Answer:
75
Step-by-step explanation:
175= 25+2a
The number of laps that Swimmer A swam was 50 laps.
How to form mathematical expression from the given description?You can represent the unknown amounts by the use of variables. Follow whatever the description is and convert it one by one mathematically. For example if it is asked to increase some item by 4 , then you can add 4 in that item to increase it by 4. If something is for example, doubled, then you can multiply that thing by 2 and so on methods can be used to convert description to mathematical expressions.
Let we suppose that:
Swimmer A swam x lapsSwimmer B swam y laps.Then, according to the given data, we have:
x + y = 175 laps
y = 25 + 2x (25 more than twice of laps of A is the number of laps of B).
Thus, we get a system of two equations as:
[tex]x + y = 175\\y = 25 + 2x\\[/tex]
From second equation, putting value of y in first equation, we get:
[tex]x + (25 + 2x) = 175\\3x + 25 = 175\\3x = 150\\\\x = \dfrac{150}{3} = 50 \: \rm laps[/tex]
As x is the number of laps Swimmer A swam, thus, the number of laps that Swimmer A swam was 50 laps.
Learn more about solving system of linear equations here:
https://brainly.com/question/13722693
Can u solve this please? Pythagorean theorem
Answer:
12.8 ft or exactly sqrt 164
Step-by-step explanation:
Pythagoreans is a^2+b^2=c^2
10^2+8^2=164
sqrt 164 = 12.8 ft
What is the volume of a sphere having a diameter of 6 cm?
help pls geometry volume
You go to Kohl's to purchase retro jordan shoes for $74.99. Kohl's is offering in-store discount at 30%. You Kohl's dollar coupon for another 20% off. What is the price of the shoes before tax?
Answer:
41.99
Step-by-step explanation:
74.99*(100%-30%)
52.493
52.493(100%-20%)
41.99
3x + y + 2x + 2y – 3
Simplify Expressions by Combining Like Terms
If x = 2, y = 3 and z = 5, calculate the following: 5x - z
The rectangular top of Kathleen's desk has a length of 24 inches and a width of 17 inches. What is the area of the top of Kathleen's desk in square inches?
Answer:
408 square inches
Step-by-step explanation:
The top of the desk is Rectangular.
The area of a rectangle = Length × Width
Length = 24 inches
Width = 17 inches
Area of the rectangular top = 24 inches × 17 inches
= 408 square inches
Therefore, the area of the top of Kathleen's desk in square inches is 408 square inches
Solve: 16х2 - 81 = 0. (2 points)
Ox = 4, 9
Ox= -4, -9
ООО
9
х=
О
х
81
16
16
HELP PLEASEEE
Answer:
x=9/4,x=-9/4
Step-by-step explanation:
16x^2−81=0
Step 1: Add 81 to both sides.
16x^2−81+81=0+81
16x^2=81
Step 2: Divide both sides by 16.
16x^2/16 = 81/16
x^2 = 81/16
Step 3: Take square root.
x = ±√81/16
x=2.25,x=−2.25
Convert to fraction form.
x=9/4,x=-9/4
Determine the quadratic curve of best fit for the data. Then estimate what the value of will be when = −4. {(−3,2), (0,5), (1,7.3), (−1,3.3), (−6,5), (−7,7.3)} Answer choices 4.3 5.3 3.3 2.3
Answer:
The value of 'y' when x = -4 is 2.3
Step-by-step explanation:
Curve of best fit can be found by plotting the points on MS Excel and drawing a curve that goes through the points as shown in the attached graph
The equation that approximate the curve from which the y-value at a x-value of -4 can be estimated is found as follows
The general equation for a quadratic equation is y = a·x² + b·x + c
Therefore, we get;
2 = a·(-3)² + b·(-3) + c
2 = 9·a - 3·b + c
5 = 0·a + 0·b + c
5 = c
7.3 = 1·a + 1·b + c = a + b + 5
7.3 = a + b + 5
2.3 = a + b
2 = 9·a - 3·b + 5
-3 = 9·a - 3·b
Solving gives;
a = 13/40, b = 79/40
The equation of the quadratic curve is therefore;
y = (13/40)·x² + (79/40)·x + 5
When x = -4, we get;
y = (13/40)·(-4)² + (79/40)·(-4) + 5 = 2.3
When x = -4, y = 2.3
Plotting the points on MS Excel we find from the attached graph that the estimated value of 'y' when x = -4 is as calculated (2.3).
CAN YALL HELP ME WITH THIS ITS HARD PLZ HELP I GIVE BRAINLEST
Answer:
sure whats the problem
Step-by-step explanation:
Sandra is 30 years old and deciding which investment she would like to make. She has $2,500 to invest.
Option A: Invest $2,500 and earn 3% of its value each year.
Option B: Invest $2,500 and earn $200 per year.
How many years would it be when both investments would yield the same amount of earnings?
Group of answer choices
??? which one
Each year, roughly 100 computer programmers each make about $
105. How much money is this all together? Express your answer both
as a power of 10 and as a dollar amount.
The system of linear equations represented in the graph is ______
The solution of this system of equations is ____
Answer:
(- 3, - 5 )
Step-by-step explanation:
The solution to a system of equations given graphically is at the point of intersection of the 2 lines.
The lines intersect at (- 3, - 5 ) ← solution
Answer:
The system of linear equations represented in the graph is y=x-2, y=3x+4.
The solution of this system of equation is (-3,-5)
PLS HELP I WILL MARK BRAINLIEST!!
You want to take some of your friends to see a movie Movie tickets cost $9 at the local theatre. You will purchase a bucket of popcorn for $7.50. How many friends can you take if you spend at most $79.50. Write the inequality and solve it.
Answer: 8 friends
Step-by-step explanation: 79.5-7.50 72
72/9 8
Can someone please help me on this I beg you please
Answer:
b
Step-by-step explanation:
b
i don’t understand how to solve this
Which of these is a simplified form of the equation 15x + 4 = 5 + 3x + 1x? (2 points)
0 3x = 9
0 3x = 11
O 11x = 9
0 11x = 1
Answer:
11x=1
Step-by-step explanation:
15x+4=5+3x+1x Bring everything with an x in front of it to the left side
15x-3x-1x+4=5 Simplify the x values
11x+4=5 Bring the 4 to the right side
11x=5-4
11x=1
i have no one to talk to
Answer:
Hiiiiiii :)
Step-by-step explanation:
PLEASE HELP ASAP!!!!!!! I DONT HAVE MUCH TIME! 15 POINTS❗️
Answer:
negative slope, y= -x+2
Step-by-step explanation:
Solve by graphing -3x + y = 4 y = -2x - 1
Answer:
(-1,1)
Step-by-step explanation:
Malcolm is filling bags with rice. He starts with a 5
1 over 4 pound container of rice and fills each
bag with pound of rice. How many bags of rice can Malcolm fill?
(I think that says 51...)
Basically all you do is multiply 51 by 4
51
x 4
104
The answer (if those numbers are correct) is 104.
Graph the equation y=-x^2-12x-35y=−x 2−12x−35 on the accompanying set of axes. You must plot 5 points including the roots and the vertex.
please help and explain I'm very confused and I have no idea what to do.
The graph of y=-x^2-12x-35 is attached and it has x intercepts at x=-7 and x=-5 and vertex is at (6, -107).
What is quadratic equation?A quadratic equation is a second-order polynomial equation in a single variable x , ax²+bx+c=0. with a ≠ 0 .
To graph the equation y=-x^2-12x-35, we can start by finding the x-intercepts (or roots) and the vertex of the parabola.
To find the x-intercepts, we can set y=0 and solve for x:
0 = -x² - 12x - 35
Using the quadratic formula, we get:
x=-b±√b²-4ac/2a
x=12±√144-140/2(-1)
x=12±√144-140/(-2)
x=12±2/(-2)
The x-intercepts are approximately x=-7 and x=-5
To find the vertex, we can use the formula x=-b/2a to get the x-coordinate, and then substitute it into the equation to get the y-coordinate:
x = -b / 2a = -(-12) / 2(-1) = 6
y = -x² - 12x - 35 = -(6)^2 - 12(6) - 35 = -107
So the vertex is at (6, -107).
Hence, the graph of y=-x^2-12x-35 is attached and it has x intercepts at x=-7 and x=-5 and vertex is at (6, -107).
To learn more on Quadratic equation click:
https://brainly.com/question/17177510
#SPJ2
Vincent gathered groups of 1 to 8 people and gave every group the same puzzle to solve. He recorded the
number of minutes it took each group to solve the puzzle and plotted the results.
Which statement is the best description of the association between these variables?
The statement that best describes the association of these variables is larger groups tend to take less time to solve the puzzle.
What is the true statement?A graph can be described as a pictorial representation of data. A graph has a x axis and a y-axis. The x-axis in this graph is the number of people in the groups and the y-axis is the time it takes to solve the puzzle.
The graph slopes downwards. This indicates that as the number of people in the groups increase, the time it takes to solve the puzzle decreases.
To learn more about graphs, please check: https://brainly.com/question/21527145
#SPJ1
Answer:
Nonlinear association
Step-by-step explanation:
Please like if this helps :)
help m.e please please
Answer:
(-3, -4)
Step-by-step explanation:
The solution is where the two lines intersect. Therefore, the x-coordinate is -3, and the y-coordinate is -4.
Another way to solve this would be to set the to equations equal to each other, so 2x+2 = -4. Therefore, 2x = -6, and x = -3. And from the second equation, y = -4.
Watching your neighbors toddlers for $15/1.5 hours or babysitting your cousins for the day for $60/8 hours. Which one pays more?
Answer:
.
Step-by-step explanation:
Answer:
Babysitting your cousins
Step-by-step explanation:
Becauss 15/1.5 is 3. And 60/8 is 7.5
Expressions equivalent to 3^10
Answer:
59049+0
59048.1+0.9
59048.01+0.99
...
Step-by-step explanation:
There's infinite.
[tex]\huge\text{Hey there!}[/tex]
[tex]\mathsf{3^{10}}[/tex]
[tex]\mathsf{= 3\times 3\times3\times 3 \times 3\times 3\times3\times3\times3\times3 }[/tex]
[tex]\mathsf{3\times3 = \bf 9}[/tex]
[tex]= 9\times9\times 9\times 9\times9[/tex]
[tex]\mathsf{9\times9 = \bf 81}[/tex]
[tex]\mathsf{= 81\times81\times 9}[/tex]
[tex]\mathsf{81 \times 81 = \bf 6,561}[/tex]
[tex]\mathsf{= 6,561\times9}[/tex]
[tex]\mathsf{\bf = 59, 049}[/tex]
[tex]\boxed{\boxed{\large\text{Answer: \huge \bf 59,049}}}\huge\checkmark[/tex]
[tex]\text{Good luck on your assignment and enjoy your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
Leslie has a watering can that holds 1 liter of water. She uses 250 milliliters of water on each of her plants. How many plants can she water? *remember 1L = 1000 milliliters of water
Answer:
4 plants
Step-by-step explanation:
convert the capacity of the watering can to millimeters
1L = 1000 milliliters
1 x 1000 = 1000 millimeters
Plants that can be watered = capacity of the watering can / amount of water a plant needs
1000 / 250 = 4 plants
This Question: 1 pt
20 of 20
This Qu
th
The pH of a fruit juice is 2.9. Find the hydronium ion concentration, [H30 * ), of the juice. Use the formula pH = -log[H30*]
The hydronium ion concentration [H30 + ] is approximately moles per liter.
(Use scientific notation. Use the multiplication symbol in the math palette as needed. Round to the nearest tenth as needed.)
Answer:
scientific" (and any subsequent words) was ignored because we limit queries to 32 words.
Your search - This Question: 1 pt 20 of 20 This Qu th The pH of a fruit juice is 2.9. Find the hydronium ion ... - did not match any documents.
Suggestions:
Make sure that all words are spelled correctly.
Try different keywords.
Try more general keywords.
Try fewer keywords.
PLEASEEEEEEEEEEEEEEEEEEEEEEEEEEEEE HELPPPPPPPPPPPP
Answer:
L=74
W=77
Step-by-step explanation:
Answer:
L=74 and W=77
Step-by-step explanation:
first the area of a rectangle is length of breath
A=L X W
4514= L X 61
61L=4514
L=4514/61
L=74m
b. perimeter =2(L + W)
338=2*92+ 2W
338=184+2W
2W=338-184
2W=154
W=154/2
W=74
Solve for the missing value.
58
i think it is 58 degrees