Answer:64.62
Step-by-step explanation:
Step-by-step explanation:
Ocho veces un número es restado de dos veces su
recíproco. El resultado es 15. Halla el número.
Resolviendo una ecuación cuadratica, veremos que el número puede ser -2 o 1/8.
¿Como transformar una oración en una ecuación?
Partimos de la oración matematica:
"Ocho veces un número es restado de dos veces su recíproco. El resultado es 15. Halla el número."
Primero vamos a definir al número como x.
El reciproco de x es la inversa, es decir, 1/x.
Entonces, a 2 veces ek reciproco de x, le restamos 8 veces x, y eso va a ser igual que 15.
2/x - 8*x = 15
Ahora podemos resolver esto para x, primero multiplicamos a ambos lados por x:
2 - 8x^2 = 15x
-8x^2 - 15x + 2 = 0
Esto es una ecuación cuadratica, las soluciones van a ser:
[tex]x = \frac{-(-15)\pm \sqrt{(-15)^2 - 4*(-8)*2} }{2*(-8)} \\\\x = \frac{15\pm 17}{-16}[/tex]
Entonces tenemos dos soluciones:
x = (15 + 17)/-16 = -2
x = (15 - 17)/(-16) = 1/8
El número puede ser -2 o 1/8.
Sí quieres aprender más sobre ecuaciones cuadraticas, puedes leer:
https://brainly.com/question/14013122
What is the value of u?
32
90
Answer:
58º
Step-by-step explanation:
angles on a straight line = 180º
90 + 32 = 122
180 - 122 = 58
Find the inverse function f -1(x) of the given function f(x).
f(x) = 6 - 0.75( 2x - 4 )
Answer:
Step-by-step explanation:
5. Are x and y proportional? Explain Pls helppp me
30 POINTS!!
Answer:
No
Step-by-step explanation:
No, because the rates are not the same for X and Y
Y= - x^2 + 4x + 6 in vertex form
[tex] \rm \color{lime}(2,10)[/tex]
step-by-step explanation:
[tex]\rm \color{lime}y = - {x}^{2} + 4x + 6[/tex]
identify the coefficients[tex]\rm \color{lime}a = - 1,b = 4[/tex]substitute the coefficient into the expressionfind the x-coordinate of the vertex by substituting a = - 1 and b=4 [tex] \tt \tiny \: x = - \frac{b}{29} [/tex][tex]\rm \color{lime}x = - \frac{4}{2x( - 1)} [/tex]
solve the equation for Xfind the y-coordinate of the vertex by evaluating the function for x = 2[tex]\rm \color{lime}y = - {x}^{2} + 4x + 6,x = 2[/tex]
calculate the function value for x = 2[tex]\rm \color{lime}y = 10[/tex]
since the value of the function is 10 for x = 2 the vertex of the graph of the quadratic function is a (2,10)[tex] = \rm \color{hotpink} (2,10)[/tex]
hope it helps
Answer:
y = - (x - 2)² + 10
Step-by-step explanation:
the equation of a parabola in vertex form is
y = a(x - h)² + k
where (h, k ) are the coordinates of the vertex and a is a multiplier
To obtain this form use the method of completing the square
y = - x² + 4x + 6 ( factor out - 1 from the first 2 terms )
y = - (x² - 4x) + 6
To complete the square
add/subtract ( half the coefficient of the x- term )² to x² - 4x
y = - (x² + 2(- 2) + 4 - 4) + 6
y = - (x - 2)² + 4 + 6
y = - (x - 2)² + 10 ← in vertex form
2.3x10^8 + 4.7x10^7 =
10^8 and 10^7 is the superscript in Canvas
Group of answer choices
27.7x10^7
2.77x10^8
6.6x10^15
None of the above
Step-by-step explanation:
both of a and b are correct but I don't know how...
please help :( put them in the correct spot . Due in 10 minutes!
Answer:
hello
Step-by-step explanation:
I'd put chemical or physical process in which rocks are worn down by in erosion and carrying away of soil rock and other materials in weathering.
Hope this helps
anyone pls help me in qn 6 pls
Answer:
Step-by-step explanation:
I don't know if this is what your looking for but the 38 cars that are 10 years old are 45.78 in percentage and the 5 cars that are more than 20 years are 6.02 in percentage.
(if you are asking how much more percentage to get from 6.02 to 45.78 its 39.76)
I really did not get the question but hope it help a bit.
Answer:
(A) 46% (B) 13%
Step-by-step explanation:
First we can find the percentage of cars that are at least 10 years old by dividing the amount that are 10+ years old by the total amount of cars
[tex]38/83= 0.45783[/tex]
when made into a percentage that is 46%
Now we can find the percentage of those cars that are 20+ years old by dividing the number of 20+ year old cars by our percentage
[tex]5/38=0.13157[/tex]
When made into a percentage That is 13%
Hope this helps! :)
Thomas has to bring home $10.00 change but he wants to buy 2 hamburgers for his sisters will he have enough money to purchase the burgers ?
(2 hamburgers is 2.25)
8
Step-by-step explanation:
you would do 10 divide by 2.25 and that's 4.4 but you can't by half a hamburger so you round down to 4 and then you times 4x2 because it's 2.25 for two hamburgers so your answer is 8.
I really really need this. Please help. Thankyouuu!!!
Answer:
2. 131
3. 8
4. 69
Step-by-step explanation:
2.
√5607
=131
3.
10cm, √9cm, 8cm
4.
372−1300
=1369−1300
=69
Melissa walks 3 miles to the house of a friend and returns home on a bike. She averages 4 miles per hour faster when cycling than when walking. The total time for the round trip is 2 hours. Find her speed walking and biking. Set up an equation and solve
SHOW WORK PLS!!
Answer: Melissa's walking speed is 2mph. Her biking speed is 6mph
Step-by-step explanation:
Her total distance is 6 miles, because she walks 3 miles, and so the returning distance must also be 3.
Let her cycling speed (in mph) be x
Let her walking speed (in mph) be y
We know that x = y + 4
Since we know that S = D/T:
T = D/S
So her cycling time must be: T = 3/x
and her walking time must be: T = 3/y
since we know that x = y + 4, we can substitute this into her cycling time, and rewrite it as T = 3/y+4
we also know that 3/y+4 + 3/y = 2, because the problem says that the total time taken was 2 hours.
We simply need to solve this equation now:
3/y+4 + 3/y = 2
The LCD for y+4 and y is y² + 4y
so now we have:
(3y/y² + 4y) + (3y+12/y² + 4y) = 2
(6y + 12)/y² + 4y = 2
6y + 12 = 2y² + 8y
2y² + 2y - 12 = 0
Solve this using factoring:
2y² + 2y - 12 = 0
2(y² + y - 6) = 0
(y+3)(y-2) = 0
using ab = 0, then a or b =0:
y = -3, or y = 2
Since speed cannot be negative, our answer is 2 for y. So y, or the walking speed is 2mph. Since x = y + 4, we know that x = 6 mph
Melissa's walking speed is 2mph. Her biking speed is 6mph
What does AxB equal in I-ready Math?
if y=x(x+5)+6 find vertex and roots
Answer:
-5/2,-1/4
Step-by-step explanation:
please help me solve for x
Answer:
can you show a picture
Step-by-step explanation:
it depends on the situation and the problem but normally you would use the other numbers to figure out what number goes in "x"
Need more information to solve for x.
Can I get some help!
Answer: See below
Step-by-step explanation:
The usage of passive income instead of collecting and saving your money without risking a loss through investments:
Passive income is money that you make without having to perform a lot of "active" work to keep it. In essence, you may complete the most of the work upfront and put in some extra effort along the secondary source of income.
Passive income reduces your stress, anxiety, and fear of the future unless there are extremely high-risk investments.It allows you to pursue doing the things you love rather than what pays the bills.Passive income gives you the ability to live and work from anywhere.Shelly is planting grass seed in her backyard, as shown by the shaded part of the model.
15 ft
Shelly will use 1 pound of grass seed for every 125 11?
How much grass seed will she need?
15 ft
20 ft
Use the number pad to enter your answer in the box
10 ft
10 ft
+
pounds
20 ft
2
N
3
4
5
2 of 5
Completed
Finish Later
Shelly would need 5 pounds of grass seed to plant in her backyard.
What is an area?Area is the amount of space occupied by a two dimensional shape or figure.
From the image:
Area of the backyard = (10 + 15) * (10 + 20) = 750 ft²
Area of triangle = (1/2) * 10 * 10 = 50 ft²
Area of small rectangle = (25 - 20) * (30 - 15) = 75 ft²
Area of shaded part = 750 - 50 - 75 = 625 ft²
1 pound of grass seed covers 125 ft², for 625 ft²:
Amount of seed = 625 ft² * 1 pound per 125 ft² = 5 pound
Shelly would need 5 pounds of grass seed to plant in her backyard.
Find out more on area at: https://brainly.com/question/25292087
HELP I WILL MARK BRAiNLIEST
Answer:
B) a + 2(a - 3) = 15
Step-by-step explanation:
To see which equation has a = 7, we have to plug 7 into a each time until we find a satisfied equation.
A:
[tex]4(7)-4(14-7)=24[/tex] [tex]28-4(7)=24[/tex] [tex]28-28=24[/tex] [tex]0\neq 24[/tex]B:
[tex]7+2(7-3)=15[/tex] [tex]7+2(4)=15[/tex] [tex]7+8=15[/tex] [tex]15=15[/tex]Therefore, B is the correct answer.
Please help me solve this
Pls help full equation please 18 through 20 please all answers plsss
A car travels 182 miles in hours 3 and 30 minutes. How many miles does it travel per hour?
Answer:
52
Step-by-step explanation:
A=5 what is the value of 3a^2
Answer:
225
Step-by-step explanation:
A = 5. 3A = 3(5) cubed. So 3 times 5 is 15. 15 cubed is 225.
Keiko tosses one penny and Ephraim tosses two pennies. What is the probability that Ephraim gets the same number of heads that Keiko gets?
Answer:
1/4 chance for Ephraim and 1/2 chance for Keiko
Which set makes the inequality m < -4 true
Answer:
To solve your inequality using the Inequality Calculator, type in your inequality like x+7>9. The inequality solver will then show you the steps to help you learn how to solve it on your own.
Step-by-step explanation:
Which of the two functions below has the smallest minimum y-value?
f(x) = (x - 13)4-2
g(x) = 3x3 + 2
Answer:
F has the smalled minimum value
Step-by-step explanation:
Help me! Please.✅✅✅✅✅✅
Answer:
Yamateh kudasai
Step-by-step explanation:
hope it helps
Which of the following describes a correct method for solving the equation below?
−7/2n + 5 = −16
due tonight help me out please
The average rate of change is the slope.
The slope is equal [tex]\frac{y2-y1}{x2-x1}[/tex], if we were to do that for each set of points, we get the slope is always 8.
Thus the average rate of change is 8.
Maria is 5 years older than her younger sister. If Maria will be n years after 7 years, find their total age in terms of n.
Answer:
n+(n-5)
=2n-5
n years Mary's age
n-5 years younger sisters age
Thanks!
Answer/Step-by-step explanation:
Given:
Maria is 5 years older than her younger sister.
If Maria will be n years after 7 years,
To Find:
Find their total age in terms of n.
Solve:
n+(n-5)
n + n = 2n
2n -5
n - years Mary's age
Therefore, n-5 years younger sisters age
[RevyBreeze]
please help me answer this asap thank you
Two parallel chords of a circle, MN and PQ have lengths 12 cm and 16 cm. If the diameter of the circle is
20 cm, find the perpendicular distance between the chords.
Answer:
Distance between parallel chords is 14 cm or 2 cm. Hope this helps
Step-by-step explanation:
What is the slope of the line that passes through the points (1,-6) and (-2,-8)?
Answer:
the slope is m= 2/3
if you need it for y is y=2/3x-20/3