Answer:
Step-by-step explanation:
55*.60=$33
SO, 55-33=22THE ITEM IS $22 NOW
In a lab, a substance was cooled by 36°C over a period of 9 hours at a constant rate. What was the change in temperature each hour?
The substance was cooling down at a constant rate of 4 degrees Celsius per hour throughout the 9-hour period in the lab.
In this lab scenario, we are given that a substance was cooled by 36°C over a period of 9 hours at a constant rate. Let's denote the change in temperature as ΔT (Delta T) and the time interval as Δt (Delta t) in hours.
To find the change in temperature each hour, we can use the formula for the rate of change of temperature:
ΔT/Δt = Rate of change of temperature
Given that the total change in temperature (ΔT) is 36°C and the total time period (Δt) is 9 hours, we can now plug these values into the formula:
ΔT/Δt = 36°C / 9 hours
Simplifying this, we get:
ΔT/Δt = 4°C/hour
So, the change in temperature each hour, represented as ΔT/Δt, is 4°C. This means that the substance was cooling down at a constant rate of 4 degrees Celsius per hour throughout the 9-hour period in the lab.
To know more about Temperature here
https://brainly.com/question/32445661
#SPJ2
P=3L-3W solve for L (literal equation)
P=3L-3W
Move -3W to the other side. Sign changes to +3W
P+3W=3L-3W+3W
P+3W=3L
Divide both sides by 3 to get L by itself
P/3+3W/3=3L/3
Cross out 3 and 3, divide by 3 and then becomes 1*1*W=W
Cross out 3 and 3, divide by 3 and then becomes 1*1*L=L
P/3+W=L
Answer:
L=P/3+W
A bag contains 22 1/2 cups .A recipe for pancakes uses 1 1/4 cups of flour .how many batches of pancakes can be made with one bag of flour
Answer:
18 batches of pancakes
Step-by-step explanation:
22.5/1.25=18
Mary weighs n kg while her sister weighs 15 kg less. How many times is Mary heavier than her sister?
For this case we have to:
n: Represents the weight of Mary in Kg.
If your sister weighs 15 kg less we have:
[tex]y = n-15[/tex]
Where "y" represents the weight of his sister in kg.
To find how many times Mary is heavier than her sister, we must divide Mary's weight by her sister's weight.
We have then:
[tex]N= \frac{n}{n-15}[/tex]
Answer:
Mary is [tex]N= \frac{n}{n-15}[/tex] times heavier than her sister.
Answer:
Mary weighs[tex]\frac{n}{(n-15)}[/tex]heavier than her sister.
Explanation:
As we have given the data in the question that
Weight of marry = n kg
Weight of Marry sister = n-15 kg
Let Marry be ‘K' times heavier than her sister then it means that
K=[tex]\frac{n}{(n-15)}[/tex]
And we can write the above equation as
K(n-15) = n
K=[tex]\frac{n}{(n-15)}[/tex]
which completely explains the above statement that Weight of the marry is K times the weight of her sister.
So the correct answer is K=[tex]\frac{n}{(n-15)}[/tex]
-23=5+ 4x what does x equals?
Answer:
x = -7
Step-by-step explanation:
- 23 = 5 + 4x
- 5 = - 5
- 28 = 4x
/4 = /4
- 7 = x
Answer: x= -7
Step-by-step explanation:
you basically add 5 with 5 and they cancel out
You add 5 to -23 and get -28=4x and divide 4x and -28 which gets your answer
If f(x) = х2 – 2x and g(x) = 6х +4, for which vаluе оf x does (f + g)(x) = 0?
Answer:
x = - 2
Step-by-step explanation:
(f + g)(x) = f(x) + g(x)
f(x) + g(x) = x² - 2x + 6x + 4 = x² + 4x + 4
Equating to zero, that is
x² + 4x + 4 = 0 ← left side is a perfect square
(x + 2)² = 0, thus
x + 2 = 0 ⇒ x = - 2
Answer:
[tex]\boxed{\text{x = -2}}[/tex]
Step-by-step explanation:
ƒ(x) = x² - 2x
g(x) = 6x + 4
(f + g)(x) = x² - 2x + 6x + 4 = x² + 4x + 4
[tex]\begin{array}{rcr}x^{2} + 4x + 4 & = & 0\\(x + 2)^{2} & = & 0\\x+2 & = & 0\\x & = & \mathbf{-2}\\\end{array}[/tex]
[tex](f + g)(x) = 0 \text{ when } \boxed{\textbf{x = -2}}[/tex]
Check:
[tex]\begin{array}{rcl}(-2)^{2} + 4(-2) + 4 & = & 0\\4 - 8 + 4 & = & 0\\0 & = & 0\\\end{array}[/tex]
OK.
Solve the equation 5x + 7y = 35 for y.
Answer:
B. [tex]y= 5 - \frac{5}{7} x[/tex]
Step-by-step explanation:
okay, so you are trying to get y alone on one side. The first thing you want to do is try to get 7y alone on one side. You do that my subtracting 5x on both sides. You get 7y = 5x +35
Then you divide 7 on both sides and get y = -5/7x + 5
The equation 5x + 7y = 35, when solved for y, is y = (35 - 5x) / 7.
The correct option is B.
To solve the equation 5x + 7y = 35 for y, we need to isolate y on one side of the equation.
Let's begin by subtracting 5x from both sides:
5x + 7y - 5x = 35 - 5x
The 5x terms cancel out on the left side, leaving us with:
7y = 35 - 5x
Now, to isolate y, we divide both sides of the equation by 7:
(7y) / 7 = (35 - 5x) / 7
Simplifying further, we have:
y = (35 - 5x) / 7
Therefore, the equation 5x + 7y = 35, when solved for y, is y = (35 - 5x) / 7.
Learn more about Equation here:
https://brainly.com/question/29657983
#SPJ2
After several shares of the company's stock were sold, a profit of $1,320 was earned. The profit was 15% over a 30 day period. How much were the shares worth when they were originally purchased?
Answer:
That's it... Just sum it ul
Answer:
The shares were worth $8800, when they were originally purchased.
Step-by-step explanation:
After several shares of the company's stock were sold, a profit of $1,320 was earned.
The profit was 15% over a 30 day period.
Let the original price of the shares be = x
As there was a profit of 15% on x.
We get the following expression;
[tex]0.15x=1320[/tex]
Then x = 8800
Hence, the shares were worth $8800, when they were originally purchased.
Solve a Mixture Word Problem
Question
Orlando is mixing nuts and cereal squares to make a party mix. Nuts sell for $7 a pound and cereal squares sell for $4 a
pound. If Orlando wants to make 30 pounds of party mix at a cost of $6.50 a pound, how many pounds of nuts and how
many pounds of cereal squares should he use?
Provide your answer below:
lb cereal squares,
Ib nuts
B FEEDBACK
MORE INSTRUCTION
SUBMIT
Content attribution
Answer: Orlando mixed five pounds of cereal squares and 25 pounds of nuts.
Answer:
5 lbs cereal squares.
25 Ibs nuts.
Step-by-step explanation:
Let x be the weight of nuts in pounds and y be the weight of cereal squares in pounds.
Total weight of the party mix is 30 pounds.
[tex]x+y=30[/tex] ..... (1)
It is given that,
Cost of nuts = $7 per pound
Cost of cereal = $4 per pound
The cost of mix = $6.50 per pound.
[tex]7x+4y=6.50\times 30[/tex]
[tex]7x+4y=195[/tex] ..... (2)
Substitute the value of x in equation (2) from equation (1).
[tex]7(30-y)+4y=195[/tex]
[tex]210-7y+4y=195[/tex]
[tex]-3y=195-210[/tex]
[tex]-3y=-15[/tex]
Divide both sides by -3.
[tex]y=5[/tex]
Substitute y=5 in equation (1).
[tex]x+5=30[/tex]
Subtract both sides by 5.
[tex]x=30-5[/tex]
[tex]x=25[/tex]
Therefore, he use 25 lbs of nuts and 5 lbs cereal squares for party mix.
estimate the square root of 27 over 4 to the nearest 10th
Answer:
1.3
Step-by-step explanation:
What is the answer to this question? Simplify:
Answer:
19
Step-by-step explanation:
15-(-36/9)
15 + 4
19
Answer:
11
Step-by-step explanation:
36/-9 can be reduced to -4
15--(-4) is the same as 15+(-4) which is the same as 15-4
15-4=11
2. On a recent field trip, students paid $15 for
each ticket. If $675 is the total cost, how many
tickets were purchased?
a. Write an equation:
b. What is the constant of proportionality?
Answer:
See below.
Step-by-step explanation:
Cost of tickets = number of tickets * cost of 1 ticket
The number of tickets purchased was 675/15 = 45.
a. C = 15n .
b. Constant of proportionality is 15.
Answer: $675 + $15 =
Step-by-step explanation:
first add the 5 and 5 together drop the zero carry the one then add 1 and 7 plus 1 which is 9 then add 6 plus zero and ur answer should be 690
There are 52 weeks in one year. If cindy drew three pictures each week, for 2 years, how many pictures did cindy draw?
Final answer:
Cindy drew a total of 312 pictures over two years, calculating from three pictures per week for 52 weeks each year, then doubling the result for the two years.
Explanation:
To calculate the total number of pictures Cindy drew over two years, we start by determining the number of pictures she draws each week.
Since Cindy draws three pictures each week, we multiply that number by the number of weeks in one year.
There are 52 weeks in one year.
So, the number of pictures Cindy draws in one year is:
3 pictures/week × 52 weeks/year = 156 pictures/yearSince the question is about a two-year period, we multiply the annual amount of pictures by two:
156 pictures/year × 2 years = 312 picturesTherefore, Cindy drew a total of 312 pictures over two years.
PLEASE HELP!
Given triangle ABC with vertices A(−3, 0), B(0, 6), and C(4, 6). Find the equations of the three medians of triangle ABC
Answer:
y= -7/6x+6
y= -1/2x+8
x = -3
Step-by-step explanation:
Find the slope of the lines of the triangle. Then you can find the perpendicular slope of that (the slope of the altitudes) by inversing it and switching the = or - sign. Then you have a point the altitude goes through (one of the vertices) and the slope. Then you can make the equation.
5•(9+4)+362 divided by 2
Answer:
2`13.5
Step-by-step explanation:
5x13=65
65+362=427
427/2=213.5
Step-by-step explanation: everything can be divided by 2 and added together. Or distribute 5. Add them. Then divide by 2
Find the slope of the line passing through the
points
(-9, 2) and (7,2)
Answer:
0
Step-by-step explanation:
-y₁ + y₂\-x₁ + x₂ = m
[tex] \frac{ - 2 + 2}{9 + 7} = \frac{0}{16} = 0[/tex]
I am joyous to assist you anytime.
---
Nathaniel started collecting rocks. He started his collection with two rocks on the first day, then four rocks on the second day, then
elght rocks on the third day, and then sixteen rocks on the fourth day.
Assuming this pattern continues, what will be the total size of Nathaniel's rock collection on the 10th day?
Answer:
Step-by-step explanation:
u keep multiplying see 2*2= 4*4=16*16=256*256=65536*65536= etc
Answer:
plato: 1,024
Step-by-step explanation:
The given line passes through the points (0, ) and (2, 3). On a coordinate plane, a line goes through (0, negative 3) and (2, 3). A point is at (negative 1, negative 1). What is the equation, in point-slope form, of the line that is parallel to the given line and passes through the point ()?
Option 2 is correct.
[tex]\[ y = \frac{1}{5}x + \frac{12}{5} \][/tex]
To find the equation of a line that is parallel to the given line and passes through the point (-2, 2), we follow these steps:
1. Determine the slope of the given line. Parallel lines have the same slope.
2. Use the point-slope form of a line equation with the given point and the determined slope to find the equation of the parallel line.
From the graph, we can see that the given line passes through points (0, -3) and (-5, -4). To find the slope (m) of the line, we use the slope formula:
[tex]\[ m = \frac{y_2 - y_1}{x_2 - x_1} \][/tex]
Substituting the given points, we get:
[tex]\[ m = \frac{-4 - (-3)}{-5 - 0} \][/tex]
[tex]\[ m = \frac{-4 + 3}{-5} \][/tex]
[tex]\[ m = \frac{-1}{-5} \][/tex]
[tex]\[ m = \frac{1}{5} \][/tex]
Now we have the slope of the parallel line, which is[tex]\( \frac{1}{5} \)[/tex]. The point-slope form of the line equation is [tex]\( y - y_1 = m(x - x_1) \)[/tex]. Plugging in the slope and the point (-2, 2), we get:
[tex]\[ y - 2 = \frac{1}{5}(x - (-2)) \][/tex]
[tex]\[ y - 2 = \frac{1}{5}(x + 2) \][/tex]
Now we simplify and solve for y to put it in slope-intercept form ( y = mx + b ):
[tex]\[ y - 2 = \frac{1}{5}x + \frac{2}{5} \][/tex]
[tex]\[ y = \frac{1}{5}x + \frac{2}{5} + 2 \][/tex]
[tex]\[ y = \frac{1}{5}x + \frac{2}{5} + \frac{10}{5} \][/tex]
[tex]\[ y = \frac{1}{5}x + \frac{12}{5} \][/tex]
So the equation of the line that is parallel to the given line and passes through the point (-2, 2) is:
[tex]\[ y = \frac{1}{5}x + \frac{12}{5} \][/tex]
What is 6.02 nearest tenth
Answer:
6
Step-by-step explanation:
The digit in the hundredth place value of 6.02 is 2, so it rounds down.
The number 6.02, when rounded to the nearest tenth, results in 6.0, as '2' in the hundredths place is less than '5' and requires rounding down.
Explanation:Given the number 6.02, rounding to the nearest tenth means identifying what tenth it is closest to. The number in the tenths place is '0'. For rounding, we look at the digit following the tenths place, which is the hundredths place. Here, the number is '2'. If this number is 5 or more, we round up. If it's 4 or less, we round down. So, 6.02 to the nearest tenth, would be 6.0 because 2 is less than 5, so we round down.
Learn more about Rounding Numbers here:https://brainly.com/question/19166897
#SPJ2
25 000,000/10,000
No calculator
25 000,000/10,000
Cross out equal amounts of 0's from both numbers:
There are 4 0's in 10,000, so remove 4 0's from both numbers to get:
2500/1
Any number over 1 is that number:
2500/1 = 2500
a. Un equipo de tenis de mesa ganó 21 juegos y perdió 12 juegos, ¿cuál es la razón entre ganados y perdidos?
Answer:
The ratio between won and lost is [tex]\frac{7}{4}[/tex]
Step-by-step explanation:
The question in English is
A table tennis team won 21 games and lost 12 games, what is the ratio between won and lost?
Let
x ------> the number of games won
y -----> the number of games lost
we have
[tex]x=21\ games[/tex]
[tex]y=12\ games[/tex]
we know that
To find the ratio divide the number of games won by the number of games lost
so
[tex]\frac{x}{y}[/tex]
substitute the values
[tex]\frac{21}{12}[/tex]
Simplify
[tex]\frac{7}{4}[/tex]
Preserve
What is this 3 digit number
Is my student correct?
Answer:
Yes
Step-by-step explanation:
There hasn't been a chemical change, rather, just a physical change. All that had happened was a liquid turning into a solid, which doesn't require a change in elements of the liquid itself.
Answer:
YES
Step-by-step explanation:
BECAUSE A CHEMICAL CHANGE STAYS THE SAME AND A PHYSICAL CHANGE CAN GO BACK TO NORMAL
123456789
What is the perimeter of a rectangle that has a 3ft hight and 13ft width
Answer:
32 ft
Step-by-step explanation:
3+3+13+13=
32
Perimeter = 32 ft.
Since it is a rectangle, 2 sides measure 13ft, and 2 sides measure 3 ft.
13+13=26
3+3=6
26+6=32.
What is 2/28=7/8 cross multiplied
Answer:
see the explanation
Step-by-step explanation:
we have
[tex]\frac{2}{28}=\frac{7}{8}[/tex]
we know that
To cross multiply, start by multiplying the numerator of the left-hand fraction by the denominator of the right-hand fraction.
2(8)
Then, multiply the numerator of the right-hand fraction by the denominator of the left-hand fraction.
7(28)
Next, set the 2 products equal to each other.
2(8)=7(28)
What power of 10 can you multiply 0.02 by to get a product of 20?
Answer:
10^{3\\}
Step-by-step explanation:
10x10x10x0.02
=20
Have a nice day!!!!
KA
How can you solve for x in the proportion 7/8 = x/24?
Set the sum of 7 and 8 equal to the sum of 24 and x, and then solve for x.
Set the sum of 7 and 24 equal to the sum of 8 and x, and then solve for x.
Set the product of 7 and 8 equal to the product of 24 and x, and then solve for x.
Set the product of 7 and 24 equal to the product of 8 and x, and then solve for x.
Answer:
The answer is D
Step-by-step explanation:
Flower: Anthony decides to decorate a ballroom with r= 3n + 20 roses, where n is the number of dancers. It occurs to Anthony that the dancers always come in pairs. That is, n=2p, where p is the number of pairs. What is r as a function of p?
Can anyone explain the process of how to answer this problem?
Answer:
r= 6p + 20
Step-by-step explanation:
given:
r= 3n + 20
also given that n = 2p
substituting n=2p into the above equation
r= 3n + 20
r= 3(2p) + 20
r= 6p + 20
What is the solution for the equation 8X – 12 = 4x?
x= 48
x= 30
x=3
X=1
Answer:
C. x = 3
Step-by-step explanation:
8x - 12 = 4x
+12 + 12
8x = 4x + 12
-4x -4x
4x = 12
---- ---
4 4
x = 3
C. x = 3
8x-12= 4x
move -12 to the other side
sign changes from -12 to +12
8x-12+12= 4x+12
8x=4x+12
move 4x to the other side.
sign changes from +4x to -4x
8x-4x= 4x-4x+12
8x-4x= 12
4x=12
divide both sides by 4 to get x by itself
4x/4= 12/4
Answer: x= 3
What is the procedure for solving the equation 1/2x = 16?
a) add 1/2 to both sides of the equation
b) subtract 1/2 from both sides of the equation
c) multiply both sides of the equation by 2
d) multiply both sides of the equation by 1/2