Mathematics High School
Answers
Answer 1
Answer:
El kilo de frijol cuesta 7 pesos.
Step-by-step explanation:
Un sistema de ecuaciones lineales es un conjunto de ecuaciones lineales con las mismas incógnitas, que se relacionan mediante dichas ecuaciones.
Resolver un sistema de ecuaciones consiste en encontrar el valor de cada incógnita para que se cumplan todas las ecuaciones del sistema.
Para el planteo de este problema mediante un sistema de ecuaciones se debe plantear las siguientes variables:
x: precio de 1 kg de arrozy: precio de 1 kg de frijol
Al comprar 5 kg de arroz y 6 kg de frijol se pagaron 132 pesos. Entonces, esto se representa mediante:
5*x + 6*y= 132
Si se compran 6kg de arroz y 7kg de frijol, se pagan 157 pesos. Entonces, matemáticamente se expresa como:
6*x + 7*y= 157
Por lo que el sistema de ecuaciones a resolver es:
[tex]\left \{ {{5*x+6*y=132} \atop {6*x+7*y=157}} \right.[/tex]
Deseas conocer el precio del kilo de frijoles, es decir, que deseas conocer el valor de la variable y.
Resolviendo mediante el método de sustitución (que despejar una de las incógnitas en una de las ecuaciones y sustituir la expresión en la otra), despejamos el valor de la variable x de la primer ecuación:
[tex]x=\frac{132-6*y}{5}[/tex]
Reemplazando esta expresión en la segunda ecuación y resolviendo se obtiene:
[tex]6*\frac{132-6*y}{5}+7*y=157[/tex]
[tex]\frac{6}{5}*(132-6*y)+7*y=157[/tex]
[tex]\frac{6}{5}*132-\frac{6}{5}*6*y+7*y=157[/tex]
[tex]158.4-7.2*y+7*y=157[/tex]
-7.2*y + 7*y= 157 - 158.4
-0.2*y= -1.4
y= -1.4÷ (-0.2)
y= 7
El kilo de frijol cuesta 7 pesos.
Related Questions
Conner saved $400 to buy a new mountain bike. The bike costs $440. Last month, the bike was discounted 10%. Conner decided not to buy the bike at that time, but instead he spent $25 at the movies. The bike is no longer on sale. If Conner saves $20 per month, in how many months will he have enough money again to buy the bike?
Answers
Answer:
he will save $20 and save $20 okay?
Step-by-step explanation:
Answer:
4 months.
Step-by-step explanation:
First you need to subtract the amount Conner spent from the amount Conner had.
We know Conner had $400 and spent $25 at the movies, so 400 - 25 = he has $375
Next, you have to find how much money he has to earn before he can buy the bike again.
We know the bike costs $440 and Conner has $375 so 440 - 375 = $65 needed
Finally we need to determine how many months it will take to earn $65
We know Conner saves $20 a month, and he needs $65, so 65 / 20 = 3.25 But Conner saves $20 a month, so you need to round up to 4 months.
can someone please gimme some ideas of what to do, it has to be 2 pages and i have such a hard time writing stories about things i’m not very interested in. thanks so much!
Portfolio Directions and Rubric
Select an event that took place in the years that followed World War I (1919–1945)
and imagine it through the eyes of a person of the time period. Choose a persona that
is in some way significant to Georgia. For example, you could choose to portray a
black soldier returning home to Atlanta from WWII, Eugene Talmadge opposing the
New Deal, or President Franklin D. Roosevelt visiting the mineral springs in Warm
Springs, Georgia.
Answers
Answer:
Put all your elctronices far away from you focuse and engage in the story and focus i can t tell you enough
Step-by-step explanation:
Leo made a quilt for his cousin's doll. The quilt had a 6 × 6 array of different color square patches. If each patch is 2 1 4 in long, what is the area of the whole quilt?
Answers
Answer: [tex]\dfrac{729}{4}\ in.^2[/tex]
Step-by-step explanation:
Given
length of each patch is [tex]2\ \frac{1}{4}[/tex] in.
The size of the quilt is [tex]6\times 6[/tex] array i.e. there are [tex]6^2[/tex] patch available
The area of each patch is
[tex]\Rightarrow \dfrac{9}{4}\times \dfrac{9}{4}\\\\\Rightarrow \dfrac{81}{16}\ in.^2[/tex]
The area of the whole quilt is
[tex]\Rightarrow 36\times \dfrac{81}{16}\\\\\Rightarrow \dfrac{729}{4}\ in.^2[/tex]
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Answers
Answer: D
Step-by-step explanation:
Answer:
D. The last line plot
Step-by-step explanation:
It's easier to line up the heights in order.
[tex]4\frac{1}{2}, 4\frac{3}{4}, 5, 5\frac{1}{4}, 6\frac{1}{2}, 6\frac{3}{4}[/tex]
Then one-by-one, plot each of the heights to the line plot.
Trisha had a bowling score of 126 for the first game. She had a score of 97 for the second game.
Which is closest to the percent decrease in her score from the first game to the second game?
Answers
Answer:
23% decrease
Step-by-step explanation:
:)
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Answers
Answer:
whats the question?
Step-by-step explanation:
it shows nothing
Hello it doesn’t really show anything so
A construction company has two divisions: ceilings and floors. The amount of revenue for the ceiling division, C, is approximately Normally distributed with a mean of $2.6 million per year and a standard deviation of $0.9 million per year. The amount of revenue for the flooring division, F, is approximately Normally distributed with a mean of $3.1 million per year and a standard deviation of $1.1 million per year. Assume C and F are independent random variables.
What is the probability that the ceiling division makes more revenue than the flooring division in a randomly selected year?
0.006
0.363
0.401
0.637
Answers
Answer:
The correct anwer is 0.363
Step-by-step explanation:
Got a 100% on edge quiz
Which equation has the solution n = 11?
Answers
Answer:
3n + 12 = 45
Step-by-step explanation:
*Process of elimination*
___________________
3n + 12 = 45
(given)
_________
3n + 12 = 45
- 12 - 12
(subtraction property of equality)
__________________________
3n = 33
÷ 3 ÷ 3
(division property of equality)
_______________________
n = 11
_____
7n - 8 = 62
(given)
________
7n - 8 = 62
+ 8 + 8
(addition property of equality)
__________________________
7n = 70
÷ 7 ÷ 7
(division property of equality)
_______________________
n = 10 ≠ 11
________
8n + 6 = 102
(given)
________
8n + 6 = 102
- 6 - 6
(subtraction property of equality)
__________________________
8n = 96
÷8 ÷8
(division property of equality)
_______________________
n = 12 ≠ 11
________
5n - 20 = 25
(given)
________
5n - 20 = 25
+ 20 + 20
(addition property of equality)
__________________________
5n = 45
÷5 ÷5
(division property of equality)
_______________________
n = 9 ≠ 11
Answer:
it's 3n+12=45
Step-by-step explanation:
3n+12-12=45-12
3n=33
=11
Can someone pls help me
Answers
Answer:
Hmmm I think it would 108 I think I’m sorry if it wrong ;^;
Step-by-step explanation:
what is the solution to this equation?
y=-1x-5
4x-8y=4
write your answer in coordinate form.
Answers
Answer:
m= -1/2
this is the answer
WHAT WOULD THIS BE PLEASE ?!
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Answers
Answer:
314 cubic yards
Step-by-step explanation:
V(cyl) = πr²h
= 3.14(5²)(4)
= 3.14(25)(4)
= 3.14 x 100
= 314
How much interest does Ms. Paris earn on an $1800 loan for 6 months with a simple interest rate of 8.5%?
Answers
Answer:
$1136.60
Step-by-step explanation:
The formula for exponential growth is f(x) = a(1 + r)^x where a is the initial value, r is the growth rate, and x is the number of time intervals.
We know that Mr. Paris starts with an $1800 initial value, so we can substitute that into the equation:
f(x)=1800(1 + r)^x
We also know the time intervals is 6 months. So that can be substituted as well:
f(x)=1800(1 + r)^6
They told you that the growth rate is 8.5%, which is 0.085 of 1.
f(x)=1800(1 + 0.085)^6
Add the 2 values in the parentheses and you get 1.085
f(x)=1800(1.085)^6
Now solve.
Order of operations requires you to raise 1.085 to the 6th power before multiplying by 1800. So then you have this:
1800(1.63146751) = 2936.64152. That rounds to 2936.60
So $2936.60 is the total amount of money in the bank account, but were looking for the interest earned, which is the difference between the end value and the initial value.
$2936.60 - $1800 = $1136.60
Please help, due soon. show work for the problem
Answers
The answer would be c
Points A and B lie on a circle with radius 1, and arc AB ⌢ has a length of [tex]\frac{\pi }{3}[/tex]. What fraction of the circumference of the circle is the length of arc AB ⌢?
Answers
Answer:
Solution given:
arc AB :angle=[tex]\frac{\pi }{3}[/tex]=60
radius[r]=1
Now
we have
Circumference the circle is the length of arc AB ⌢:[tex]\frac{arc AB }{360}2\pi*r[/tex]
:
[tex] \frac{180}{3} \div 360 \times 2\pi \: \times 1[/tex]
=⅓π or 1.047units
Note:
For angle π=180
For length π=[tex]\frac{22 }{7}[/tex].
L
Ø/360×2πr
π/3=60°
L=60/360×2π(1)L=1/6×2πL=π/3L=1.047units
A worker in a silver mine descends 60 feet. Use an integer to represent the change in the worker's position.
Answers
Answer:
-60
Step-by-step explanation:
If the worker is descending, he is going down. The change in his position could be marked on a graph by translating the original point down by 60 units. Aka -60 units.
please help me.
Here are the final scores for professional soccer team for past 5 tournament
3, 4, 1, 5, 2
Find the mean absolute deviation of team's scores.
A. 1.2
B. 3
C. 0.6
D. 3.2
Answers
Answer:
B(3)
Step-by-step explanation:
reorder 1,2,3,4,5
middle number is 3
75% OFF!
Xavier wants to buy a silver coat rack. The sale price is $169. What was the original price?
Answers
$676.
If the sale price of the coat is $169, you are looking for the original price. I like to think about it in the sense that if an item is 75% off, you are paying 25% of the original amount. Using that logic, in order to determine the sale price you would use the equation
Original price * 25% = $169
To solve for the original price:
Original price = $169/.25 = $676.
What is the perimeter of the pentagon in feet? (NO LINKS)
Answers
Answer:
21.6
Step-by-step explanation:
3.8 x 3.8 x 4.4 x 4.4 x 5.2 + 21.6
Which expression is equivalent to 4(3n -5)?
Answers
Answer:
12n-20
Step-by-step explanation:
Use distribution
4×3n= 12n
4×(-5)= -20
12n-20
Answer:
12n - 20
Step-by-step explanation:
1. 4(3n-5)
2. 4(3n-5) = 12n - 20 multiply every number in ( ) by 4 (include variables)
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what would type of quadrilateral would A(2, 3) B(-1, 4) C(0, 2) D(-3, 3) create?
Answers
Answer:
Parallelogram
Step-by-step explanation:
Write a recursive rule for an= Зn — 6.
Answers
Answer:
Explicit formula: a(n)=3n-6
Recursive formula: a(n)=-3+(n-1)3 <--
Step-by-step explanation:
a(n)=3n-6 where a(1)=3(1)-6=-3 and d=3
Plug values into recursive formula:
a(n)=a1+(n-1)d
a(n)=-3+(n-1)3
in which quadrant is theta if the statement is true: Tan theta > 0 and sin theta >0
Answers
Quadrant 1 because sin and tan (as well as consine, but not mentioned) are greater than 0 in that quadrant
#2 Identify the number of TERMS and DEGREE of the polynomial. *
5x4 + 12
Answers
Answer:
Step-by-step explanation:
number of terms=2
degree=4
the question is in the picture attached. I started to draw it but I don't know what to do next. please help!!!!!
Answers
Answer:
Is there an error in the question? it has BC = 27 twice and we don't know much about the other sides. Anyway let's try
Step-by-step explanation:
You are told that to go from WXYZ to ABCD the scale factor is 2/3, which means that you multiply by 2/3. So to go the other way round, from ABCD to WXYZ which is what you want, you divide by 2/3, or multiply by 3/2.
So, to find XY you multiply the right side from ABCD by 3/2. I think BC is the right side?
So XY = 27 × 3/2
XY = 81 / 2 or 40.5 or 40 1/2
For adults, a bowling alley charges $3.75 for shoe rental and $5 per game. For children, the cost is $2.50 for shoe rental and $4 per game. What expression represents the total cost for one adult and one child to bowl g games?
Answers
Answer:
1x+1y= 9
x= adults y= children 9= the amount they have to pay to play a game if its 1 adult and 1 child
The expression represents the total cost for adults and children:-
Ca = $3.75 + 5g
Cc = $2.50 + 4g
What is an expression?
Expression in maths is defined as the collection of numbers variables and functions by using signs like addition, subtraction, multiplication, and division.
Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.
Given that for adults, a bowling alley charges $3.75 for shoe rental and $5 per game. For children, the cost is $2.50 for shoe rental and $4 per game.
For adults the expression will be:-
Ca = $3.75 + 5g
For children, the expression will be:-
Cc = $2.50 + 4g
Hence, the expression are Ca = $3.75 + 5g and Cc = $2.50 + 4g.
To know more about an expression follow
https://brainly.com/question/28487598
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The equation 3x-6y-2=0 in slope-intercept form is?
Answers
Answer:
Y= 1/2 x- 1/3
Step-by-step explanation:
See Image below:)
The answer is y= 1/2 X- 1/3
I need answers please help
Answers
Answer:
use a ti 84 calculator on stat
Step-by-step explanation:
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Answers
The answer is 2^9. Cancel out the bottom numbers. Then multiply.
What is the result of adding 3 to -3?
A) -6
B) -3
C) 0
D) 6
Answers
Answer:
C
Step-by-step explanation:
-3 + 3 = 0
- Gage Millar, Algebra 2 Tutor
Answer:
[tex]\huge{\boxed{\boxed{\tt {⇻ Answer :- }}}} \ [/tex]
[tex]3 + ( - 3) \\ = 3 + - 3 \\ = 3 - 3 \\ = 0[/tex]
⎆ Answer :- Option C) 0
During a test, 3 out of 200 television sets were found to be defective. About how many defective sets would you expect out of 4,000 television sets?
Answers
Answer:
60?
Step-by-step explanation:
4000/200 = 20
20 × 3 =60