Answer:
step by step explanation:64^3x=512^2x+12
64^3x-512^2x=12
2^18x-2^18x=12
0=12
There is no solution for x in the given quadratic equation.
What is a quadratic equation?The equation which is of 2nd degree is known as quadratic equation.
Example: ax^2 + bx + c = 0 (quadratic equation)
Here a, b, c are known quantities and x is variable.
Here a can't be 0.
The equation given in the question is:
64^3x =512^2x+12
(8^2)^3x = (8^3)^2x + 12
(8)^6x = (8)^6x + 12
There is no value of x, which will satisfy the equation hence it has no solution.
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$700 invested at 8% compounded quarterly after a period of 4 years
Answer:
$960.95
Step-by-step explanation:
The question is about finding the final amount after 4 years of a $700 investment with 8% interest, compounded quarterly. This can be solved using the compound interest formula.
Explanation:The subject of your question pertains to compound interest in mathematics. Given the parameters, we want to find the amount after 4 years when $700 is invested at an interest rate of 8%, compounded quarterly. To solve this, we can use the compound interest formula, A = P(1 + r/n)^(nt), where 'A' is the amount of money accumulated after n years, including interest, 'P' is the principal amount (the initial amount of money), 'r' is the annual interest rate (in decimal form), 't' is the time the money is invested for in years, and 'n' is the number of times that interest is compounded per year. Plugging the values in, we get A = $700(1 + 0.08/4)^(4*4) which gives us the total amount after 4 years.
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18 years ago Ivan was 3 times older than his son but now he is only 2 times older. How old is Ivan?
Answer:
Ivan isn't the son
Step-by-step explanation:
Shonda added 55 and 18. Her work is shown here. What mistake did she most likely make?
If you could marry, anyone in the world. Who would it be?
Answer:
I would marry Ino from Naruto
Step-by-step explanation:
Plz mark brainliest
Answer:
my bestfriend jaheim
Step-by-step explanation:
Debnil has 6 teaspoons of salt. The ratio of teaspoons to tablespoons is 3:1 How many teaspoons does Debnil have?
A. 1/18
B. 1/2
C. 2
D.18
This is an incomplete question, here is a complete question.
Debnil has 6 teaspoons of salt. The ratio of teaspoons to tablespoons is 3:1 How many tablespoons does Debnil have?
A. 1/18
B. 1/2
C. 2
D.18
Answer : The correct option is, (C) 2
Step-by-step explanation :
As we are give that Debnil has 6 teaspoons of salt.
The ratio of teaspoons to tablespoons is 3 : 1.
It means,
if he has 3 teaspoons then he has 1 tablespoons
if he has 1 teaspoons then he has [tex]\frac{1}{3}[/tex] tablespoons
So,
if he has 6 teaspoons then he has [tex]6\times \frac{1}{3}=2[/tex] tablespoons
Therefore, Debnil have 2 tablespoons of salt.
The number of tablespoons that debnil has is;
C: 2
Ratio ProportionWe are told that;
Number of teaspoons of salt = 6Ratio of teaspoons to tablespoons = 3:1Thus, if the total spoons is x. Then;
¾x = 6
Thus;
x = (4 × 6)/3
x = 8 spoons
Thus, number of tablespoons she has = 8 - 6 = 2
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Evaluate -6+(-12) =(-6).
Cancelling out both the -6 we get 12=0 which is not true, hence the equation is incorrect.
Match each scientific notation with the appropriate number
Answer:
wheres the answer choices
olivia has read 143 pages of a 220 -pages novel find the percent
Answer:
65%
Step-by-step explanation:
Cross, multiply and divide method has saved my life with these problems, heres how to do it.
Set up like this:
143 x
------- = -------
220 100
Multiply 143 by 100, then divide that by 220.
x= 65, so she has read 65%
Final answer:
Olivia has read approximately 65% of her 220-page novel by reading 143 pages.
Explanation:
To calculate the percent of the novel that Olivia has read, we use the formula: (number of pages read ÷ total number of pages) × 100%. Olivia has read 143 pages of a 220-page novel. Therefore, the calculation is (143 ÷ 220) × 100%, which simplifies to approximately 65%.
The steps to solve the problem are given below:
Step 1: 143 / 220 = 0.65
Step 2: 0.65 x 100 = 65%
So, Olivia has read about 65% of the novel.
Noa was walking in the forest and measured the circumference of two trees that he found. The first tree measured 37 5/8 inches around, and the second tree measured 45 1/3 inches around. Noa wanted to find the difference of the circumferences of the two trees. He recorded his steps in the table.
Step 1: 45 1/3- 37 5/8
Step 2: 45 8/24 - 37 15/24
Step 3: 44 32/24 - 37 15/24
Step 4: 44 32/24 - 37 15/24= 8 17/24
In which step did Noa first make an error?
Answer:
Step 4: 44 32/24 - 37 15/24= 8 17/24
Here we can finally find out the mistake done by Noa. The result is 7 17/24 and not 8 17/24.
Step-by-step explanation:
1. Let's review carefully all the steps taken by Noa to calculate the difference of the circumferences of the two trees.
Circumference Tree 1 = 37 5/8 inches around
Circumference Tree 2 = 45 1/3 inches around
Step 1: 45 1/3- 37 5/8
The measures are correct, no issues copying them.
Step 2: 45 8/24 - 37 15/24
Noa looked for common denominators
1/3 * 8/8 = 8 /24 is correct; 5/8 * 3/3 = 15/24 is also correct.
Step 3: 44 32/24 - 37 15/24
Noa looked for making the fraction part higher on the left side:
45 8/24 = 44 32/24 is correct because 24/24 = 1
Step 4: 44 32/24 - 37 15/24= 8 17/24
Here we can finally find out the mistake done by Noa. The result is 7 17/24 and not 8 17/24.
Answer:
step 4 is correct so D
Step-by-step explanation:
i just took the test
7th grade math help thxs
Answer:
a is 7.5
b is 67.5
c is 100
d is let me think on d
Answer:
a is 7.5
b is 67.5
c is 100
d is for every 7.5
Special right triangles: decimal answers
Answer:
h=11.3 and c=8(or 8.1 depending on what you do first)
Step-by-step explanation:
so we do the same thing like last time and 8√2 rounded is 11.3, and 7/√3, or 7√3/3 is 4( 4.04 gets rounded down). now we multiply by two because of the theorems and get 8(if this is wrong then try 8.1 because the answer differs depending on what you do first.)
Which of the following linear equations matches the graph?
y = 1/x
y = 1/3 x
y = 3x
y = -x
y = x
Answer:
y=x
Step-by-step explanation:
Answer:
y = x
because it's at 1y axsis, and 1x axsis
I need help!! Can you please make t the subject
Answer:
t=3
Step-by-step explanation:
Given that sin=2/5 and cos<0. Find the rest of the trigonometric functions
Answer:
[tex]\cos x=-\dfrac{\sqrt{21}}{5}\\ \\\tan x =-\dfrac{2}{\sqrt{21}}\\ \\\cot x=-\dfrac{\sqrt{21}}{2}[/tex]
Step-by-step explanation:
Given
[tex]\sin x=\dfrac{2}{5}\\ \\\cos x<0[/tex]
Use formula:
[tex]\cos^2x+\sin ^2x=1\\ \\\cos^2x+\left(\dfrac{2}{5}\right)^2=1\\ \\\cos^2x=1-\dfrac{4}{25}\\ \\cos^2x=\dfrac{21}{25}\\ \\\cos x=\pm \dfrac{\sqrt{21}}{5}[/tex]
Since [tex]\cos x<0,[/tex] then
[tex]\cos x=-\dfrac{\sqrt{21}}{5}[/tex]
By definition,
[tex]\tan x =\dfrac{\sin x}{\cos x}=\dfrac{\frac{2}{5}}{-\frac{\sqrt{21}}{5}}=-\dfrac{2}{\sqrt{21}}\\ \\ \\\cot x=\dfrac{1}{\tan x}=\dfrac{1}{-\frac{2}{\sqrt{21}}}=-\dfrac{\sqrt{21}}{2}[/tex]
What is the inverse of the function h(x) = 5/2x + 4
[tex]h^{-1}(x) = \frac{2x-8}{5}[/tex]
Step-by-step explanation:
Given function is:
[tex]h(x) = \frac{5}{2}x+4[/tex]
In order to find the inverse:
Replacing h(x) with y
[tex]y = \frac{5}{2}x+4[/tex]
Replacing x with y and y with x
[tex]x = \frac{5}{2}y+4[/tex]
Solving for y
[tex]x = \frac{5}{2}y+4\\x - 4 = \frac{5}{2}y+4-4\\x-4 = \frac{5}{2}y\\y = \frac{2}{5}(x-4)\\y = \frac{2x-8}{5}[/tex]
Replace y with h^(-1)(x)
[tex]h^{-1}(x) = \frac{2x-8}{5}[/tex]
Hence,
[tex]h^{-1}(x) = \frac{2x-8}{5}[/tex]
Keywords: Inverse, Functions
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Melvin has games and education apps on his tablet. He noticed that he has 3 game apps for every 2 education apps. Which of the following is another way to write this ratio?
A . 1:2
B. 2:1
C. 2:3
D. 3:2
Answer:
3:2
Step-by-step explanation:
Air pressure may be represented as a function of height above the surface of
the Earth as shown below.
P(h) = P.e-.000121
In this function, Pois air pressure at sea level, and his measured in meters.
Which of the following equations will find the height at which air pressure is
85% of the air pressure at sea level?
Answer:
The height is 1343.13 meters.
Step-by-step explanation:
Air pressure may be represented as a function of height h in meters above the surface of Earth as shown below :
[tex]P(h) = P. e^{-0.000121h}[/tex] ......... (1)
In this function, P is air pressure at sea level and h is measured in meters.
Let at a height of h meters the pressure is 85% of the sea level pressure.
Hence, from equation (1), we get
[tex]0.85 = e^{- 0.000121 h}[/tex]
Taking ln both sides, we can write
ln 0.85 = -0.000121 h (ln e) {Since [tex]\ln a^{b} = b \ln a[/tex]}
⇒ h = 1343.13 meters (Answer)
What is 1.652 (six is underlined) what is it rounded by the underlined digit?
Mr. Martin’s math test, which is worth 100 points, has 29 problems. Each problem is worth either 5 points or 2 points. Let x be the number of questions worth 5 points and let y be the number of questions worth 2 points. x + y = 29, 5x + 2y = 100 How many problems of each point value are on the test?
If 125% of x is 80 and x is n % of 400. what is
the value of n?
The value of x is determined as 64 by solving the first equation. This value is then used to find the percentage n, which turns out to be 16%.
Explanation:First, let's solve the equation 125% of x is 80. 1.25 times x equals 80. Therefore, x equals 64. Now, we can use that value to solve the second equation, x is n % of 400. This means 64 is what percent of 400. Expressing this as a proportion: 64/400 = n/100. Evaluating this gives n = 16%.
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Solve the formula for the variable h.
f = 8gh
h=?
Answer:The formula for variable h can be calculated by the following steps;
Step-by-step explanation:
f=8gh
f/8g=h
Or
h=f/8g
To solve for the variable h in the formula f = 8gh, divide both sides of the equation by 8g. The formula for the variable h is h = f / (8g).
Explanation:To solve the formula for the variable h, we need to isolate h on one side of the equation. In this case, the equation is f = 8gh. To isolate h, we divide both sides of the equation by 8g. This gives us:
h = f / (8g)
So the formula for the variable h is h = f / (8g).
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Graph the line that contains this point (-1,-3) and has a slope of 1/3
When trying to find the point-slope equation of a line you need to pick a point and plug it into the plain equation with your slope.
-3 = 1/3(-1) +b
Multiply your slope with your x
-3 = -1/3 +b
Move the -1/3 to the other side by doing the opposite operation, in this case being addition.
-3 +1/3 = b
-2 2/3 = b
y = 1/3x - 2 2/3
Carl's new car gets 27 miles per gallon. What is the equation that represents y, the total miles driven on x gallons of gas?
x = 27y
y = 27 + x
x = 27 + y
y = 27x
Answer:
The total miles driven equation is [tex]y=27x[/tex]
Step-by-step explanation:
Given:
Number of gallons of gas is x.
Total miles driven is y.
Carl's new car gets 27 miles per gallon.
Hence to calculate total miles driven we need to multiply 27 with number of gallons of gas.
Hence the equation becomes.
[tex]y=27x[/tex]
find last years salary if, after 6 percent raise, this years salary is $33,920
Last year's salary is $32000
Step-by-step explanation:
We will use the linear equations to solve the given problem
Let x be the last years salary
then
0.06x will be the raise in the salary
This year's salary is $33920
So,
[tex]x+0.06x=33920\\1.06x=33920[/tex]
Dividing both sides by 1.06
[tex]\frac{1.06x}{1.06}=\frac{33920}{1.06}\\=32000[/tex]
Hence,
Last year's salary is $32000
Keywords: Percentage, Linear equations
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Find the slope of the line that contains (3, -4) and (7, -2).
Answer:
The slope is 1/2.
Step-by-step explanation:
m=(-2-(-4))/(7-3)=(-2+4)/4=1/2
Solve for x
-16 = 8x/5
x=-25 3/5
x=10
x=-10
Answer:
x = -10
Step-by-step explanation:
-16 = 8x/5
-80 = 8x
x = -10
the expression 9x+6 represents the cost for three friends to go to the movies. Write 9x+6 as a product. Then tell how many friends went to the movies and what expression represents the cost of a movie ticket
Answer:
(9 x+6) = 3( 3x + 2)
(3x+2) represent the cost of each ticket.
Step-by-step explanation:
Here, the given expression representing the cost for three friends to go to the movies is : (9 x+6 )
Now,simplifying the given expression, we get:
(9 x+6) = 3( 3x + 2)
So, the given expression represents 3 times ( 3x + 2 ).
So, here (3x+2) represent the cost of each ticket.
And the expression 3 ( 3x+2) represent the cost 3 tickets combined.
PLEASE HELP!!!!!!!!!!:))))
Which of the following purchases shows the LEAST expensive unit price?
Group of answer choices
A 4 pack of t-shirts for $2.24
A 3 pack of t-shirts for $3.00
An 8 pack of t-shirts for $4.24
A 6-pack of t-shirts for $3.12
A 6-pack of t-shirts for $3.12 because 3.12 ÷ 6 is 0.52
Answer:
the last one is the least expensive it's only $0.52
Step-by-step explanation:
$2.24 ÷ 8 = $0.56
$3.00 ÷ 3 = $1.00
$4.24 ÷ 8 = $0.53
$3.12 ÷ 6 = $0.52
8x4
3x4
4x6
10x4
4x5
4x3
4x3
I can't really give an explanation, since it's just multiplication, so here are the answers:
1. 32
2. 12
3. 24
4. 40
5. 20
6. 12
7. 12
Can someone help me answer this?
Given the function f(x)= x^2+7x+10 / x^2+9x+20
Describe where the function has a hole and how you found your answer.
We need to simplify the function by factoring the numerator and the denominator. Plug the excluded values into the simplified function to find the hole.
Answer:
The function f(x) has a hole at point x = - 5.
Step-by-step explanation:
We are given a function as
[tex]f(x) = \frac{x^{2} + 7x + 10}{x^{2} + 9x + 20}[/tex]
Now, we have to describe where the function has a hole.
Now, [tex]f(x) = \frac{x^{2} + 7x + 10}{x^{2} + 9x + 20}[/tex]
⇒ [tex]f(x) = \frac{(x + 5)(x + 2)}{(x + 4)(x + 5)}[/tex]
Therefore, the common factor of the numerator and denominator is (x + 5).
Now, (x + 5) = 0
⇒ x = - 5
Therefore, the function f(x) has a hole at point x = - 5. (Answer)
By factoring and simplifying the function f(x)=(x^2+7x+10)/(x^2+9x+20), we find a hole at x=-5. This is because -5 was an excluded value in the original function, but does not cause the denominator to be zero in the simplified function.
Explanation:The given function is f(x) = (x^2+7x+10) / (x^2+9x+20). To find where the function has a hole, we need to factor both the numerator and the denominator. We also must exclude any values of x that would cause the denominator to be zero as these are undefined in the function.
The numerator factors into (x+2)(x+5), and the denominator into (x+4)(x+5). If we simplify, the x+5 term will cancel out, leaving us with f(x) = (x+2)/(x+4).
Originally, x could not be equal to -4 or -5, as these would make the denominator zero. In the simplified function, only x=-4 causes the denominator to be zero. But since x=-5 was an excluded value in the original function, that indicates there is a 'hole' at x=-5 on the function.
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