A certain forest covers an area of 8.25%. Suppose that each year this area decreases by 4800km^2. What will the area be after 5 years?
Solution:
The decreasing function is given as:
[tex]y = a(1-r)^t[/tex]
Where,
y is future value
a is initial value
r is decreasing rate
t is number of years
From given,
a = 4800
t = 5
[tex]r = 8.25 \% = \frac{8.25}{100} = 0.0825[/tex]
Therefore,
[tex]y = 4800(1 - 0.0825)^5\\\\y = 4800 \times 0.9175^5\\\\y = 4800 \times 0.6501\\\\y = 3120.841[/tex]
Thus the area after 5 years is 3120.841 square kilometer
What’s 4(-8x+5)-(33x-26)=
Answer:
x = -6/65
Step-by-step explanation:
Perform the indicated multiplications: 4(-8x+5) - 1(33x-26), obtaining:
-32x + 20 - 33x + 26
Combining like terms, we get
-65x = 6, or
x = -6/65
Find the value of x to the nearest tenth.
Answer:
16. The answer is 16.5
17. The answer is Sin33.1°
18. The answer is 38.2
Step-by-step explanation:
In rounding up figures, number 1 to 4 is rounded up to 0 while numbers 5 to 9 is rounded up to 1.
16. Two sides in the right angle triangle are involved, the opposite side and the adjacent side, hence we use the tangent.
Tan36°=12/x
Cross multiply
x(tan 36°)= 12
Divide both sides by tan36°
x= 12/tan36°
16.516583
Rounded to the nearest tenth, we have 1 as the digit hundredth, which will be rounded up to 0.
Added to the tenth digit, still remains 5.
Answer therefore is 16.5
17. Two affected sides here is the opposite side and hypothenus sid, hence we use the sine.
sin x=12/22
= 33.055°
The digit hundredth is 5, which is rounded up to 1. Added to the tenth digit, we have 0+1=1
Answer is 33.1
18. Two affected sides are the opposite side and hypothenus side, we also use the sine.
Sin58°=x/45
Make x the subject
x=45/sin58°
38.162
6 is the digit hundredth, and it is rounded up to 1. Adding 1 to 1, the tenth digit in the figure above, we have our answer as
38.2
Solve x2 + 2x + 9 = 0. (2 points) x equals negative 2 plus or minus 4 I square root of 2 x equals negative 2 plus or minus 2 I square root of 2 x equals negative 1 plus or minus 4 I square root of 2 x equals negative 1 plus or minus 2 I square root of 2
Answer:
it is D (-1 + or - 2i square root of 2)
Step-by-step explanation:
just took test
The value of x obtained after solving the equation x² + 2x + 9 = 0 will be x = -1 ±2i √(2)(x equals negative 1 plus or minus 2 I square root of 2).Option D is correct.
What is a quadratic equation?Any equation of the form ax²+bx+c=0 where x is variable and a, b, and c are any real numbers where a ≠ 0 is called a quadratic equation.
As we know, the formula for the roots of the quadratic equation is given by:
[tex]\rm x = \dfrac{-b \pm\sqrt{b^2-4ac}}{2a}[/tex]
it is given that,
x² + 2x + 9 = 0
Rearrange the equation as
x² + 2x = - 9
Add 1 on both sides of the equation,
x² + 2x +1 = - 9 +1
x² + 2x +1 = - 8
(x+1)² = -8
Taking square root,
(x+1) = √ -8
Subtract 1 from both sides,
x+1-1 = -1 ±√(-8)
x = -1 ±√(-8)
√(-8) can be written as,
√(-8) = 2i√2
Substitute the values,
x = -1 ±2i sqrt(2)
Thus, the value of x obtained after solving the equation x² + 2x + 9 = 0 will be x = -1 ±2i √(2)(x equals negative 1 plus or minus 2 I square root of 2).Option D is correct.
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Two lines intersect to form the angles shown.
Which statements are true?
Select each correct answer.
m<1=100 degrees
m<3=80 degrees
m<2= 80 degrees
m<3=m<1
Answer:
m∠3=80 degrees
m∠3=m∠1
Step-by-step explanation:
When two lines intersect, the opposite angles are equal. They are called vertical angles. That means for this problem:
m∠1 = m∠3 *Last option is true
m∠2 = 100° *Third option is false
A straight line is always 180°. When it is cut up, the sum of the angles is 180°. They are called suppementary angles. These are supplementary:
100° + m∠3 → m∠3 = 80° *Second option is true
m∠1 + 100° → m∠1 = 80° *First option is false
m∠1 + m∠2 → One or the other is 100° and 80°
m∠2 + m∠3 → One or the other is 100° and 80°
First, we need to figure out how much you want to borrow. You said you wanted to spend $5,000, and you will put $500 down. Based on that, we can estimate your taxes to be $340. Put those numbers to see how much money you will need for your loan.
Answer: You will need $4,160 for the loan.
The money that will need for the loan is $4160.
What is down payment?A down payment is a sum of money the buyer pays at the outset of a large transactions. The down payment represents a portion of the total purchase price, and the buyer will often take out a loan to finance the remainder.
For the given situation,
The total amount wanted to spend = $5000
Down payment = $500
Tax amount = $340
Money that will need for the loan can be calculated as
⇒ [tex]5000-(500+340)[/tex]
⇒ [tex]5000-840[/tex]
⇒ [tex]4160[/tex]
Hence we can conclude that the money that will need for the loan is $4160.
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Find the center of the circle whose equation is (x-2)^2(y-4)^2=9.
A.(-2,-4)
B.(2,4)
C.(4,2)
Answer:
B.(2,4)
Step-by-step explanation:
The equation for a circle is written as
(x-h)^2 +(y-k)^2 = r^2
where (h,k) is the center and r is the radius
(x-2)^2+(y-4)^2=9.
Rewriting this equation
(x-2)^2+(y-4)^2=3^2
The center is at (2,4)
Translate six minutes less then bobs time in a algebraic expression
Answer:
B-6
Step-by-step explanation:
If (B) represents Bob's time, six minutes less than Bob's time is B-6=T where (T) represents the time six minutes less than Bob's time.
The phrase 'six minutes less than Bob's time' can be translated into the algebraic expression 'B - 6', where 'B' represents Bob's time.
Explanation:The given phrase 'six minutes less than Bob's time' can be written as an algebraic expression. Algebraic expressions are mathematical phrases containing numbers, variables (like 'Bob's time'), and operations. In this case, we can symbolize 'Bob’s time' as a variable, let’s choose 'B'. Then 'six minutes less than Bob's time' translates to 'B - 6' in an algebraic expression. That’s because 'less than' implies subtraction and it always means you subtract from the number or variable stated after the expression, in this case, 'Bob's time' or 'B'.
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owl is related to a mouse in the same way that a predator is related to
Answer:
its prey
Step-by-step explanation:
An owl is a predator to a mouse, they attack mice and eat them so the owl is the predator and the mouse is the prey. There for an owl is related to a mouse in the same way that a predator is related to its prey
Yo sup??
the answer to this question is prey
as an owl eats a mouse similarly a predator eats is prey
Hope this helps
how to graph -5x + y = 1
Answer:
look on the graph i gave you
Step-by-step explanation:
4 is to 6 as 10 is to what
Answer:
x = 15
Step-by-step explanation:
Step 1: Make an expression
4/6 = 10/x
Step 2: Cross multiply
4/6 = 10/x
4x = 60
Step 3: Divide both sides by 4
4x / 4 = 60 / 4
x = 15
Answer: x = 15
Answer:
15
Step-by-step explanation:
4 is to 6 as 10 is to what
Represent the unknown number as x and write as a ratio
4:6 = 10:x
Write as fractions
4/6 = 10/x
Cross-multiply
4x = 60
Divide both sides of the equation by 4
x = 15
15
Hope this helps :)
A function, f, passes through the points (1,1), (2,7) and (3,25). A function, g, passes through the points (1,36), (2,43) and (3,50).
Select the correct answer.
Answer:
As the value of x increases, the value of f(x) will eventually exceed the value of g(x) is the correct option.
Step-by-step explanation:
A function, f, passes through the points (1,1), (2,7) and (3,25).
The equation of the function 'f' can be written as:
The f(x) is obtained by:
[tex]f\left(x\right)=3f\left(x-1_\right)+4[/tex]
[tex]f\left(4\right)=3f\left(3\right)+4=\left(25\times 3\right)+4=75+4=79[/tex]
A function, g, passes through the points (1,36), (2,43) and (3,50).
The g(x) is obtained by:
[tex]g\left(x\right)=g\left(x-1\right)+7[/tex]
[tex]g\left(4\right)=g\left(4-1\right)+7=g\left(3\right)+7=50+7=57[/tex]
So, value of f(x) at x = 4 exceeds the value of g(x) at x = 4.
Therefore, as the value of x increases, the value of f(x) will eventually exceed the value of g(x) is the correct option.
Which of the binomials below is a factor of this trinomial?
x2 + 14x+ 40
2 + 10
Β. χ+ 4
C. x-9
D. χ + 14
SUBMIT
Solution:
Given is:
[tex]x^2 + 14x + 40[/tex]
Factor the above polynomial
From given,
[tex]x^2 + 14x + 40[/tex]
[tex]Split\ the\ middle\ term\\\\x^2 + 4x + 10x + 40\\\\Break\:the\:expression\:into\:groups\\\\\left(x^2+4x\right)+\left(10x+40\right)[/tex]
[tex]\mathrm{Factor\:out\:}x\mathrm{\:from\:}x^2+4x\mathrm{:\quad }x\left(x+4\right)\\\\x(x + 4) + (10x + 40)\\\\\mathrm{Factor\:out\:}10\mathrm{\:from\:}10x+40\mathrm{:\quad }10\left(x+4\right)\\\\x(x + 4) + 10(x + 4)\\\\\mathrm{Factor\:out\:common\:term\:}x+4\\\\\left(x+4\right)\left(x+10\right)[/tex]
Thus, the binomials factor of given is (x + 4) and (x + 10)
Multiplying Polynomials, Simplify with Work Shown.
3x^2 (4x^3 + 9x^2 - 8x + 4)
20 Point offer for real, complete answer.
Answer:
12x^5+27x^4-24x^3+12x^2:
Step-by-step explanation:
hope it helps
the first term of an arithmetic sequence is -27. the common difference of the sequence is 6. What is the sum of the first 30 terms
Answer:
1800
Step-by-step explanation:
The sum to n terms of an arithmetic sequence is
[tex]S_{n}[/tex] = [tex]\frac{n}{2}[/tex] [ 2a₁ + (n - 1)d ]
where a₁ is the first term and d the common difference
Here a₁ = - 27 and d = 6, thus
[tex]S_{30}[/tex] = [tex]\frac{30}{2}[/tex] [ (2 × - 27) + (29 × 6) ]
= 15( - 54 + 174)
= 15(120)
= 1800
The sum of the first 30 terms of the arithmetic sequence, is 1800.
In an arithmetic sequence, the sum of the first n terms can be calculated using the formula:
Sum = n/2 × (2a + (n-1)d), where:
n is the number of termsa is the first termd is the common differenceGiven:
First term (a) = -27Common difference (d) = 6Number of terms (n) = 30Plugging in these values, we get:
Sum = 30/2 × (2(-27) + (30-1) × 6)
Calculating step-by-step:
Calculate the first part: 30/2 = 15Calculate inside the parentheses: 2(-27) + (30-1)6 = -54 + 29*629 × 6 = 174-54 + 174 = 120Final calculation: 15 × 120 = 1800Therefore, the sum of the first 30 terms of the arithmetic sequence is 1800.
Help show the work for
5.2 divide by 0.13
Answer:
40
Step-by-step explanation:
0.13 ⟌5.2 (We can move 0.13 over two spots)
13⟌520 (We move the decimal two spots because of previous)
We have
₄ ₀
13⟌520
- 52
______
0 0
- 0
______
0
So 40 is our final answer.
The value of (5.2/0.13) is 40 obtained by removing the decimals.
What are some alternative names for arithmetic operations?Addition is also known as the sum, subtraction is also known as the difference, multiplication is also known as the product, and division is also known as the factor.
Given, 5.2 is divided by 0.13, which is (5.2/0.13).
Now we can multiply both the numerator and the denominator by 100.
∴ (5.2/0.13)×(100/100).
= 520/13.
= 40.
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15^1/5 rewrite in radical form
Answer:
[tex]\sqrt[5]{15}[/tex]
Step-by-step explanation:
A number to 1/5 is the [tex]\sqrt[5]{n}[/tex]
A number to 1/3 is the [tex]\sqrt[3]{n}[/tex]
So, since the number is 15 to the 1/5, it is [tex]\sqrt[5]{15}[/tex]
Answer: [tex]\sqrt[5]{15}[/tex]
Answer:
[tex]15^{\frac{1}{5} } = \sqrt[5]{15}[/tex]
Step-by-step explanation:
recall that
[tex]a^{\frac{1}{b} } = \sqrt[b]{a}[/tex]
if we apply this to our case,
[tex]15^{\frac{1}{5} } = \sqrt[5]{15}[/tex]
You buy a watch for $60. Your friend buys the same watch a month later. It is now sold at a discount of 15%. What is the new sale price?
Answer:
$9.00
Step-by-step explanation:
~~~~Hey there~~~~
1. Since it was 15% discount, that means you have to solve 15% of 60, which is equivalent to 0.15 x 60.
2. Since the product of 0.15 and 60 is 9, then 9 is your answer.
3. Your final answer is $9.00
Hope this helped!
~delightedsunrise8
Answer:
56
Step-by-step explanation:
You would first do 60 divide by 15 and get 4. Then you subtract 4 from 60 and get 56 as your answer.
WILL GIVE 100 POINTS,.A car’s wheels spin at 1000 revolutions per minute. The diameter of the wheels is 23 inches. You want to know how fast the car is travelling. Show your work
Answer:
72,220
Step-by-step explanation:
23,000 • 3.14 =
If the vehicle is traveling at 1,000 revolutions per minute, with the diameter of the wheels being 23 inches, the vehicle would be moving at 72,220 inches per minute.
72220.000512 = 68.390152 = 68 MPH
x + 5 = 2(7 + x) in sentence form
Answer:
x plus 5 equals 2 times brackets 7 plus x
Step-by-step explanation:
A local hamburger shop sort of combined total of 724 hamburgers and cheeseburgers on Tuesday there were 74 more cheeseburgers sold them hamburgers how many hamburgers were sold on Tuesday
Answer:
325
Step-by-step explanation:
h + 74 = 724
h = 724 - 74
h = 650.
h = 325.
» How many ounces are in 1 cup?
1)
The unit rate is
ounces per cup.
Answer:
8 oz. per cup
Step-by-step explanation:
A shoreline is eroding at a rate of 1/3 foot per 3 months. How many feet are eroding per year?
The number of feet the shoreline is eroding per year is 1 ⅓ feet.
How many feet are eroding per year?
Rate of shoreline eroding per 3 months = 1/3 foot
Number of 3 months in a year = 12 months / 3 months
= 4
Number of feets of the shoreline eroding per year = Rate of shoreline eroding per 3 months × Number of 3 months in a year
= 1/3 × 4
= 4/3 feet per year
Therefore, the shoreline erodes 1⅓ feet per year
3) Paul bought 2 muffins, 2 brownies and I cookie at a bake sale. The muffins cost $1.30
each, the brownies cost $0.75 a piece and the cookie was $0.50. If he paid with a twenty
dollar bill, how much change should he get back?
Answer:
$15.40
Step-by-step explanation:
1.30 × 2 = 2.60
0.75 × 2 = 1.50
2.60 + 1.50 + 0.50 = 4.60
20 - 4.60 = 15.40
Solve -8(2z-3) Equivalent to -16z-3
Answer:
-16z + 24
Step-by-step explanation:
Apply the Distributive Property of Multiplication:
-8(2z-3) = -16z + 24
Answer:
-27
Step-by-step explanation:
-8 ( 2z - 3 ) = -16z - 3
distribute -8
-16z + 24 = -16z - 3
add 16z on right side
z + 24 = - 3
subtract 24 on left side
z = -27
Hopefully this helps :)
Kendra gets a paycheck of $300 after 5 days of work. At this rate, how much does she get paid for working 24 days?
Answer:
$1440
Step-by-step explanation:
First, find the unit rate by dividing 300 by 5, which equals 60. So, Kendra earns $60 in one day. Then, multiply 60 by 24, which equals 1440. So, Kendra makes $1440 in 24 days. Hope this helped!
Answer:1440 dollars earned In 24 hours
Step-by-step explanation: first divide 300 by 5 to get 60 then multiply 60 by 24 to get 1440
Decimal equivalent to 11/44
Answer:0.25
Step-by-step explanation:
11/44 is equal to 1/4
1/4 is 0.25
PLEASE be respectful and don't do this for the points!
At the mission museum Mrs. Perez visited over break, there is a pond like the one below that has a ring-shaped sidewalk around it. The outer edge of the sidewalk is a circle with a radius of 10 m. The inner edge of the sidewalk is a circle with a radius of 8 m.
(a) Write and simplify an expression for the exact area of the sidewalk. (4 points possible)
(b) Find the approximate area of the sidewalk. Use 3.14 to approximate π. (3 points possible)
Answer:
The formula for area of a circle is : A = PI x r^2
A) find the are of the two circles, subtract the two to find the area of the side walk:
Outside circle: A = PI x 10^2
Area = 100PI
Inner circle: A = PI x 8^2
Area = 64PI
Area of sidewalk:
100PI - 64 PI = 36PI
B) replace PI with 3.14:
Area = 36 x 3.14 = 113.04 square meters.
Step-by-step explanation:
Hope this helped.
what decimal is equivalent to negative 3/8
Answer:
-6/16
Step-by-step explanation:
Step 1: Find equivalent to -3/8
(-3*2) / (8*2)
-6/16
Answer: -6/16
Answer:
-0.375
Step-by-step explanation:
If you have a scientific calculator just plug in [tex]-\frac{3}{8}[/tex] then switch it to decimal form
[tex]-\frac{3}{8} = -0.375[/tex]
If you need help going from fraction to decimal form all you need to do is divide -3 by 8 = -0.375
7. (03.05 LC)
The functions f(x) and g(x) are described below:
f(x) = 7x + 9
g(x) = 7x – 4
The graph of g(x) is obtained by shifting down the graph of f(x) byl
units. (5 points)
8. (03.05 LC)
T
halha
t atamata baze decrribae the Affert frankmino thaiarnik
r.
Answer:
13 units
Step-by-step explanation:
g(x) = 7x + 9 - 13
g(x) = f(x) - 13
Answer:
7. the answer is 13
Step-by-step explanation: