it's a I know this because I'm in the 8th
Step-by-step explanation:
it's a
Help ASAP!!!Find the value of x and y
Answer:
x = 39
y = 39
since the sides are congruent the angles are also equal.
fy=x-4
Solve: 0
W = 6x – 10
So x=6/5 and y=-2.8
place the values of x on the equation and you will find y as -2.8
Radioactive Decay:
The half life of a
certain radioactive
substance is 46 days.
There are 12.6 g
present initally.
HELP PLS
The question is incomplete, here is the complete question:
The half-life of a certain radioactive substance is 46 days. There are 12.6 g present initially.
When will there be less than 1 g remaining?
Answer: The time required for a radioactive substance to remain less than 1 gram is 168.27 days.
Step-by-step explanation:
All radioactive decay processes follow first order reaction.
To calculate the rate constant by given half life of the reaction, we use the equation:
[tex]k=\frac{0.693}{t_{1/2}}[/tex]
where,
[tex]t_{1/2}[/tex] = half life period of the reaction = 46 days
k = rate constant = ?
Putting values in above equation, we get:
[tex]k=\frac{0.693}{46days}\\\\k=0.01506days^{-1}[/tex]
The formula used to calculate the time period for a first order reaction follows:
[tex]t=\frac{2.303}{k}\log \frac{a}{(a-x)}[/tex]
where,
k = rate constant = [tex]0.01506days^{-1}[/tex]
t = time period = ? days
a = initial concentration of the reactant = 12.6 g
a - x = concentration of reactant left after time 't' = 1 g
Putting values in above equation, we get:
[tex]t=\frac{2.303}{0.01506days^{-1}}\log \frac{12.6g}{1g}\\\\t=168.27days[/tex]
Hence, the time required for a radioactive substance to remain less than 1 gram is 168.27 days.
PLS HELP DUE SOON!!! FOR 16 points!!!!
Answer:
D.
Step-by-step explanation:
To find the mean you add all the numbers together then divide by the total of number so 5
Lin has a scale model of a modern train. The model is created at a scale of 1 to 48. On the scale model, the distance between the wheels on the left and the wheels on the right is 1 1/4 inches. The state of Wyoming has old railroad tracks that are 4.5 feet apart. Can the modern train travel on these tracks?
No, modern train cannot travel on old railroad.
Step-by-step explanation:
In rail transport, track gauge is the spacing of the rails on a railway track and is measured between the inner faces of the load-bearing rails.
Most of the modern train are based on broad gauge. The separation in broad gauge is about 5 ft and 6 inches and in the standard gauge the separation between the tracks is 4 ft and inches. So for the modern train it is not possible to travel on the tracks whose separation is no more than 4.5 feet.
Calculate the value of this expression by writing the decimal factors as fractions, then writing their product as a decimal. Show your reasoning. (0.01)⋅(0.02) this is 6th grade math
Answer:
0.0002
Step-by-step explanation:
Answer:
0.0002
Step-by-step explanation:
Which expressions are equivalent to
In x + 2 In 5 + In 1?
Answer:
ln(25x)
Step-by-step explanation:
ln(x) + 2ln(5)+ln(1) = ln(x) + ln(5^2) + ln(1)
= ln(x*5^2*1) = ln(25x)
any hellllllllp please
write without exponents
Answer:
(2y * 2y) * (2y * 2y) * (2y * 2y)
Step-by-step explanation:
I GIVEEEEEEE BRAINLILSTTT
Answer:
F= (0,5)
G=(10,5)
H=(0,0)
Answer:
OK READY
78329814634803265r36+++++====== wduyiewqbd73892dbd
Step-by-step explanation:
your welcome
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Drag the numbers to the correct locations on the image. Not all numbers will be used.
Complete the synthetic division to find the quotient of and .
Answer:
First Column: 8
Third Column: 24
Fourth Column: 4
Fifth Column (from top to bottom): 32; 0
This means that:
[tex](3x^3-25x^2+12x-32)\div (x-8)=3x^2-x+4[/tex]
Step-by-step explanation:
We can perform synthetic division when we divide a polynomial P(x) by a binomial in the form of (x - a).
When doing so, the number that goes to the very left of our structure will be the constant a.
We fill the first row with the coefficients of each term.
We are dividing [tex]3x^3-25x^2+12x-32[/tex] by [tex]x-8[/tex].
So, a = 8.
Therefore, for the first column, the number there is 8.
The second column has been filled out.
For the third column, we multiply the previous number by our a.
The previous number is 3. 3(8) is 24.
So, the number in the third column is 24.
(And we add 24 to -25 to acquire -1).
So, for the fourth column, we will add the two numbers to acquire (12 - 8) = 4.
Hence, the number for the fourth column is 4.
For the fifth column, the top box, it will again be the previous number multiplied by our a.
The previous number is 4. 4(8) is 32.
So, the number in the top box of the fifth column is 32.
And when added to -32, it equates to 0. Hence, the second box of the fifth column is 0.
This means that:
[tex](3x^3-25x^2+12x-32)\div (x-8)=3x^2-x+4[/tex]
Answer:
[tex] \frac{(3 {x}^{3} - 25 {x}^{2} + 12x - 32)}{(x - 8)} = (3 {x}^{2} - x + 4)\\[/tex]
Do this work If one do I will make brainliest her or him please
Answer:
If you need the explanation, just ask.
|-x-2y| x-12 y=8
a= 4
b= 8
c= -4
d= -8
Answer:
b
Step-by-step explanation:
Alex purchases a big screen TV, pays 7% state sales tax,
and is charged $65 for delivery. If Alex's total cost is
$1,668.93, what was the purchase price of the TV?
Answer:
$1489.10
Step-by-step explanation:
1668.93 x 0.07 - 65
Tax = 116.83
1668.93 - 116.83 - 63
Answer = $1489.10
There are 3 consecutive odd integers that have a sum of 9.
Answer:
1+3+5
Step-by-step explanation:
I think
The amount of revenue in dollars, y, that Makayla receives from selling x posters is given by the equation y = 3x. The cost of producing x posters is given by the equation y = LaTeX: \frac{1}{3}x\:+\:2001 3 x + 200. How many posters does Makayla need to sell so that the cost and revenue are equal?
Group of answer choices
Answer:
75 posters
Step-by-step explanation:
Given
[tex]y = 3x[/tex] ---- Revenue
[tex]y = \frac{x}{3} + 200[/tex] --Cost of production
Required
Determine the number of posters that when cost equals revenue
To do this, we simply equate both equations
i.e. [tex]3x = \frac{x}{3} + 200[/tex]
Collect like terms.
[tex]3x - \frac{x}{3} = 200[/tex]
Multiply through by 3
[tex]3(3x - \frac{x}{3}) = 200*3[/tex]
[tex]9x - x = 600[/tex]
[tex]8x = 600[/tex]
Divide both sides by 8
[tex]\frac{8x}{8} = \frac{600}{8}[/tex]
[tex]x = \frac{600}{8}[/tex]
[tex]x = 75[/tex]
solve the following equations for g:2(g-h)=b+4
Answer:
g=b+4+2h/2
explanation:
first expand the brackets
let g be the subject of the equation
If the radius of a circle is 9 cm, what is the area of the circle?
Answer: 254.34 cm²
Step-by-step explanation:
Area of a circle: πr²
(3.14)9² = 3.14 × 81 = 254.34
Area of the circle ≈ 254.34 cm²
What is the domain of the function y=-720t + 3600 ?
Answer:
We conclude that:
[tex]\mathrm{Domain\:of\:}\:-720t+3600\::\quad \begin{bmatrix}\mathrm{Solution:}\:&\:-\infty \:<t<\infty \\ \:\mathrm{Interval\:Notation:}&\:\left(-\infty \:,\:\infty \:\right)\end{bmatrix}[/tex]
Please also check the attached graph.
Step-by-step explanation:
Given
Given the function
[tex]y=-720t\:+\:3600[/tex]
To determine
What is the domain of the function y=-720t + 3600
We know that the domain of the function is the set of input argument values for which the function is real and defined.
Given the function
[tex]y=-720t\:+\:3600[/tex]
From the given function, it is clear that the function has no undefined points nor domain constraints.
Therefore, the domain of the function is
[tex]-\infty \:<t<\infty \:[/tex]
Thus, we conclude that:
[tex]\mathrm{Domain\:of\:}\:-720t+3600\::\quad \begin{bmatrix}\mathrm{Solution:}\:&\:-\infty \:<t<\infty \\ \:\mathrm{Interval\:Notation:}&\:\left(-\infty \:,\:\infty \:\right)\end{bmatrix}[/tex]
Please also check the attached graph.
What is the reciprocal of
of 1/5?
The reciprocal of 1/5 is 5.
Reciprocals are numbers than when multiplied equal a product of 1. In this question, 1/5 * 5 = 1. An easy trick for finding reciprocals is flipping a fraction.
Hope this helps!!
A line passes through the point (-4 , -8) and has a slope of -3/2.
Write an equation in slope - intercept form for this line.
Answer:
[tex]y = \frac{-3}{2}x - 14[/tex]
Step-by-step explanation:
(-4 , -8) ; slope = (-3/2)
Equation of the line: y - y₁ = m( x- x₁)
[tex]y - [-8] = \frac{-3}{2}(x - [-4])\\\\y + 8 = \frac{-3}{2}(x +4)\\\\y + 8 = \frac{-3}{2}x +(\frac{-3}{2})*4\\\\y + 8 = \frac{-3}{2}x - 3 * 2\\\\ y = \frac{-3}{2}x -6 -8\\\\y = \frac{-3}{2}x - 14[/tex]
Complete each congruence statement by naming the corresponding angle or side (odd questions only)
Given:
11. [tex]\Delta DCB\cong \Delta CDM[/tex]
13. [tex]\Delta CBA\cong \Delta STA[/tex]
To find:
The missing values to complete the congruence statements:
11. [tex]\overline{BD}\cong \_\_\_\_\_[/tex]
13. [tex]\angle BAC\cong \_\_\_\_\_[/tex]
Solution:
11.
We have,
[tex]\Delta DCB\cong \Delta CDM[/tex]
Here, vertices D, C, B are corresponding to C, D, M. So,
[tex]\overline{BD}\cong \overline{MC}[/tex]
Therefore, the complete statement is [tex]\overline{BD}\cong \overline{MC}[/tex].
13.
We have,
[tex]\Delta CBA\cong \Delta STA[/tex]
Here, vertices C, B, A are corresponding to S, T, A. So,
[tex]\angle BAC\cong \angle TAS[/tex]
Therefore, the complete statement is [tex]\angle BAC\cong \angle TAS[/tex].
What is the value of y?
Answer:
y = 3√14 unit
... . . . ... . .
I hope it helps you
:-))
Which type of graph shows frequencies in categories as sectors of a whole?
Answer:
a pie graph shows frequences in categories as sectors of a whole.
Explanation:
a pie graph / chart is a circle divided into sectors. Each sector represents a category of data. The area of each sector is proportional to the frequency of the category.
Answer:
A Circle Graph
Step-by-step explanation:
A Circle Graph would be like a pie chart but the correct name is a CIrcle Graph
Simplify enter your answer
Simplify the following expression
wait the answer is b
I NEED HELP RIGHT NOW
Answer:
Bro it is not so clear ........
On what interval(s) of x does f have positive concavity?
On what interval(s) of x does f have negative concavity?
9514 1404 393
Answer:
positive concavity: nonenegative concavity: (-∞, ∞)Step-by-step explanation:
A parabola that opens downward has a second derivative that is negative everywhere. The interval of negative concavity is 'all real numbers', (-∞, ∞). There is no interval of positive concavity.
Only do 33 and 47 :)
Answer:
Q No 33: After solving c-1 we get the answer : 11
Q No 47: a) Money earned for mowing 1 lawns = 15 dollars
b) Money earned for mowing 7 lawns = 105 dollars
Step-by-step explanation:
Question No 33
We are given: a=3, b=2 and c=12
We need to evaluate c-1
It can be solve by placing the value of c, given in question and then subtract 1 from it.
We are given:
[tex]c-1\\Put\:c=12\\=12-1\\=11[/tex]
So, after solving c-1 we get the answer : 11
Question No 47
You can earn 15n dollars for mowing n lawns. How much do you earn for mowing 1 lawn? 7 lawn?
Money earned for mowing n lawns = 15 n
Money earned for mowing 1 lawn:
Put n = 1 in the equation:
[tex]15 n\\=15(1)\\=15[/tex]
So, Money earned for mowing 1 lawns = 15 dollars
Money earned for mowing 7 lawn:
Put n = 7 in the equation:
[tex]15 n\\=15(7)\\=105[/tex]
So, Money earned for mowing 7 lawns = 105 dollars
Cathy reads 4 pages of a book each morning
and 5 pages of a book each evening.
How many pages will she read in seven days?
Help me!!!!
Answer:
65
Step-by-step explanation: