help me guys pls pls pls
Lesley has 180 y marbles in a bag. She gave 2/5 of the marbles to Danny. How many marbles does Lesley have left?
Round your answer to the nearest hundredth.
Answer:
66.42 degrees
Step-by-step explanation:
Cos(angle B) = adj / hyp = 2/5
arc cos (2/5) = angle B = 66.4 2 degrees
If 10 g of a radioactive substance are present initially and 4 yr later only 5.0 g remain, how much of the substance, to the nearest tenth of a gram, will be present after 9 yr?
Answer:
3.15g
Step-by-step explanation:
2.2 g of the substance, to the nearest tenth of a gram, will be present after 9 yr.
What is the formula for exponential growth and exponential decaying function?The formula for exponential growth is y = y₀.e^(kt).
The formula for exponential decay is y = y₀.e^(-kt).
Given, 10g of a radioactive substance is present initially and 4 yr later only 5.0g remain.
∴ y₄ = y₀.e^(kt).
5 = 10.e^(4k).
e^(4k) = 1/2.
lne^(4k) = ln(1/2).
4k = - 0.69.
k = - 0.69/4.
k = - 0.17.
At this rate after 9 years later the amount of substance left will be,
y₉ = 10.e^(-0.17×9).
y₉ = 10.e^(-1.53).
y₉ = 10/e^(1.53).
y₉ = 10/4.62.
y₉ = 2.16 g.
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The probabilities by subject of on-time assignment submission and on-time arrival in class are given in the table. Subject On-time Assigment Submission On-time Arrival in Class Physics 89.7% 82.3% Math 88.2% 88.7% Chemistry 89.4% 83.1% Biology 90.1% 82.4% Total 88.5% 84.7% What is the probability of on-time arrival in class given that the subject is biology? A. 90.1% B. 88.5% C. 84.7% D. 82.4% E. insufficient data
The probability of on-time arrival in class given that the subject is biology is, 82.4%.
What is mean by Probability?The term probability refers to the likelihood of an event occurring. Probability means possibility. It is a branch of mathematics that deals with the occurrence of a random event. The value is expressed from zero to one.
Given that;
The probabilities by subject of on-time assignment submission and on-time arrival in class are given in the table.
Here, the table is,
Subject: On-time Assignment: On-time Arrival to Class:
PHYSICS 89.7% 82.3%
MATH 88.2% 88.7%
CHEMISTRY 89.4% 83.1%
BIOLOGY 90.1% 82.4%
TOTAL 88.5% 84.7%
Now, from table;
The probability of on-time arrival in class given that the subject is biology is, 82.4%.
Hence, the probability of on-time arrival in class given that the subject is biology is, 82.4%.
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HELP ME OUT PLS!!!!!
What is the volume of this cone? Use 3.14 for and round your answer to the nearest tenth. In your answer, give the volume of the cone rounded to the nearest tenth, and then explain how you calculated it. (Note: type out all of your work AND type out your explanation for FULL credit.)
We observe that the
height of the cone is 8 in.
radius of the cone is 2 in.
Volume of a cone = 1/3 π r² h
where R = radius and h = height
Using the formula we get :
Volume = 1/3 π 2 × 2 × 8
= 32 / 3 π cm³
= 33.5 cm³ ( rounded to 10)
Lois made a dish with 3 1/3 cups of pasta. One serving of the pasta is 0.4 cups. How many servings of pasta were in the dish Lois made?
Answer:
8 3/4
Step-by-step explanation:
because each serving is 04 cups all you need to do is divide 3 1/2 by 0.4.
first convert 3 1/2 into decimal which would be 3.5. then divide 3.5 by 0.4
3.5/0.4
=3.5x10/0.4x10
=35/4
=8 3/4
what the answer to this?
Answer:
1/5
Step-by-step explanation:
jack + 4 friends = 5 people
5 people would each get 1 slice
Write an algebraic expression for the following word phrase. The quotient of 69 and x
Hello!
_____
The quotient of two numbers means we divide one number by another number.
Example :-
The quotient of 6 and a number:-
6÷x
According to the example above, the algebraic expression looks like so:-
69÷x
note:-Hope everything is clear; if you need any explanation/clarification, kindly let me know, and I will comment and/or edit my answer :)
Please help me I’ll mark brainly
Answer:
Step-by-step explanation:
In the first equation, -4 x -b should be postive 4b, so +4b, because a negative times a negative equals a postive
Answer: 7
Step-by-step explanation: -4(6 - b) = 4
-24 + 4b = 4
The negative turns into a postive for 4b because two negatives make a postive.
4b (positive) = 28
b = 7
How do I do show my work using Brainly math?
Step-by-step explanation: please see attached to PDF document.
Answer:
a) 6
b) 1/3
c) 2
Step-by-step explanation:
a) 3 ( x + 1 ) - x = 15. expand the bracket
3x + 3 - x = 15
2x + 3 = 15. collect the like terms
2x = 15 - 3.
2x = 12.
x = 12/2 = 6
b) 5 ( x + 2 ) - 2x = 11. expand the bracket
5x + 10 - 2x = 11
3x + 10 = 11. collect the like terms
3x = 11 - 10
3x = 1
x = 1/3
c) 6 ( 1 - 2x ) = - 4 - 7x. expand the bracket
6 - 12x = -4 -7x. collect the like terms
6 + 4 = -7x + 12x
10 = 5x
or
5x =. 10
x = 10/5 = 2
PLEASE MARK ME BRAINLIEST
if right triangle RST, ST = 5, RT = 12, and RS = 13. Find tan (S).
Answer:
tan(S) = 12/5
Step-by-step explanation:
The mnemonic SOH CAH TOA reminds you the tangent ratio is ...
Tan = Opposite/Adjacent
In the given triangle, the side opposite angle S is RT, which has length 12. The side adjacent to angle S is ST, which has length 5. Then the tangent of angle S is ...
tan(S) = RT/ST
tan(S) = 12/5
_____
Additional comment
The rest of the trig functions in this triangle are ...
sin(S) = 12/13
cos(S) = 5/13
tan(R) = 5/12
sin(R) = 5/13
cos(R) = 12/13
Answer:
tan(S) = [tex]\frac{12}{5}[/tex]
Step-by-step explanation:
Hi there!
We are given ΔRST, where ST=5, RT=12, and RS=13
We want to find the tangent of angle S (the notation tan(S) means "tangent of angle S")
In trigonometry, tangent refers to the ratio of the opposite side/adjacent side.
The opposite side is the side that is opposite to the angle that we are referencing (in this case, angle S); in this case, that side is RT, which is 12
The adjacent side is the leg that is adjacent to the opposite side; in this case, that side is ST, which we were given as 5
Therefore, tan(S) will be [tex]\frac{RT}{ST}[/tex], or [tex]\frac{12}{5}[/tex].
Hope this helps!
1. Solve the following equations for x:
a. X - 9 = -21
b. 10 + x = 112
C. 14 = x - 30
d. 12 - x = 3
Answer:
A. X=-12B. X=102C. X=44D. X=15Step-by-step explanation:
Isolate the term of x from one side of the equation.
Part A. x-9=-21First, add by 9 from both sides.
x-9+9=-21+9
Solve.
-21+9=-12
X=-12
Part B. 10+x=112Switch sides.
x+10=112
Subtract by 10 from both sides.
x+10-10=112-10
Solve.
112-10=102
X=102
Part C. 14=x-30Switch sides.
x-30=14
Add by 30 from both sides.
x-30+30=14+30
Solve.
x=44
Part D. 12-x=3Switch sides.
x-12=3
Add by 12 from both sides.
x-12+12=3+12
Solve.
Add the numbers from left to right.
3+12=15
x=15
Therefore, the correct answer is part A: x=-12, part B: x=102, part C: x=44, and part D: x=15.I hope this helps you! Let me know if my answer is wrong or not.
If you create an app similar to brainly, what things you gonna to change in this ?
Answer:
The
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section
It's difficult to access
It's also really
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to what you could type.
Contort 39 to base five
What is the equation of the line that passes through the point (-6, -3) and has a
slope of 0
Answer:
Answer: the equation of the line is y=−3.
Step-by-step explanation:
Since the slope equals 0, then the line is horizontal.
This means that the equation of the line doesn't contain x.
Thus, the equation of the line is y=−3.
Find the area of the plane figure :
Answer:
99.9 [tex]cm^{2}[/tex]
Step-by-step explanation:
Given, AB=13 cm, BC=4 cm
AC is the diagonal of parallelogram ABCD.
Also AC=16 cm
We know, △ABC≅△ACD [S−S−S Congruence]
Also, area of parallelogram ABCD = Area of △ABC + Area of △ACD
= 2 × Area of △ABC
= [tex]2\sqrt{s(s-13)(s-4)(s-15)}[/tex]
[tex]s= \frac{13+15+4}{2}[/tex] = [tex]2\sqrt{16(16-13)(16-4)(16-15)}[/tex]
= 16 = 99.9
I need the answer to this as well
Answer:
Option C.
Step-by-step explanation:
Perimeter = 2L + 2h
[tex]P=2(5x^{2}y) +2(3y^{3} )=10x^{2} y+6y^{3}[/tex]
Hope this helps
The length of a rectangle is six times its width.
If the perimeter of the rectangle is 126 in, find its area. Answer in inch ^2
Answer:
486 square inches.
Step-by-step explanation:
126 = w + 6w + w + 6w
126 = 14w
width = 9 inches
A = wl
A = (9)(9*6)
A = 486 square inches
A florist used 16 flowers to make a bouquet, including 6 lilies.
What is the probability that a randomly selected flower will be a lily?
Answer:
3/8
Step-by-step explanation:
Values we are given :
16 flowers in total6 liliesWe know that :
Probability of selecting an object from a group of items = Number of objects / Number of itemsTherefore,
Probability of selecting a lily = Number of lilies / Number of flowersP = 6/16P = 3/8which statement correctly compares the shapes?
Answer:
I believe D should be the correct answer
help please, i don’t understand this question
What is the probability of getting a number greater than 2 on two rolls of a six-sided die both
times?
a. 2/6
b.4/6
c.4/3
d.3/6
e.4/9
Answer:
[tex]Probability = \frac{4}{9} [/tex]
Given:
The die was rolled twice having six sides,
To find:
probability of getting a number greater than 2 =?
solution:
The probability of getting a number greater than 2 on single roll =
[tex] \frac{4}{6} = \frac{2}{3} [/tex]
Similarly on second roll the probability would be
[tex] \frac{2}{3} [/tex]
Since two events are occurring together, the total probability of finding number greater than 2 in both rolls =
[tex] \frac{2}{3} \times \frac{2}{3} = \frac{4}{9} [/tex]
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please answer correctly :)
i think its 8,770 wbu
help??
Answer:
Your answer would be 8,770.
Step-by-step explanation:
the numbers list as 0,085-0,785-0,870-7,780-8,750-8,770 so you would be correct saying that 8,770 is the largest number.
Find all real numbers x such that
3x - 4 >5 and 8x - 19 < 21
Answer:
Answer:
1) x>3
2) x<5
hope this helped
(бх -Зу = 9
Solve y=2x-5
-
Answer:
6x-3(2x-5)=9
6x-6x+15=9
15=9
no sollution
Write an equation of the line with a slope of -3 and y -intercept of 0 .
y=
Answer:
y=-3x
Step-by-step explanation:
Suppose that the first four moves of a tic-tac-toe game are as shown.
Does the first player (whose moves are marked by Xs) have a strategy that will always win? (If no, explain why. If yes, show the winning strategy in a form of a game tree)
The first player using Xs does indeed have a strategy to always win by placing an X in the Middle right box.
Why is this a winning strategy?When the first player places an X in the middle right spot, the second player will have to place an O in two places to avoid the first player winning.
They would have to place an O in the middle left space and in the bottom right space. Seeing as they can't place an O in two boxes at once, the first player will be able to place an X in the empty box out of the two, and win.
In conclusion, there is a winning strategy.
Find out more on strategy in tic-tac-toe at https://brainly.com/question/15262069.
Step-by-step explanation:
The first player has two possible winning moves.
1. Middle right boxRegardles the next move the first player has one of the two options next: middle left or bottom right box
2. Bottom right boxRegardles the next move the first player has one of the two options next: middle right or top left box
I need help please i
Answer:
2 7/24
Step-by-step explanation:
First we have to add the gallons of two cow of each owner:
Hank's cows: 4 3/4 + 4 1/8
Add the whole numbers:
4 + 4 = 8
Now for 3/4 and 1/8
Find common
6/8 + 1/8
= 7/8
Put together :
8 7/8
Debra's cows: 5 1/2 + 5 2/3
Add the whole number
5 + 5 = 10
Now for 1/2 and 2/3
3/6 + 4/6
1 1/6
10 + 1 1/6
= 11 1/6
Since now we know that:
Hank - 8 7/8
Debra - 11 1/6
we can solve the question:
How many more gallons of milk did Debra's two cows produce on that compared to Hank's two cows?
Solution:
11 1/6 - 8 7/8
Subtract whole number
11 - 8 = 3
Now for 1/6 and 7/8
4/24 - 21/24
4-21/24
-17/24
2 7/24
~lenvy~
Answer:
2 7/24
Step-by-step explanation:
Hank Cows:
4 3/4 and 4 1/8
Debra Cows:
5 1/2 and 5 2/3
To find the difference between Hank cows and Debra cows..
we first have to add both cows together:
4 3/4 + 4 1/8 = 8 7/8 {Hank}
5 1/2 + 5 2/3 = 11 1/6 {Debra}
Since now we know Hank and Debra total gallons of milk we can solve and find out the difference.
11 1/6 - 8 7/8 = 2 7/24
Hence, Debra have 2 7/24 more gallons of milk than Hank.
[RevyBreeze]
