Answer: 480 mL, 600 mL
Step-by-step explanation:
Given
The concentration of the first acid is 75%
The concentration of the second acid is 30%
The final mixture has a concentration of 50%
The final volume is 1080 mL
Suppose x and y be the volume of the first and second acid
[tex]\therefore x+y=1080\quad \ldots(i)\\0.75x+0.3y=0.5\times 1080\quad \ldots(ii)[/tex]
Solving the above equations we get
[tex]x=480,y=600[/tex]
So, the quantity of the first acid is 480 mL and 600 mL for the second mixture.
help me please I dont know this
Answer:
answer: 384
Step-by-step explanation:
Hello! cubes are very simple! since there all the same measure and 6 faces all we have to do is 8 × 8 = 64 sense we know 1 face is 64 we just have to multiply by 6 cause there is 6 faces so
64 × 6 = 384 Hope this helps you!
what’s the answer please i don’t need work shown :)
Answer:
102
You didn't ask for work and I shall respect your wish
Please help marking people as brainlist
What pre-reading strategy would help you determine which items or information might be important to learn?
Answer:
Discussion.
Pictures.
The title.
Story telling.
Short conversations.
Step-by-step explanation:
The local branch of the Internal Revenue Service spent an average of 21 minutes helping each of 10 people prepare their tax returns. The standard deviation was 5.6 minutes. A volunteer tax preparer spent an average of 27 minutes helping 14 people prepare their taxes. The standard deviation was 4.3 minutes. At α = 0.02, is there a difference in the average time spent by the two services? Find the 98% confidence interval for the two means.
a. State the hypotheses and identify the claim.
b. Find the critical value(s).
c. Compute the test value.
d. Make the decision.
Answer:
The confidence Interval is [- 0.7053 10.4521]
a: The hypotheses are
H0: μ1=μ2 against the claim Ha :μ1≠μ2
b. The critical value for t∝/2 for 17 d.f t > 2.508 and t < -2.111
c. t= -2.8422
d. The calculated value of t= -2.8422 is less than t < -2.11 the critical value therefore we reject H0 and conclude there is a difference between the two means.
Step-by-step explanation:
When the standard deviations are not the same then the confidence intervals for mean differences are calculated as
(x1`-x2`)- t∝/2 √s1²/n1 + s2²/n2 < u1-u2 < (x1`-x2`)+ t∝/2 √s1²/n1 + s2²/n2
x1`= 21 x2`= 27
n1= 10 n2= 14
s1= 5.6 s2= 4.3
The degrees of freedom is calculated using
υ = [s₁²/n1 + s₂²/n2]²/ (s₁²/n1 )²/ n1-1 + (s₂²/n2)²/n2-1
= 17
The t∝/2 for 17 d.f = 2.11
Putting the values
(x1`-x2`)- t∝/2 √s1²/n1 + s2²/n2 < u1-u2 < (x1`-x2`)+ t∝/2 √s1²/n1 + s2²/n2
(21-27) - 2.11√5.6²/10+ 4.3²/14 < u1-u2 <(21-27) +2.11√5.6²/10+4.3²/14
6- 2.11*2.111 < u1-u2 < ( 6 ) +2.11*2.111
6- 4.4521 < u1-u2 < ( 6 ) +5.294
- 1.5479 < u1-u2 < 10.4521
The confidence Interval is [- 0.7053 10.4521]
a: The hypotheses are
H0: μ1=μ2 against the claim Ha :μ1≠μ2
The claim is that there is a difference in the average time spent by the two services
b. The critical value for t∝/2 for 17 d.f t > 2.508 and t < -2.111
The degrees of freedom is calculated using
υ = [s₁²/n1 + s₂²/n2]²/ (s₁²/n1 )²/ n1-1 + (s₂²/n2)²/n2-1
= 17
c. The test statistic is
t= (x1`-x2`) /√s1²/n1 + s2²/n2
t= (21-27) /√5.6²/10+ 4.3²/14
t= -6/2.111
t= -2.8422
d. The calculated value of t= -2.8422 is less than t < -2.11 the critical value therefore we reject H0 and conclude there is a difference between the two means.
anthony went on a bike ride. He rode two-thirds of a mile in three-fourths of an hour. What was his biking speed in miles per hour?
Simplify the expression.Write your answer as a power.
w^8 w^5
------ × ------- =
w^7 w^2
Give the coordinates of point A.
Answer: -2,-5
Step-by-step explanation:
The red point is located in the 3rd quadrant in the graph. So that means both the y and the x are negative. So first you go by the x value, the point is located on the 2 space left (-) from the origin (center) of the graph and then you have to go 5 spaced down (-). So point A is located at (-2,-5).
HELP PLEASEEEEEEEEEEEEEEE
Answer:
Step-by-step explanation:
12²+15² is 369. square root of 369 is 3[tex]\s\sqrt{41[/tex] or 19.2
Find the value of x.
120°
97°
xo
130°
150°
X=
Answer: X= 133
Step-by-step explanation:
You select a marble from two different bags. You have a 30% chance of choosing a blue marble from the first bag and a 70% chance of choosing a blue marble from the second bag. Design and use a simulation to estimate the probability that you choose a blue marble from both bags.
Answer:
50 percent is the average
PLEASE HELP ILL GIVE BRAINLIEST !!! 100 POINTS !! NO FAKE ANSWERS !
Answer:
qweqw
Step-by-step explanation:
qeqe
How to translate f(x)(blue) to g(x) red?
Answer:
g(x) = [tex]\sqrt{x+2}[/tex] - 3
Step-by-step explanation:
g(x) = [tex]\sqrt{x+2}[/tex] - 3
Round to the nearest hundredth (2 decimal places) when necessary
Answer:
138.23 is the circumference
hope this helps
have a good day :)
Step-by-step explanation:
Answer:
If it's area, then:
area = 1519.76 in²
Step-by-step explanation:
radius = 44/2 = 22
area = πr² = (3.14)(22²) = 1519.76 in²
Identify the constant term of
14 - 8x - 7y
Answer:
14
Step-by-step explanation:
please help
The graphs below have the same shape. What is the equation of the blue graph?
A. g(x) = (x - 2)2 + 1
B. g(x),= (x - 2)2 -1
C. g(x) = (x + 2)2 - 1
D. g(x) = (x + 2)2 + 1
Answer:
A
Step-by-step explanation:
Graph the parabola using the direction, vertex, focus, and axis of symmetry.
Vertex: (2,1)(2,1)
Focus: (2,54)(2,54)
Axis of Symmetry: x=2
Hope it helped :)
Why was Algebra so hard? Was it because a, b, and c replaced numbers?
Answer:
Yep
Step-by-step explanation:
YEPP UGH I hate MAth
simple math for 18 points !!
Hi there!
[tex]\large\boxed{C. \text{ } \$ 272.50}[/tex]
To begin, we can find the amount he is paid from his hourly wage:
$12.75 × 6 = $76.5
Calculate the commission by adding up the sales to get the total:
$1200 + $2350 $975 + $375 = $4900
4% of $4900 = 4900 × 0.04 = 196
Add the total wage and commission together:
76.5 + 196 = $272.50
Answer:
c 272.50
Step-by-step explanation:
2.52343454 + -34355343.99
NEED HELP PLZZZZZZ ASAP
Answer:
5555555555555555555555555555555555555 trust
Step-by-step explanation:
Select all of the expressions that are equivalent to 18x+6.
4 points
10 (2x + 1) - 2x - 4
6 (3x + 1)
0 Option 1
D Option 2
10 (2x + 1) + 2x - 4
(1 + 3x) 6
Option 3
Option 4
2 (8x + 3) + 2x
Answer: Option 2
Step-by-step explanation:
6(¹⁸ˣ⁄₆+ ⁶⁄₆)
Simplified: 6(3x+1)
Answer now boi/gurl, Tahke yuo
Answer:
Seems like it's B
Step-by-step explanation:
The rest seem wrong.
---↓
A- Jon paid $235.50 for yard work. He paid $25.00 to have some
bushes trimmed and $35.50 each time he had his grass mowed. What is
x, the number of times Jon had his yard mowed? | The equation is 25x + 35.50 = 235.50 . That means this answer is probably wrong.
·
C- Jon paid $235.50 for yard work. He paid $35.50 to have some
bushes trimmed and $25.00 each time he had his grass mowed. What is
x, the number of bushes Jon had trimmed? | Once again, the equation is 25x + 35.50 = 235.50 . That means this answer is probably wrong too.
·
D- Jon and his neighbor paid $235.50 for yard work. Jon paid $35.50 to have some bushes trimmed and his neighbor had some bushes trimmed for $25.00 each. What is x, the amount of money Jon paid to have his bushes trimmed? | It says that Jon paid $35 to have his bushes trimmed in the sentence.
~~~~~~~~~~~~~~~~~~~~
B- Jon paid $235.50 for yard work. He paid $35.50 to have some
bushes trimmed and $25.00 each time he had his grass mowed. What is
x, the number of times Jon had his yard mowed?
The equation is 25x + 35.50 = 235.50 || We would put the x after 25 because it's asking "What is x, the number of times Jon had his yard mowed?" This seems correct.
Therefore, the answer would be B
Mieko said that the difference between the longest rose and the shortest rose is 1 inch. Is she correct?
Use the drop-down menus to show and explain your answer.
Answer:
Mieko is correct
Step-by-step explanation:
Given
See attachment for complete question
Required
The length difference
Lengths with dot(s) means, there is at least 1 rose flower of that length.
So, from the attachment, we have:
[tex]Longest = 14.0[/tex]
[tex]Shortest = 13.0[/tex]
The difference (d) is:
[tex]d = Longest - Shortest[/tex]
This gives:
[tex]d = 14.0 - 13.0[/tex]
[tex]d = 1\ in[/tex]
Hence, Mieko is correct
Teresa Alice drove 383.5 miles in 6.5 hours. What is her average rate of speed?
Answer:
59
Step-by-step explanation:
383.5/6.5=59
What is the area?
5 mi
3 mi
square miles
Answer:
15 square miles
Step-by-step explanation:
For area you multiply length times width.
5×3 = 15
[tex]s = 2\pi(r + h)[/tex]
find r
FREE POINT GIVE AWAY!!!!!! Just solve my equation 5*4+2=? (I already know the answer)
Answer:
22
Step-by-step explanation:
I did the math in my head sooo if it's wrong I know why
Which team had about 20% of the wins of the baseball
season?
A) Badgers
B) Stingray
C) Twins
D) Wasps
please answer ive been waiting half hour
Every plant bloomed in the spring. The simple subject of this sentence is _____.
every
every plant
plant
bloomed
The subject is the idea,being or thing being discussed.
Should be "plant". Its the Main thing being discussed.
Sheila is cutting a sector out of a circle with area 42 cm2. She wants the sector to have a central angle to measure between 25° and 35°, 5π36 radians and 7π36 radians respectively. Which of the following are possible areas for the sector? Select the two correct answers
2.5 cm2
3.8 cm2
3.5 cm2
2.7 cm2
4.6 cm2
irs 2.7jsjsjsjjsjssjjw I have no idea what is I to on to with
In ancient Egypt, mathematicians and architects used 10 as an approximation for π . The circular floor of an ancient arena is paved with tiles. The floor of the arena has a radius of 100 feet.