Answer: I got
-4.4c+1.1
Answer:
-4.4c+1.1
Step-by-step explanation:
5-10x+4 need help please
Answer:
-10x+9
Step-by-step explanation:
Brittany and Cydney are each thinking of a number. Cydney’s number is 4/9 of Brittany’s number. There is a difference of 80 between their two numbers? What is each number?
Answer:
Brittany number is 144
Cydney number is 64
Step-by-step explanation:
let Brittany number be x
let Cydney number be y
y=4/9x
x - y = 80 because x is more than y
so y=x - 80
x - 80 = 4/9x
5/9x=80
x=720/5=144
y=64
a student spelled 92% of the words on a spelling test correctly. If the test had 25 questions, how many words did the student spell correctly
Answer:
23
Step-by-step explanation:
25*92%=23
answer:
I guess its 23
description:
A hubcap has a radius of 11 centimeters. What is the area of the hubcap? Round your answer to the nearest hundredth. Use 3.14 for π.
Answer:
379.94 cm 2
Step-by-step explanation:
A certain radioactive material is known to decay at a rate proportional to the amount present. If initially there is 50 mg/L of the material present and after 2 hours it is observed that the material has lost 10 percent of its original concentration, find (a) an expression for the concentration of the material remaining at any time.
Answer:
[tex]Q(t) = 50e^{-0.0527t}[/tex]
Step-by-step explanation:
A certain radioactive material is known to decay at a rate proportional to the amount present.
This means that the situation can be described by the following differential equation:
[tex]\frac{dQ}{dt} = -rQ[/tex]
In which r is the decay rate.
Solving the differential equation by separation of variables, we have that:
[tex]\frac{dQ}{Q} = -r dt[/tex]
Integrating both sides:
[tex]\ln{Q} = -rt + K[/tex]
In which K is the integrative constant.
Applying the exponential to both sides, to remove the ln, we get:
[tex]Q(t) = Ke^{-rt}[/tex]
In which K is the initial amount present.
Initially there is 50 mg/L
This means that [tex]K = 50[/tex].
After 2 hours it is observed that the material has lost 10 percent of its original concentration
This means that [tex]Q(2) = 0.9K[/tex]. So
[tex]0.9K = Ke^{-2r}[/tex]
[tex]e^{-2r} = 0.9[/tex]
[tex]\ln{e^{-2r}} = \ln{0.9}[/tex]
[tex]-2r = \ln{0.9}[/tex]
[tex]r = -\frac{\ln{0.9}}{2}[/tex]
[tex]r = 0.0527[/tex]
So
[tex]Q(t) = Ke^{-rt}[/tex]
[tex]Q(t) = 50e^{-0.0527t}[/tex]
What is the difference of 716−358?
Simplify
[4 (2+3)]? – 5 (30 – 10)
Answer:
-80 (showed below)
Step-by-step explanation:
given: [4 (2+3)]? – 5 (30 – 10)
brackets: 4 (5)]? – 5 (20)
mutiply: 20 - 100
= -80
11 Joel says, "For x 20, the expression
[tex]( \sqrt[7]{ {x}^{2} })( \sqrt[5]{ {x}^{3} } [/tex]
equivalent to
[tex]( \sqrt[35]{ {x}^{6} } [/tex]
is he correct? Justify your response algebraically.
Answer:
no justified
Step-by-step explanation:
Hi! what's The GCF of 10a-25+5b ? thank you! <3
Answer:
GCF = 5
Step-by-step explanation:
Answer: 5
Step-by-step explanation: try using a site called math, way for questions like this, hope it helps :)
3/4 + 2/8 =
I need help
Answer:
1
Step-by-step explanation:
3/4 + 2/8 =
First you need to find a common denominator, and in this case, it can be 4
2/8 = 1/4 ( i divided the numerator and denominator by 2)
3/4 + 1/4 = 4/4 = 1
Check
4/4 - 3/4 = 1/4
4/4 - 1/4 = 3/4
Correct!
Hope this helped!
Have a supercalifragilisticexpialidocious day!
Given Rectangle RECT. If angle REA= (2y+7) degrees and angle CEA = (3y-2) degrees, determine each of the following:
a) the value of y
b) the measure of angle RTA
Answer:
a) y=17
b) m<RTA=49°
Step-by-step explanation:
3y-2+2y+7=90
5y+5=90
5y=85
y=17
m<RTA = m<CEA = 3(17)-2=49
3[10(4^{2} -6+3)] please help!!
Answer:
471
Step-by-step explanation:
Do what is powered first, and then PEMDAS ( parenthesis, exponents, multiplication, division, addition, subtraction).
It would be 3[10(16) - 6 + 3)] because 4 squared is 16. Next, do the multiplication inside of the brackets, which is 10(16), and that equals 160. Then, finish the math from left to right IN THE BRACKETS do NOT multiply by 3 yet. 160 - 6 + 3 = 157. Now, multiply 3(157), and that equals 471.
Sorry for all caps. People seem to mess up the PEMDAS order a lot, so I'm just trying to make it clear.
If y varies directly as the square of x and Y = -54 when x = 9, then Y = -1
when x = 6
3
Please select the best answer from the choices provided
True
False
Answer: false
Step-by-step explanation:
i just took the quiz and made a 60 so pls don’t be like me and fail it ;-;
Pleaseeeeee helppppppp
Answer:
8 x 3 = 24 divided by 2 is 12
Step-by-step explanation:
Answer:
12
Step-by-step explanation:
1/2bh is the formula for a triangle
so 8 * 3 is 24
24/2
12
What is 26 divided by 7=
Answer:
3.714
Step-by-step explanation:
because you divide
26 divided by 7 is equal to 3, with a remainder of 5. In mathematical notation, it can write it as 26 ÷ 7 = 3 R 5.
The division is given as:
26 ÷ 7
To determine this, we start by dividing the first digit of 26, which is 2, by 7. Since 2 is less than 7, we carry down the next digit, which is 6, and consider it as part of the dividend.
Now, we have 26 as our new dividend.
We divide 7 into 26, and it goes 3 times (7 × 3 = 21). We subtract 21 from 26, which leaves us with a remainder of 5.
Therefore, 26 divided by 7 is equal to 3, with a remainder of 5. In mathematical notation, we can write it as 26 ÷ 7 = 3 R 5.
The quotient 3 represents the whole number of times 7 can be divided into 26, and the remainder 5 indicates the extra amount that is left over.
To learn more about the division operation click here :
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A Statistics class has an enrollment of 300. Out of these, 95 are taking the Actuarial Statistics major, 120 are Data Science majors, 80 are Financial Math majors and 5 are Undecided. Find the probability that a student in the class chosen at random is neither an Actuarial Statistics nor a Data Science major
Answer:
0.2833 = 28.33% probability that a student in the class chosen at random is neither an Actuarial Statistics nor a Data Science major
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
In this question, we have that:
There are 300 students.
80 + 5 = 85 are not Actuarial statistics or data science majors. So
[tex]\frac{85}{300} = 0.2833[/tex]
0.2833 = 28.33% probability that a student in the class chosen at random is neither an Actuarial Statistics nor a Data Science major
this a correlation type of questions it looks so confusing
equivalent this problem -3(4 – 2g) – 6?
Answer:
-12 + 6g - 6
Step-by-step explanation:
The radius of a circle is 17 m. Find its circumference in terms of 
Pi
Answer:
C≈106.81m
radius= 17m
Step-by-step explanation:
Fill the missing number.
8 6/7-5 1/2=3+?
What is the image of the point (-5,6) after a rotation of 90° counterclockwise about
the origin?
Answer:
(-6;5)
Step-by-step explanation:
if they are asking about where it is going to be situated in the coordinate system after the rotation
An arithmetic series is represented by the equation S24 = 2-6+058. Which of the following is true?
Will name Brainlyest
Answer:C. The value of the series is equal to the value of the 1st or 24th numbers in the series.
Step-by-step explanation:
The given series is .
To find the first term of this series, we substitute k=1 to obtain:
To find the 24th term of the series, we put k=24 to get:
The value of the series is the sum of all the terms in the series.
We can find the value of the series using the formula:
.
In this case, the last term is .
.
.
.
Now let us analyse the options:
A. The value of the series is greater than the value of the 24th number in the series.
False: because 6 is not greater than 6.
B. The value of the series is between the values of the 1st and 24th numbers in the series.
False: because 6 is not between -5.5 and 6
C. The value of the series is equal to the value of the 1st or 24th numbers in the series.
True: In logics, an "or" statement (disjunction) is true if one of the alternatives is true. In this case the sum of the series is equal to the 24th number of the series because 6=6 is true
D. The value of the series is less than the value of the 1st number in the series.
False: because 6 is not less than -5.5
Step-by-step explanation:
Find the next 3 terms of the geometric sequence. Put commas between each number but no spaces Ex: 1,2,3. 5, 10, 20, 40, ... *
Answer:
80, 160, 320
Step-by-step explanation:
You can see that each time you multiply the previous number by 2.
Answer:
Step-by-step explanation:
for the sequence 5,10,20,40,
the next three terms are 80,160,320
In a rotation, the pre-image and image will stay
Answer:
Rotation" means turning around a center. The distance from the center to any point on the shape stays the same. Every point makes a circle around the center. In a rotation, the Preimage and Image are the same size
Step-by-step explanation:
Answer:
i don't understand
Step-by-step explanation:
can you put the rest of the question in the ch,at or something so i can answer the question easyer
A geometric transformation is described algebraically as shown below.
(x, y) - (3x, 3y)
Which of these best describes this transformation?
O a translation 3 units down and 3 units to the left
O a 180° degree rotation centered at the point (3, 3)
O a translation 3 units up and 3 units to the right
O a dilation with scale factor 3 centered at the origin
(x, y) - (3x, 3y) describes a dilation with scale factor 3 centered at the origin.
What is Graph?Graph is a mathematical representation of a network and it describes the relationship between lines and points.
Graph transformation is the process by which a graph is modified to give a variation of the proceeding graph.
The graphs can be translated or moved about the xy-plane.
A dilation is a transformation which preserves the shape and orientation of the figure, but changes its size.
The scale factor of a dilation is the factor by which each linear measure of the figure is multiplied.
The 3 is multiplied to both the xy axis.
S0 the 3 is a scale factor.
(x, y is ) - (3x, 3y) a dilation with scale factor 3 centered at the origin
Hence, (x, y) - (3x, 3y) describes a dilation with scale factor 3 centered at the origin.
To learn more on Graph click:
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Translate the follow expression (use x as variable)
13 more than one-third of x
Answer:
1/3x + 13
Step-by-step explanation:
one-third of x is 1 divided by 3 times x. 13 more means plus 13.
Are these triangles similar. Explain
Answer:
No, they might kind of look the same but they have different height and legnth.
Step-by-step explanation:
Answer:
yes because they are both acute triangles
Our swimming pool is 3 times as long as it is wide. If the perimeter of our pool is 48 feet, what is its width and length? Let w=width.
Answer:
width= 4 ft
length= 12 ft
Step-by-step explanation:
? x 3= ?
4 x 3= 12
12 x 4= 48
On a surface you have 200,000 bacteria
You use Clorox, which kills 99.9% of germs
How many germs are left? (MATH QUESTION)
Answer:
200
Step-by-step explanation:
Tell me the least integer in the pair down below
1) -3 or +5
Please do this quick and tell me why is that the answer for extra points. Please help me due in 5 minutes please do it correct with steps or telling me how u got the answer Pleaseeeee do this quick
Answer:
The smallest integer in the pair is -3
Step-by-step explanation:
One way to figure this out is by looking at if it is positive or negative. In this case, -3 has a negative sign, so it is smaller
Therefore, it is -3
Hope this helps :)
