Answer:
-5 degrees fahrenheit
How many liters each of a 45% acid solution and a 70% acid solution must be used to produce 50 liters of a 65% acid solution? (Round to two decimal places if necessary.)
Answer:
The number of liters of the 45% acid solution = 10 liters
The number of liters of the 70% acid solution is = 40 liters
Step-by-step explanation:
How many liters each of a 45% acid solution and a 70% acid solution must be used to produce 50 liters of a 65% acid solution? (Round to two decimal places if necessary.)
Let x be the number of liters of the 45% acid solution
The number of liters of the 70% acid solution is y
x + y = 50
x = 50 - y
Also
How many liters each of a 45% acid solution and a 70% acid solution must be used to produce 50 liters of a 65% acid solution?
We have:
45% × x + 70% × y = 65% × 50
0.45x + 0.70y = 0.65 × 50
0.45x + 0.70y = 32.5
We substitute x = 50 - y in the equation
0.45(50 - y) + 0.70y = 32.5
= 22.5 - 0.45y + 0.70y = 32.5
= - 0.45y + 0.70y = 32.5 - 22.5
= 0.25y = 10
Divide both sides by 0.25
= y = 10/0.25
y = 40 liters
x = 50 - y
x = 50 - 40
x = 10 liters
Hence,
The number of liters of the 45% acid solution = 10 liters
The number of liters of the 70% acid solution is = 40 liters
Which equation below has no solution?
A) 3(6x + 8) = 24 + 18x
B) 8(x + 4) = 12x - 6
C) 5x - 4 = 2(4x + 8) - 3x
Answer:
B
Step-by-step explanation:
Help out hereeeeeeeeeeee
Answer:
C.
Step-by-step explanation:
A formula for finding the perimeter of a rectangle is P=2L +2W . if you know the perimeter (P) and the length (L) of a rectangle, which formula can you use to find the width (W)?
1. If mPCV = 42, then mZVCN =
Answer:
Easy lol mzvcn=48
Step-by-step explanation:
i need help with this ASAP
Answer:
There are sixteen 15-cent stamps and eight 20-cent stamps.
Step-by-step explanation:
Stamp collector has:
15c stamps
20c stamps
Total value is $4
x($0.15) + y($0.20) = $4.00
The # of 15c stamps is 8 - than 3 * the # of 20c stamps; 15c = 8 - 3c
x = 3y - 8
(3y-8)(0.15)+y(0.20) = $4.00
0.45)y-1.20+(0.20)y = 4.00
(0.65)y-1.20 = 4.00
(0.65)y = 5.20
y = 8
x = 3(8)-8 = 16
There are sixteen 15-cent stamps and eight 20-cent stamps.
Check:
16($0.15)+8($0.20) = $2.40+$1.60 = $4.00
Give triangle abc is congruent to triangle def find x
Answer:
x=9
Step-by-step explanation:
FE is 3x-7
since ΔABC≅ΔDEF the equivalent of FE is CB, or BC...which is 20
3x-7=20
3x=27
x=9
Help this is confusing
Answer:
A, 21
Step-by-step explanation:
84 divided by 3 = 28
28 per hour
3/4 of 28 is 21
The answer would be A. 21.
whats the slope for (-2,4) and (10, -2)
Answer:
-1/2
Step-by-step explanation:
y2-y1 over x2-x1
-2-4 over 10+2
which equals -6/12
which simplifies to -1/2
Answer:
-1/2
Step-by-step explanation:
Slope formula- m = y2 - y1
x2 - x1
x1,y1
-2, 4
x2,y2
10,-2 -2 - 4
10 - (-2) = -6/12 = -1/2
Which of the following terminating decimals is equivalent to Negative 1 and three-fourths?
Answer:
-1.75
Step-by-step explanation:
This should be it, but you didn't provide options although you put "Which of the following.."
Answer:
-1.75 thatis the answer thank you HAHAHAHAHAHA
Which of the following ordered pairs is a possible solution to the equation y = 3x - 2?
Answer:
D) (1,1)
Step-by-step explanation:
You can find the solution by plugging the x-value of each coordinate into the equation. It will be a solution if the y-value of the equation equals the y-value of the coordinate.
For example:
y = 3x -2
y = 3(1) - 2
y = 3-2
y = 1
1 = 1
(1, 1) are the coordinates that are on the given line.
What are coordinates?A pair of numbers called coordinates are used to locate a point or a form in a two-dimensional plane. The x-coordinate and the y-coordinate are two numbers that define a point's location on a 2D plane.
Given a equation y = 3x -2
To find which coordinates will satisfy the equation:
For coordinates (2, 0)
at x = 2, y should be zero
y = 3 * 2 -2
y = 4
Not satisfied
For coordinates(-3, 0)
at x = -3, y should be 0
y = 3 * -3 - 2
y = -9 -2
y = -11
Not satisfied
For coordinates(0, 2 )
at x = 0, y should be 2
y = 3*0 -2
y = -2
Not satisfied
For coordinates(1, 1)
at x = 1, y should be 1
Y = 3*1 - 2
y = 3 - 2
y = 1
satisfied
Therefore, (1, 1) are the coordinates that are on the given line.
Learn more about coordinates here:
https://brainly.com/question/20282507
#SPJ6
What is the equation of a line that passes through the points (3, 6) and (8, 4)?
Answer:
2x + 5y = 36 in standard form
Step-by-step explanation:
m = [tex]\frac{y_{2} -y_{1} }{x_{2} -x_{1} }[/tex]
y - [tex]y_{1}[/tex] = m( x - [tex]x_{1}[/tex] )
~~~~~
(3, 6)
(8, 4)
m = [tex]-\frac{2}{5}[/tex]
y - 6 = [tex]-\frac{2}{5}[/tex] ( x - 3 )
y = [tex]-\frac{2}{5}[/tex] x + [tex]\frac{36}{5}[/tex] in slope-intercept form
2x + 5y = 36 in standard form
Answer:
D.
Step-by-step explanation:
right on edge 2022
A room is an exclusive Dubai hotel costs $× pe4 night. The price then changes to $4370 per night after a decrease of 5% and a increase of 15%. Find ×
Answer:
The value of x is $4000.
Step-by-step explanation:
Let's call x to the original price per night of a room in the Dubai hotel.
The price first decreased by 5%. Calculate 5% of x:
5 * x / 100 = 0.05x
Now subtract it from the original price:
x - 0.05x = 0.95x
This new price is then increases 15%. Calculate 15% of 0.95x:
15 * 0.95x / 100 = 0.1425x
Add it to the previous price:
0.95x + 0.1425x = 1.0925x
This price is equal to $4370, thus:
1.0925x = 4370
x = 4370 / 1.0925
x = 4000
The value of x is $4000.
Tristán wants to build a square garden in his backyard if the garden is going to be 64 ft2 how many feet of material will he need for the perimeter of the garden
Answer:
Tristan will need 32 feet of material for the perimeter of the garden.
Step-by-step explanation:
Given that
Area of square garden = A = 64 square feet
Perimeter = P = ?
We know that for calculation of perimeter, length of side of square is required which is not directly given in the question. The area will be used to calculate length of side and then length will be used to calculate the perimeter.
So,
[tex]Area = A = s^2[/tex]
s is for side
Putting the value of area
[tex]64 = a^2[/tex]
Taking square root on both sides
[tex]\sqrt{s^2} = \sqrt{64}\\s = 8\ feet[/tex]
The length of side is 8 feet.
Perimeter will be:
[tex]P = 4*s\\P = 4*8\\P = 32\ feet[/tex]
Hence,
Tristan will need 32 feet of material for the perimeter of the garden.
Simplify completely:
Answer:
(3)¼×¾
Step-by-step explanation:
3⁴/⁴
hope its write
Answer:
[tex]\frac{13}{4}[/tex] · [tex]\frac{15}{4}[/tex]
Step-by-step explanation:
Focusing on the first fraction, in order to simplify it, you have to multiply the denominator by the whole number; 4 x 3 is 12. You add the product to the numerator, so 12 + 1 would be 13. Therefore, the first fraction simplified would be [tex]\frac{13}{4}[/tex].
We can apply the same procedure to the next fraction, so 3 x 4 is 12, and 12 + 3 is 15. [tex]\frac{15}{4}[/tex] would be your answer.
Hope this helps! :)
What is the volume of the box when x=3
Answer:
13
Step-by-step explanation:
Answer:
yes it is 13 i think
Step-by-step explanation:
lol i hope this is it
Cuál es el resultado de la suma de 12/3 + 3 1/2
Answer:
el resultado es facil es: 7 1/2 espero que te ayude
Answer:
7 1/2
Step-by-step explanation:
Find the measure of each angle (help me please)
Answer:
<1=39 degrees
<2=141 degrees
Step-by-step explanation:
Detailed ans is in attachment
hope it helps:)
plz mark as brainliest
Answer:
x-38+x+64=180(supplementry angle)
2x+26=180
2x=180-26
2x=154
x=154÷2
x=77
Again,1st angle
x-38
77-38
39
2nd angle,
x+64
77+64
141
in the figure below, m
Step-by-step explanation:
In figure below what???
Answer:
here is no pictures sorry
The function R(x) = -0.0065x² +0.23x + 8.47 models the American marriage rate R (the
number of marriages per 100 population) x years after 1960. Based on this function, in what
year was the marriage rate the highest? (Hint: The vertex of a parabola is the maximum or
minimum.)
please help
Given:
The American marriage rate R, x years after 1960 is defined by the function
[tex]R(x)=-0.0065x^2 +0.23x + 8.47[/tex]
To find:
The year in which the marriage rate is the highest.
Solution:
We have,
[tex]R(x)=-0.0065x^2 +0.23x + 8.47[/tex]
It is a quadratic function with negative leading coefficient. So, it is a downward parabola and vertex of downward parabola is maximum.
If a quadratic function is [tex]f(x)=ax^2+bx+c[/tex], then
[tex]Vertex=\left(\dfrac{-b}{2a},f(\dfrac{-b}{2a})\right)[/tex]
In the given function,
[tex]a=-0.0065,b=0.23,c=8.47[/tex]
Now, x-coordinate of vertex is
[tex]-\dfrac{b}{2a}=-\dfrac{0.23}{2(-0.0065)}[/tex]
[tex]-\dfrac{b}{2a}=-\dfrac{0.23}{-0.013}[/tex]
[tex]-\dfrac{b}{2a}\approx 17.69[/tex]
It means the marriage rate is highest after 17 years of 1960.
[tex]1960+17=1977[/tex]
Therefore, the marriage rate is highest in year 1977.
please please please help me
\(f(x) = \left\{
x + 4 x < 5
8 5 <_ x < 7
2x - 1 7 <_ x <_ 10
\right.\)
For f(x) evaluate the following
a. f(0)
b. F(6)
show all your work
Answer:
Answer: x = 0 and x = ±3. Solution: Write f(x) = g(x) h(x) ... us f (−4) ≈ 5,f (2) ≈ −7,f(0) ≈ 5,f(2) ≈ −8 and f(4) ≈ 6 which also agrees with.
Step-by-step explanation:
Answer: x = 0 and x = ±3. Solution: Write f(x) = g(x) h(x) ... us f (−4) ≈ 5,f (2) ≈ −7,f(0) ≈ 5,f(2) ≈ −8 and f(4) ≈ 6
And what you sed up there was just some words and simols so im prety sure rhis is it
Answer:
Bet.
Step-by-step explanation:
What kind of linear relationship can be represented using a table but not a function? Explain. (1 point)
O A horizontal line can be represented using a table but not a function because the slope is undefined
A vertical line can be represented using a table but not a function because the slope is undefined.
O A vertical line can be represented using a table but not a function because the slope is zero.
O A horizontal line can be represented using a table but not a function because the slope is zero
Answer:
The correct option is;
A vertical line can be represented using a table but not a function because the slope is undefined
Step-by-step explanation:
A function, f(x), representing a linear relationship can be presented as follows;
f(x) = m·x + c
Where;
m = The slope = Δy/Δx = (y₂ - y₁)/(x₂ - x₁)
c = The y-intercept
Whereby the line is a vertical line, x₂ = x₁ and x₂ - x₁ =
Therefore;
The slope of a vertical function, m = (y₂ - y₁)/(x₂ - x₁) = (y₂ - y₁)/0 = ∞ from which we have;
f(x) = ∞·x + c = ∞ which is undefined and the vertical line can only be represented using a table but not a function because the slope is undefined
Geneva already has $3.00 and earns $2.50 for each chore she completes. She wants to download an album on Apple Music which is at least $17. Write an inequality in terms of c (chores) that represents this situation.
Answer:
c ≤ 6
Step-by-step explanation:
Lets make our equation!
2.5 per chore thats our slope
+3 she starts with 3 dollars
y = 2.50x +3
Substitute y for 17!
17 = 2.5x +3
Subtract 3!
14 = 2.5x
Divide both sides by 2.5!
x = 5.6
5.6 --> 6
x = 6
Turn it into an inequality!
c ≤ 6
Consider Brainliest! Hope I helped!
8. If b(x) = -2(x-50), what is the value of
b(20)? Request
elbow said freewriting is an exercise in bringing together the process of producing words and putting them down on the page do you agree with his statement why why not
Answer:
No, his statement is incorrect.
Explanation:
Freewriting is to put thoughts onto a page as they come into your head without thinking too much about it.
5. A line has a slope of (-3/2) and a y-intercept of (-4). Write the equation of the line.
Explanation:
Answer:
Y=-3/2x-4
Step-by-step explanation:
Point slope form is
y=mx+b
mx is the slope
and b is the y-intercept
Which function translates each point on the graph of y=mx+b so that the slope of the segment from the original point to the translated point is 43?
Answer:
s(x)=32mx+b
Step-by-step explanation:
It should be this
please help due in 3 minutes
Answer:
k = $0.50
Step-by-step explanation:
The data that we have is:
Rocko paid: $12.50 for 25 tickets.
Louisa paid: $17.50 for 35 tickets.
Now, the question asks to find the constant of proportionality.
A proportional relation can be written as:
y = k*x
where k is the constant, and in this case, y is the price and x the number of tickets bought.
Then replacing with the values above, we have:
$12.50 = k*25
then:
k = $12.50/25 = $0.50
And the other data:
$17.50 = k*35
K = $17.50/35 = $0.50
So we have the same k in both cases, this means that the constant of proportionality is k = $0.50
i'm not all too familiar with the constant of proportionality, but both of the situations have a ratio of 0.5/1..
12.50/25 = 0.5/1
17.50/35 = 0.5/1
hopefully this can help you in some way! sorry if it doesn't
I need help. A building with a height of 48 m casts a shadow that is 30 m long. A person standing next to the building casts a shadow that is 0.8 m long. How tall is the person?
Answer:
1.28 m
Step-by-step explanation:
48/30 = x/.8
cross multiply
30x = 48(.8)
30x = 38.4
x = 38.4/30
x = 1.28 m
Answer for brainliest and 15 points
Answer:
1) C
2) O
3) P
4) T
5) I
6) C
7) P
8) S
9) A
10) L
11) T
12) E
13) L
Step-by-step explanation: