explanation:
6.5x - 3.5 [x = 9]
6.5(9) - 3.5
58.5 - 3.5 = 55
Sadie went shopping over the weekend and found a sweater that she liked that was regularly 3
$33. She used her 20% off coupon to save her some money. How much money will Sadie save
on the sweater? *
help me quick!!!..!..!
Answer:more info needed
Step-by-step explanation:
· The length of a room is 2 times it breadth and 5 times it height. If
the volume of the room is 800m3, find the cost of Parering its
walls at Rs. 6 Per m2?
Answer:
https://brainly.in/question/5989727 go here theres your answer
Step-by-step explanation:
HELP ME THIS IS IMPORTANT !!! Look at the image
Answer:
D
Step-by-step explanation:
her value is greater
Which expressions simplify to a rational answer?
Select each correct answer.
O 15.15
O2V9.4
0 V3.16
O 7V3.13
An elephant is as strong as how many horses?
Answer:
Knowing that 1 elephant and 2 horses were as strong as 6 horses, I removed 2 horses from both sides of this situation, leaving me with the fact that 1 elephant is as strong as 4 horses.
Step-by-step explanation:
pls give me brainleast
Please help me I need to turn in tomorrow
Answer:
D. 0.5
Step-by-step explanation:
There are 4 groups
1. Alto
2. Bass
3. Tenor
4. Soprano
The question says "what is the probability that this member comes from the alto section"
Since there are 4 groups, I did 4/8 (since there are 8 people in Alto) and I got 0.5.
Hope I got it right and it helped you
*Note* I most likely got it right I just doubt myself too much lol
But just in case, I hope I got it right.
Answer:
there are 4 parts in that choir and the alto members are 8 in number so we say those in alto divided by the number of parts, we get→ 4÷8 =0.5, that's the ans.
Name all the angles congruent to
Answer:
Since you didn't specify congruency to which angle, I am giving below all angles that are congruent in two groups.
Step-by-step explanation:
Group ONE:
All these angles are congruent <ABE = <BCF = <GBC = < HCD
Group TWO:
All these angles are congruent <EBC = <CFD = <ABG = <BCH
Consider functions h and k
Answer:
D
Step-by-step explanation:
got it correct on EDMENTUM
A brainliest will be rewarded to the best answer!
Which expression has a value of 11?
A. 13 - 5 - 3
B. 1 + (8 x 2)
C. 5 + 2 x (4 - 1)
D. 15 - 1 + (6 ÷ 2)
Answer:
C. 5 + 2 x (4 - 1)
Step-by-step explanation:
5 + 2 x (4 - 1)
*following order of operations*
5 + 2 * 3
5 + 6
= 11
need help with my geometry question please
Answer:
The correct answer is C 62°
Answer:
C. 62
Step-by-step explanation:
Vertically opposite angles are congruent.
Angle RSQ = 62, therefore Angle TSU must also equal 62 degrees.
Colleen is 15 years from retiring. She opens an account at the Savings Bank. She plans to deposit
$10,000 each year into the account, which pays 1.7% interest, compounded annually.
a. How much will be in the account in 15 years?
b. How much interest would be earned?
Please put how to work it out!!!!
9514 1404 393
Answer:
a) $169,234.59
b) $19,234.59
Step-by-step explanation:
The first question you must answer is whether Colleen will earn interest on her first deposit in the first year. That is, does she deposit the money at the first of the year or the end of the year?
The usual "annuity" formula assumes the deposit is at the end of the year, so no interest at all is earned on the last deposit made. If the deposit is at the first of the year, an "annuity due" formula is used, that multiplies the entire ending account value by the annual multiplier, 1.017 in this case.
__
a) Assuming an "annuity", the formula is ...
A = P((1 +r)^t -1)/r . . . . . for annual compounding at rate r for t years
A = $10,000(1.017^15 -1)/0.017 = $169,234.59 . . . . ending balance
__
b) Colleen has made 15 deposits of $10,000, for a total of $150,000, so the amount of interest earned is ...
$169,234.59 -150,000 = $19,234.59 . . . . interest earned
The expression ( x 22 )( x 7 )3 is equivalent to xp. What is the value of p ?
Answer:
p=43
Step-by-step explanation:
Answer:
d
Step-by-step explanation:
d
Which of the following represents a relation that is not a function?
A.
x -7 -5 -7 1
y 33 31 39 33
B.
x 8 -5 13 -7
y 33 31 39 33
C.
x -7 -5 -1 1
y 33 31 39 33
D.
x -7 -5 8 13
y 33 31 39 33
Answer:
C.
x -7 -5 -1 1
y 33 31 39 33
Step-by-step explanation:
think so
When dividing a number what way the decimal move left or right
Which of the following is the equation of the line that is perpendicular to y=-4x-5 and goes through the point (-2, 3)? Question 14 options: y=-4x-5 y=-1/4x+5/2 y=1/4x+7/2 y=4x+11
Answer:
The equation of the perpendicular line to y=-4*x-5 is [tex]y=\frac{1}{4}*x+\frac{7}{2}[/tex]
Step-by-step explanation:
Perpendicular lines are two or more lines that intersect at an angle of 90 degrees. Being y = m * x + b the equation of a line, two lines, with a slope other than zero, are orthogonal or perpenducillary if and only if the product of their slopes is -1. In other words, if two lines are perpendicular, they have their slopes reversed and sign changed.
In this case, with y = -4x-5 the slope will be -4. So the slope of the perpendicular line will be [tex]\frac{1}{4}[/tex]. Then the equation of the perpendicular line will be:
[tex]y=\frac{1}{4}* x+b[/tex]
To find the value of b, you know the value of the point (-2,3). So x = -2 and y = 3. Replacing in the equation of the perpendicular line, you have:
[tex]3=\frac{1}{4}* (-2)+b[/tex]
Solving, you get:
[tex]3=-\frac{1}{2}+b[/tex]
[tex]3+\frac{1}{2}=b[/tex]
[tex]\frac{7}{2}=b[/tex]
The equation of the perpendicular line to y=-4*x-5 is [tex]y=\frac{1}{4}*x+\frac{7}{2}[/tex]
Don't steal points
its not cool
i WILL report
and also
answer this and u could have a chance to get brainliest
ill be asking 10 questions
whoever has the best answer in any of these ill give brainliest :D
Answer:
==================== not < or >
Step-by-step explanation:
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hehe, the explanation is down here xD
m=3
4m-1=4*3-1
so then it's 12-1 which is 11
5m-4=5*3-4
15-4 thats 11
wait ok so
11=11
Answer:
=Step-by-step explanation:
m = 3
4m - 1 = 4(3) - 1 = 12 - 1 = 11
5m - 4 = 5(3) - 4 = 15 - 4 = 11
4m - 1 = 5m - 4
Answer: =omg please help. make sure you put the product of A, the product of B, and the sum for C. it’s in the picture
Answer:
Product for A = 046
Product for B = 0230
Sum for C = 0.0276
Step-by-step explanation:
We need to multiply the terms and find the answers
First we multiply 2 with 0.23, then we multiply 1 with 0.23
0.23
x 0.12
-------------
046
0230
--------------
.0276
Since there are 2 numbers after decimal in 0.23 and same for 0.12, so we place the decimal so that there are 4 decimal places.
Counting of decimal will start from the units place.
So, Product for A = 046
Product for B = 0230
Sum for C = 0.0276
The distance between Columbia and Savannah is 6.5 inches on a map. If the map scale is 1 inch = 30 miles, what is the actual distance between the towns?
Answer:
195 miles
Step-by-step explanation:
Because if 1 inch= 30 miles you would have to multiply 30 by 6 because there is 6 inches, which is 180. The you have to look at the .5. .5 is half an inch, so you have to divide 30 by 2. you get 15 and then add 15 to the 180 and get 195.
I hope this helps!! Have a wonderful day!!! :D
HELP PLZ.
will give brainliest
Answer:
D
Step-by-step explanation:
Out of 482 employees at the Coca Cola plant 37 are taking a vacation next week what percentage of employees are not vacationing
Answer:
92.3% are not vacationing
Step-by-step explanation:
482 - 37 = 445
445 * 100 / 482 = 92.3