Answer:
A could finish the whole work in 60 days
Step-by-step explanation:
Both A and B can finish the work in 30 days.
That means both A and B can finish 1/30 part of the work in 1 day.
So in 20 days, both A and B can finish 20/30 = 2/3 part of the work.
Both A and B worked together for 20 days and completed 2/3 part of the work. Now 1/3 part of the work is remaining.
But after 20 days B left the work. Now A finished the remaining 1/3 part of the work alone.
Given A has completed the remaining 1/3 part of the work in 20 days. We are asked to find in how many days A could finish the whole work.
Let A could finish the whole work in x days.
That means A could finish 1/x part of the work in 1 day.
So in 20 days, A could finish 20(1/x) = 20/x part of the work.
But it's given that A finished the remaining 1/3 part of the work in 20 days.
Thus we are able to equate 20/x and 1/3.
[tex]\longrightarrow\dfrac{20}{x}=\dfrac{1}{3}[/tex]
[tex]\Longrightarrow\underline{\underline{x=60}}[/tex]
Hence A could finish the whole work in 60 days.
A pattern of ordered pairs is shown.
(0, 1), (2,4), (4,7), (6, 10)
The pattern continues. What is the eighth ordered pair in the pattern?
A. (8,13) B. (14, 18). C. (14, 22) D. (16, 19)
Answer: C
Step-by-step explanation:
X’s are going by +2 and y’s by +3
After identifying the pattern, its eighth ordered pair is: (14, 22), option C.
--------------------------
The ordered pairs given are: (0, 1), (2,4), (4,7), (6, 10)
From them, we can see that for each new ordered pair, x increases by 2, and y increases by 3.Thus, the next ordered pairs are: (8, 13), (10, 16), (12, 19), (14, 22).The eighth ordered pair is given by (14,22), option C.A similar problem is given at https://brainly.com/question/16599038
A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by the given equation. Using this equation, find the time that the rocket will hit the ground, to the nearest 100th of second.(Quadratic Word Problems (Profit/Gravity)
y=-16x^2+121x+83
Answer:
The rocket will hit the ground after about 8.20 seconds.
Step-by-step explanation:
The height of the rocket y, in feet, x seconds after launch is modeled by the equation:
[tex]y=-16x^2+121x+83[/tex]
We want to find the time at which the rocket will hit the ground.
If it hits the ground, the height of the rocket y will be 0. Thus:
[tex]0=-16x^2+121x+83[/tex]
We can solve for x. Factoring (if possible at all) or completing the square can be tedious, so we can use the quadratic formula:
[tex]\displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex]
In this case, a = -16, b = 121, and c = 83. Substitute:
[tex]\displaystyle x=\frac{-(121)\pm\sqrt{(121)^2-4(-16)(83)}}{2(-16)}[/tex]
Simplify:
[tex]\displaystyle x=\frac{-121\pm\sqrt{19953}}{-32}[/tex]
Divide everything by -1 and simplify the square root. The plus/minus will remain unchanged:
[tex]\displaystyle x=\frac{121\pm3\sqrt{2217}}{32}[/tex]
Therefore, our two solutions are:
[tex]\displaystyle x=\frac{121+3\sqrt{2217}}{32}\approx 8.20\text{ or } x=\frac{121-3\sqrt{2217}}{32}\approx -0.63[/tex]
Since time cannot be negative, we can ignore the second solution.
Therefore, the rocket will hit the ground after about 8.20 seconds.
Solve -4x + 6(x + 2) = 20.
Answer:
4
Step-by-step explanation:
-4x +6x +12 = 20
2x + 12 = 20
2x = 8
x = 4
Answer:
X=4
Step-by-step explanation:
-4x+6x+12=29
2x=8
x=4
Good luck .
Please help me with this
Answer:
x = 5
Step-by-step explanation:
Given
- 3x - 2 = - 17 ( add 2 to both sides )
- 3x = - 15 ( divide both sides by - 3 )
x = 5
HELP PLEASE.
Area=
If there is no value under the square root enter a 1.
10^2+16^2=100+256=356^2
The first box should be 2 and the second should be 356
hi, how can i graph the equation,
10i + 16p = t
?? thanks
which two ratios represent quantities that are proportional?
Answer:
C, because it equals in both sides
Answer:
The answer is C
Step-by-step explanation:
ANSWER CORRECTLY AND ILL MARK YOU AS BRAINIEST
Six containers have the following ounces in them: 6.2, 8.07, 9.4. 2.11, 5, 6.173 (Do not round your answer
Answer:
what is the question tho?
Answer:
Hi! The answer to your question is 36.953
Step-by-step explanation:
☆*: .｡..｡.:*☆☆*: .｡..｡.:*☆☆*: .｡..｡.:*☆☆*: .｡..｡.:*☆
☆Brainliest is greatly appreciated!☆
Hope this helps!!
- Brooklynn Deka
Answer and explanation
Answer:
392in
Step-by-step explanation:
find the areas of all the sides of this shape. Of one you might have to split it into two shpaes.
Please help!! I need answering
Answer:
B
Step-by-step explanation:
26x82=2132
2132/2=1066
Solve the quadratic equation by using either numeric or graphic approach x^2 + 2x - 3 = 0
Answer:
d
Step-by-step explanation:
[tex]x 1= \frac{ - b + \sqrt{ {b}^{2} - 4ac} }{2a} \\ x2 = \frac{ - b - \sqrt{ {b}^{2} - 4ac} }{2a} \\ x1 = \frac{ - 2 + \sqrt{ {2}^{2} - 4\times 1 \times ( - 3)} }{2} = 1 \\ x2 = \frac{ - 2 - \sqrt{ {2}^{2} - 4 \times 1 \times ( - 3)} }{2} = - 3[/tex]
Answer:
d
Step-by-step explanation:
Solving by factorising
Given
x² + 2x - 3 = 0 ← in standard form
(x + 3)(x - 1) = 0 ← in factored form
Equate each factor to zero and solve for x
x + 3 = 0 ⇒ x = - 3
x - 1 = 0 ⇒ x = 1
Mrs Fuller plants a 4 inch tomato plant in her garden. The tomato plant grows at a rate of 2 inches each week. Which equation can be used to determine h, the height of the tomato plant in inches after w weeks?
Answer: 4 + 2w
Step-by-step explanation:
The height of the tomato plant in inches after w weeks will be the value of the current height plus the weekly growth pee week. This can be represented in an equation as:
h = 4 + 2(w)
h = 4 + 2w
For example, the height of the tomato plant in inches after 5 weeks will be:
h = 4 + 2w
h = 4 + 2(5)
h = 4 + 10
h = 14 inches
which is the correct input-output table for the function g(x)=-1/2(4x+6)
Answer: The third choice.
Step-by-step explanation: To find the first output, start with your first input. In this case, it's -2, so your equation would be g(-2)= -1/2(4(-2)+6). Start by solving inside the parenthesis. 4x-2=-8 and -8+6=-2. -1/2x-2= 1, so your first output should be 1. The only choice that has this is the third one, so that is your answer. Hope I could help :)
Find the circumference of the circle.
A. 11 cm
B. 44 cm
C. 22 cm
D. 33 cm
Answer:
The answer is 44 cm .
which is (B)
need help asap i have 25minutes left
bac=57
Step-by-step explanation:
lmk=50
abc= 63 (if they are parallel)
3 3/4 x 4
Help me pas
Answer:
15 (C)
//msg added cus it was short//
-4(-2)+(-12)÷(+3)+-20+(+4)+(-6)
Answer:
-18
Step-by-step explanation:
[tex]-4(-2)+\frac{(-12)}{+3}-20+(+4)+(-6)=8-\frac{12}{3}-20+4-6=8-4-20+4-6=-18[/tex]
Answer:
-18Step-by-step explanation:
-4(-2)+(-12)÷(+3)+-20+(+4)+(-6). [B.E.D.M.A.S rule] (First bracket)
= 8 - 12 ÷ 3 - 20 + 4 - 6. (Then division)
= 8 - 4 - 20 + 4 - 6. (Then after addition)
= 8 + 4 - 4 - 20 - 6
= 12 - 30. (At last subtraction)
= -18 (Ans)
PLEASE HELP!!!
This graph shows the relationship between demand and price for goods sold at a shop. Anna plots the data on a scatter plot and draws a line of best fit to represent the relationship as shown.
This is not the line of best fit because the line ____________.
A.) Is close to the data points
B.) does not fit every data point exactly.
C.) Is not through the middle of the data points.
Anna could get a better fit by _____
A.) Decreasing
B.) Increasing
C.) Keeping
the y-intercept and ______ the slope.
A.) Decreasing
B.) Increasing
C.) Keeping
Answer:
1st question: C
2nd question: Increasing (the slope)
3rd question: don't understand what's being asked
Step-by-step explanation:
Answer:
the answers are
Step-bythe answers are -step explanation:
1.C
2.a
3.B
Diana finished 5/8 of her homework. what percentage is equivalent to the fraction of homework that Diana completed
Answer:62.5%
Step-by-step explanation:
What value of x makes the equation true?
3 - 14x = 17
A-1
B-1
C-28
D-2
Answer:
3 -14x =17
-14x = 17 - 3
-14x = 14
x = 14/-14 = 1/-1 = -1
∴ answer = -1
hope this answer helps you.....
please mark as brainliest... thank you!
Solve for x. Use the photo for the chord
Answer: x=3
Step-by-step explanation:
What does the y-intercept represent in the graph below?
PLEASE HELP ASAP ILL MARK BRAINLY IF U DO
Answer:
34.1 is the answer by Pythagoras thereom
Note Figure is not drawn to scale.
If r= 2 cm and h = 2 cm, what is the surface area,
in terms of r?
Answer:
your answer is...
Step-by-step explanation:
50.265482457437
I used my calculator
I'LL GIVE YOU 5 STARES HELP. Find the area of the figures shown below and drop the correct result Into the appropriate blank. DRAG & DROP THE ANSWER 14 cm 55 cm 8 cm 11 36 m² 5 cm 38 cm 8 cm 58 cm 39 m2 8 m 40 m² 11 4 m 70 cm 10 m
Module 19 - Reflections
Assignment Active
Practice working with reflections.
Assignment
y
M(-5, 4)
M'(5, 4)
What is the rule for the reflection?
ry-axis(x, y) - (x, y)
P'y-axis(x, y) - (x,-y)
* rx-axis(x, y) (-x, y)
Orx-axis(x, y) = (x,-y)
2
L(-6,2)
N(-3,2)
N'(3,2)
L'(6,2)
x
-2
2
-2
Answer:
R y-axis (x,y) to (-x,y)
Step-by-step explanation:
The rule for reflection is [tex]r_y[/tex] axis (x, y) -> (-x, y).
What is Transformation?A transformation is a broad phrase covering four distinct methods of changing the shape and/or position of a point, line, or geometric figure.
The original shape of the object is known as the Pre-Image, and the final shape and location of the object is known as the Image during the transformation.
As per the figure. the coordinates of Triangle LMN are
L(-6, 2),
M(-5, 4)
N(-3, 2)
and, the coordinates of Triangle L'M'N' are
L'(6, 2),
M'(5, 4)
N'(3, 2)
Here, the y coordinate is same only the sign of x coordinate change.
So, the rule for reflection is r y- axis (x, y) -> (-x, y).
Learn more about Transformation here:
https://brainly.com/question/13801312
#SPJ7
Hello! Sorry about My last question! I was lying this is just a Homework assignment and it is completion Credit but if you do it I will still give you the brainliest!
To find the percent of something, turn the percent into a decimal and multiply (move the decimal place 2 places left, e.g. 53% = .53)
solve for X
7x=49 (brainliest)
Answer:
7
Step-by-step explanation:
divide 7 to both side
7x/7=49/7
x=7
Plzzzz asappp help thanks
Answer:
I might not be right but try following the steps in the screen shot
Also the answer is in the screenshot
Step-by-step explanation:
I tried my best. :>
Plz help i don't wnat links i want you to show the answer on here i trust you will.
A=__in^2 i will give the brainlist 20 points btw
Answer:
a to L is 12 inches and a to n is 32 in Step-by-step explanation: