What is 7 1/5 as a decimal?
The number of trees in a forest is decreasing at a rate of 5% per year. The forest had 24,000 trees 15 years ago. Write an exponential decay function to model the situation. Then find the number of trees now.
A. y = 25,000 (0.85)t; 11,119 trees
B. y = 25,000 (0.95)t; 11,119 trees
C. y = 24,000 (0.95)t; 11,449 trees
D. y = 24,000 (0.95)t; 11,119 trees
Answer:
I think the answer is C
Toni gets paid $30 to rake a lawn. The mean man who hired her deducts $3 from her wage for every 2 leaves that are still left on the lawn when she finishes the job. How many leaves does the mean man have to see left on the ground before Toni goes home with no money?
Answer:
20 leaves
Step-by-step explanation:
Step one:
given data
we are told that the amount paid =$30
The mean man deducts $3 for every 2 leaves seen on the lawn.
we are expected to estimate the number of leaves that can amount to a $30 deduction.
Step two:
let the number of leaves be x
so if 2 leaves are worth $3 deductible
the x leave will worth $30 deductible
cross multiply we have
x=30*2/3
x=60/3
x=20 leaves
1+(2)(3)(4)=
HELP ME PLEASE
Answer:
25
Step-by-step explanation:
1+(2)(3)(4)
=1+(6)(4)
=1+24
=25
Hope this helps!
Answer: The answer would be 25
Step-by-step explanation: So the first thing you do, is multiply each number in parentheses first. So 2 mulitplied by 3 is 6. Then multiply 6 by 4 to get 25. Then add 1 to 24, to get 25. Hoped this helped
Evaluate the function.
f(x) = -x2 – 3x + 15
Find f(-8)
Answer:
38 baby
Step-by-step explanation:
Answer:
[tex] f(-8) = -25 [/tex]
Step-by-step explanation:
[tex] f(x) = -x^2 - 3x + 15 [/tex]
[tex] f(-8) = -[(-8)^2] - 3(-8) + 15 [/tex]
[tex] f(-8) = -(64) + 24 + 15 [/tex]
[tex] f(-8) = -25 [/tex]
Find the value of h(-67) for the function below.
h(x) = -49x − 125
A. 3,283
B. 3,158
C. -3,408
D. -1.18
Answer:
B. 3158Step-by-step explanation:
Given function:
h(x) = -49x − 125Finding h(-67)
h(-67) = -49(-67) - 125 = 3283 - 125 = 3158Correct option is B.
Concepts:
FunctionsAnswer: B. 3158
We know:
h(x) = -49x − 125
Finding h(-67)
h(-67) = -49(-67) - 125 = 3283 - 125 = 3158
ANSWER = 3158/B
Jessica lived in Spain and Colombia for a total of 18 months in order to learn Spanish.She learned an average of 160 words per month when she lived in Spain, and an average of 200 per month when she lived in Colombia. In total, she heard 3200 new words. How long did Jessica live in Spain, and how long did she live in Colombia?
Answer:
Jessica lived 10 months in Spain and 8 months in Colombia.
Step-by-step explanation:
Let x be the months Jessica spent in Spain, and y the months she spent in Colombia:
1. x + y = 18
Using the information of words per month learned in each country, we can also write the equation:
2. 160 * x + 200 * y = 3200
So now we have a system of two equations and two unknowns.
First we express y in terms of x, in the first equation:
x + y = 18y = 18 - xWe replace y in the second equation:
160 * x + 200 * (18 - x) = 3200And solve for x:
160x + 3600 - 200x = 3200-40 x = -400x = 10Finally we use that value of x in the first equation and solve for y:
10 + y = 18y = 8Jessica lived 10 months in Spain and 8 months in Colombia.
Are 3/2 and 7/4 proportional ratios?
Answer:
No
Step-by-step explanation:
3/2 = 1 1/2 = 1.50
7/4 = 1 3/4 = 1.75
HOPE THIS HELPS
PLZZ MARK BRAINLIEST
The temperature of a pot of water placed on a hot burner can be found using the function f(x) = 25x + 60, where x is the number of minutes since the pot was placed on the burner. If the pot of water is on the burner for no more than 3 minutes, what is the domain of the function for this situation?
Answer:
[tex]0 \leq x \leq 3[/tex]
Step-by-step explanation:
Given
[tex]f(x) = 25x + 60[/tex]
Required
Determine the domain
The domain, in this case means the possible values of x
From the question, we understand that x represents minutes
Since it's impossible to have a negative minutes, then x starts at 0
i.e. [tex]x \geq 0[/tex] or [tex]0 \leq x[/tex]
Also, from the question, we understand that the time can not be more than 3 minutes
i.e.
[tex]x \leq 3[/tex]
Now, we have two inequalities:
[tex]0 \leq x[/tex] and [tex]x \leq 3[/tex]
Which can be written as:
[tex]0 \leq x \leq 3[/tex]
Hence, the domain is: [tex]0 \leq x \leq 3[/tex]
what is the slope for (8,-4) and (-2,-4)
Answer:
2
Step-by-step explanation:
Help please select the Awnser choices right awnsers only AWNSER BOTH QUESTIONS PLEASE
Answer:
Step-by-step explanation:
1. B
2. True
Answer: the awnser is D
Step-by-step explanation:
the awnser would be d becuase the others dont make sense at all enegry cannot be destroyed at all but it can change form hope this helps
Find the solution of the system of equations.
-10x-y=27
-4x-y=9
Answer:
(-3,3)
Step-by-step explanation:
y=3
x=−3
Answer:
x=−1/10 y+ −27/10
x=−1/4 y+ −9/4
Step-by-step explanation:
−10x−y=27
Step 1: Add y to both sides.
−10x−y+y=27+y
−10x=y+27
Step 2: Divide both sides by -10.
−10x /−10= y+27 /−10
x=−1/10 y+ −27 /10
−4x−y=9
Step 1: Add y to both sides.
−4x−y+y=9+y
−4x=y+9
Step 2: Divide both sides by -4.
−4x /−4= y + 9/−4
x= −1/4 y + -9/4
What are the steps to graphing y=x+5
Answer:
put in the y int- which is 5 and then the slope which is 1/1
Step-by-step explanation:
There are 20 students in a drama class. The mean age of 12 students is 18 years. The mean age of the remaining 8 students of the drama class is 23 years. What is the mean age of all the students in the drama class?
Answer:
Step-by-step explanation:
Total sum of age of 12 students = 12*18 = 216;
Total sum of age of 8 students = 8*23 = 184;
Total sum of age of 20 students = 216+184 = 400;
Mean age of all the students = total age / number of students;
= 400/20 = 20 year
Step-by-step explanation:
Question 1
Which choice shows a 90° clockwise rotation of the figure about the point P?
Answer: BRAINLIEST PLEASE
first question welcome to brainly tha world of trolls thanks for the free pionts ............ hehehe im kidding here is the real answer. The first one
Step-by-step explanation:
i took the test
What is the value of x in the figure?
Answer these correctly for me please...
troll and get reported
Answer:
on the left: y = -4x - 2 and y = 1/3x - 2
on the right: 3s + 1c = 3 and 3s + 2c = 52
If x = -8, y = 7, and z = -11. Evaluate each expression :-X - y
Answer:
the number in front of a term is called a convention examples of single terms three times is a single term the three contents so then it would probably be 24 because 7284 time be planted in their preferred method to show multiplication example 3 evaluate the expression and then you go wide equals 6 and 24 hope this helps it's an example not the real answer though LOL
Answer:
-x-y=1
Step-by-step explanation:
just plug in the numbers.
-x-y
-(-8)-7
8-7
1
Is (2,4) a solution of 3x - y = 2?
yes because when filling in the unknown (3*2-4=2) gets you the answer of 2.
Answer: Yes, it is a solution.
Step-by-step explanation:
3(2)=6-4=2
An angle measures 54.4 less than the measure of it's complementary angle
Answer:
4th of August is the murderer of our
Step-by-step explanation:
6th 5th of the books is the murderer murderer
(2.5 x 104) – (1.4 x 10')
A) 2.36 x 104
B) 2.48 x 104
C) 23.6 x 103
D) 1.1 x 101
Answer:
The answer is 246 simplified so A
Step-by-step explanation:
Alex's swimming pool is 9.9 meters long, 12.1 meters wide, and 5 meters deep. Which is closest to the number of cubic meters of water the pool will hold?
Answer:
598.95
Step-by-step explanation:
multiply the 3 numbers for the m3
I will give brainliest just help please come on:)
Answer:
have watch a video yet if you have not it will help you on it
Step-by-step explanation:
Rewrite the function f of x equals 6 times one fourth to the 2 times x power using properties of exponents. PLEASE I NEED HELP
Answer:
the third one
Step-by-step explanation:
........
Answer: C
Step-by-step explanation:
8. A living room wall is 13 feet long. If the perimeter of the rectangluar living room is 56 feet long, what is the length of the other wall in the living room?
Answer:
Step-by-step explanation:
A living room wall is 13 feet long. If the perimeter of the rectangular living room is 56 feet long.
The formula for the perimeter of the rectangular living room =
P = 2(L + W)
P = 2L + 2W
L = Length = 13 feet
W = Width
P = 56 feet
56 = 2 × 13 + 2 W
56 = 42 + 2W
56 - 42 = 2W
14 = 2W
W = 14/2
W = 7
The width of the rectangular room is 7 feet long
A rectangular room would have 4 walls
what is one and nine thousandths. in standard form
Answer:
1 9/1000
Step-by-step explanation:
Answer:
1.009
Step-by-step explanation:
A rocket is launched with an initial upward velocity of 320 feet per second from an initial height of 15 feet.
The function h (t) = -1672 + 320t + 15 models the height of the rocket, in feet, t seconds after it was
launched. For how many seconds is the height of the rocket greater than or equal to 1.039 feet?
Answer:
The height of the rocket is greater than or equal to 1.039 feet during first 19.936 seconds.
Step-by-step explanation:
The height of the rocket launched from the ground is modelled after the following expression:
[tex]h(t) = -16.087\cdot t^{2}+320\cdot t +15[/tex] (1)
Where:
[tex]t[/tex] - Time, measured in seconds.
[tex]h[/tex] - Height, measured in feet.
After a careful reading to the statement, we translate all relevant information into the following mathematical inequation:
[tex]-16.087\cdot t^{2}+320\cdot t +15\ge 1.039[/tex] (2)
After some algebra, we get the equivalent inequation:
[tex]-(16.087\cdot t^{2}-320\cdot t -13.961)\ge 0[/tex]
[tex]16.087\cdot t^{2}-320\cdot t -13.961 \le 0[/tex]
[tex](x-19.936)\cdot (x+0.044)\le 0[/tex]
Which means that the following conditions must be observed to satisfy the inequation above:
[tex]x-19.936\le 0\,\land\,x+0.044\ge 0[/tex]
[tex]x\le 19.936\,s\,\land\,x\ge -0.044\,s[/tex]
[tex]0\,s\le x \le 19.936\,s[/tex]
The height of the rocket is greater than or equal to 1.039 feet during first 19.936 seconds.
How is the concavity of the parabola related to the orientation of the parabola?
Answer:
When it yields a negative constant, the original function is everywhere concave down. In other words, when the second derivative of the equation of our parabola is positive, the parabola opens upward; when it is negative the parabola opens downward. Example 2: If y = -2(x-1)² + 3, determine the parabola's orientation.
Step-by-step explanation:
I hope this helps and can you give me a Brainliest plz plz plz.
what is 690 multiplied by 1/4?
Answer: Your answer would be 172 1/2
Step-by-step explanation: Hoped this helped you!!!
The ordered pair (2, -4) is a solution to the system y= -2x and x -2y = 10.