Using a system of equations, it is found that:
Each pen costs $0.6.Each folder costs $0.4.Each notebook costs $4.4.What is a system of equations?A system of equations is when two or more variables are related, and equations are built to find the values of each variable.
In this problem, the variables are:
Variable x: The cost of a pen.Variable y: The cost of a folder.Variable z: The cost of a notebookJohn bought 2 pens, 3 folders, and 4 notebooks for a total of $20, hence:
2x + 3y + 4z = 20.
Cindy bought 5 folders and 5 notebooks for a total of $25, hence:
5y + 5z = 25.
x + z = 5.
x = 5 - z.
Isaiah bought 3 pens, 1 folder, and 2 notebooks for a total of $11, hence:
3x + y + 2z = 11.
y = 11 - 3x - 2z
Replacing the second and the third equation on the first, we have that:
2x + 3y + 4z = 20.
2(5 - z) + 3(11 - 3x - 2z) + 4z = 20.
10 - 2z + 3[11 - 3(5 - z) - 2z] + 4z = 20.
2z + 3(11 - 15 + 3z - 2z) = 10
2z + 3(z - 4) = 10
5z = 22.
z = 4.4
x = 5 - z = 5 - 4.4 = 0.6
y = 11 - 3x - 2z = 11 - 3(0.6) - 2(4.4) = 0.4.
Hence:
Each pen costs $0.6.Each folder costs $0.4.Each notebook costs $4.4.More can be learned about a system of equations at https://brainly.com/question/24342899
What is the following quotient?
Answer:
B
Step-by-step explanation:
The second option is the answer
Hope this helps :)
Factor b12 + 8.
help fast pls
Answer:
3b+2 or 4(3b+2)
Step-by-step explanation:
Mark as brainliest
Please help! this assignment locks at 12 and i will give brainlest!
Answer:
where is the assignment?
Please I give lots of points
Answer: y = 12.5x
Step-by-step explanation:
Because 250 bottles are filled every 20 minutes:
250/20=12.5
So, x=1, y=12.5
Hence, x=2 y=25
Because the number of bottles is directly proportional to the operation of the machine so:
12.5=a+b, 25.2a+b
a=12.5, b=0
Therefore, the equation is y = 12.5x
The Desmos graph of y = 12.5x is attached below
In parallelogram MNPQ, m∠M=6x+10°m∠M=6x+10° and m∠N=5x+10.5°m∠N=5x+10.5°. How many degrees is ∠M?
Answer: 97
Step-by-step explanation:
Guys, I’m giving you at least 100 points for you to answer to my angles, triangles, and quadrilaterals word problem homework package. So guys, please listen up and pay attention to me without ignoring my angles, triangles, and quadrilaterals word problem homework package for no reason! :D
Please help me to find the missing angle measures given 3 variables of an each scalene triangle.
Please answer to my geometric word problem questions as soon as possible with the best efforts and the best step-by-step explanations in order to get the Brainliest award of all the time! :D
Well anyways, guys, good luck on finding the missing angle measures given 3 variables of an each scalene triangle of my angles, triangles, and quadrilaterals word problem homework package in order to get the best Brainliest award of all of the time, and I will check the answers to see if it’s appropriate for me. :)
Answer:
Theories used
Angles on a straight line will always add up to 180°
The sum of interior angles in a triangle is 180°
Question 7
a + 134° = 180°
⇒ a = 180° - 134°
⇒ a = 46°
b + 119° = 180°
⇒ b = 180° - 119°
⇒ b = 61°
a + b + c = 180°
⇒ 46° + 61° + c = 180°
⇒ c = 180° - 46° - 61°
⇒ c = 73°
Question 8
r + 126° = 180°
⇒ r = 180° - 126°
⇒ r = 54°
s + 145° = 180°
⇒ s = 180° - 145°
⇒ s = 35°
r + s + t = 180°
⇒ 54° + 35° + t = 180°
⇒ t = 180° - 54° - 35°
⇒ t = 91°
#7
a=180-134=46°b=180-119=61°c=
180-(46+61)180-10773°#8
r=180-126=54°s=180-145=35°t=180-(54+35)=180-89=91°17
What percent does 20
8%
850%
85%
Answer:
=0
Step-by-step explanation:becase I got it right on a test
Please help me with this math problem!! Will give brainliest!! Please explain how you got your answer! :)
algebric expression 2f + 14 3 + 7f - 10 5.
•••••••••••••••••••••••••••••••••••••••••••••••••••
2f + 14 3 + 7f - 10 5.
Simplify:
[tex] = (9f + 38)[/tex]
•••••••••••••••••••••••••••••••••••••••••••••••••••
#Carry on Learning
please help me! I will make whoever answers brainiest! please help it's for a test!
Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.
Match each equation to the value of a that makes the equation true.
1
0
3
4
2
6(2a − a + 1) = 24
4 + 3(a + 2) = 16
3a − 2a − 4 = 0
2a + 3(a + 1) = 8
Answer:
6(2a-a+1)=24 =(3)
4+3(a+2)=16 =(2)
3a-2a-4=0 =(4)
2a+3(a+1)=8 =(1)
Step-by-step explanation:
6(2a-a+1) =24
6(2a-a+1) =2412a-6a+6 =24
6(2a-a+1) =2412a-6a+6 =246a =24-6
6(2a-a+1) =2412a-6a+6 =246a =24-66a= 18
6a/6= 18/6
a = 3
4+3(a+2)=16
4+3a+6=16
3a+10=16
3a=16-10
3a=6
3a/3=6/3
a=2
3a-2a-4=0
a-4=0
a=0+4
a=4
2a+3(a+1)=8
2a+3a+3=8
5a+3=8
5a=8-3
5a=5
5a/5=5/5
a=1
Write an equation that represents the line use exact numbers
Answer:
hello
f (2 ) = 6 et f ( 0 ) = 3
( 3 - 6 ) / ( 0 - 2 ) = - 3/- 2 = 3/2
ax = 3 x /2
f (0) = 3 ⇔ b = 3
f (x) = 3 x /2 + 3
also f ( 0) = 0 + 3 = 3
sorry
y = ax + b
b = 3
since the line cuts the y-axis in 3
then for a ? which is the slope..
we take 2 points on the line (0 ; 3) and (2 ; 6)
we move 2 units to the left to go up 3 units
so a = 3/2
=> y = 3/2x + 3
or
f(x) = 3/2x + 3
A football is punted from a height of 2.5 feet above the ground with an initial vertical velocity of 45 feet per second.
Write an equation to model the height h, in feet, of the ball t seconds after it has been punted.
The football is caught at 5.5 feet above the ground. How long was the football in the air?
Answer:
1.451 seconds. Hurry.
Step-by-step explanation:
The position(height, h) of the foot ball will be given by the equation:
h = -32.2t^2 + 45t + 2.5
The term -32.2t^2 consists of the acceleration caused by gravity at Earth's surface ( -32 ft/sec^2) and the term +45t accounts for the initial velocity. The + is assigned since the ball is moving vertically from ground. The negative sign in -32t^2 is due to the acceleration being towards ground. The term 2.5 accounts for the fact that the initial height of the ball is 2.5 feet above ground.
We can either calculate or graph with this function to find the time the ball spends in the air:
Calculate:
h = -32.2t^2 + 45t + 2.5
We need a value of t that would cause h to be 5.5 feet, the level it was caught:
5.5 = -32.2t^2 + 45t + 2.5
-32.2t^2 + 45t + 2.5 = 5.5
-32.2t^2 + 45t -3.0 = 0
Solve for t using the quadratic formula. I get a value of 1.33 seconds.
Graph:
See the attached graph. It confirms the 1.33 second value
What is the value of x?
Step-by-step explanation:
By the secant tangent theorem,
21(21+25)=x^2
x^2 = 966
x = sqrt(996)
In which direction must the graph of f(x) = |x| be shifted to produce the graph of g(x) = |x - 4|?
Answer:
right... C.
Step-by-step explanation:
what is the period of f(x)
Step-by-step explanation:
The period of f(x) is π.
To calculate the period using the formula derived from the basic sine and cosine equations. The period for function y = A sin (B a – c) and y = A cos ( B a – c ) is equal to 2πB radians. The reciprocal of the period of a function is equal to its frequency.
Math need help asap ty po sa makaka sagot
please see analysis
Step-by-step explanation:[tex]\left\{\right.{ \triangle}\ RST\cong { \triangle}\ DE[/tex]F
[tex](SSS\ Congruence\ Postulate)[/tex]
[tex]2.\ { \triangle\ CAT\cong { \triangle\ BED\ \left\{\right.Given\left.\ \right\}[/tex]
[tex]\bar{AT}\cong\bar{ED}[/tex]
[tex]\overline{AT}=20[/tex]
[tex]so\ \overline{ED}=20[/tex]
[tex]DE=3x-7=20\rightarrow\ x=9[/tex]
I hope this helps you:)
How much is 75% of 10 liter of milk?
Answer:
7.5 liters of milk
Step-by-step explanation:
Multiply 10 by 0.75
Hope that helps!
Donetta is investing $6000 in a stock fund that is offering a constant annual interest of 5%.
The interest in investing $6000 in a stock fund that is offering a constant annual interest of 5% is $300
What is interest?
Interest is the amount of money made from investing a particular amount of money over a period of time. It is given by:
I = PRT
I is interest, P is principal, R is rate and T is period
Donetta is investing $6000 in a stock fund that is offering a constant annual interest of 5%. Hence in one year:
I = 6000 * 5% * 1 year = 6000 * 0.05 * 1 = $300
The interest in investing $6000 in a stock fund that is offering a constant annual interest of 5% is $300
Find out more on interest at: https://brainly.com/question/25545513
Calculate the difference between the average rates of change of Function B and Function A from x=2 to x=4.
Answer:
-4
Step-by-step explanation:
-8/2=-4
So you do -8-2/4-2, which is the average rate formula.
Pllllssss answer!! i only have a few more minutess!! (i'll give brainilest) tyler wants to buy some cherries at the farmer's market. he has $ 10 and cherries cost $4 per pound. 1. if c is the number of pounds of cherries that tyler can buy, write one or more inequalities or equations describing c. 2. can 2 be a value of c? can 3 be a value of c? what about -1? explain your reasoning. 3. if m is the amount of money, in dollars. tyler can spend, write one or more inequalities or equations describing m. 4. can 8 be a value of m? can 2 be a value of m? what about 10.5? explain your reasoning. did you answer all 4 parts?
answer:
step by step explanation:
10-4 = c
6 = c
he can buy 2 pounds of cherries
2. 2 can be the value of c
c = 2
10- 4c
10- 4(2)
10 - 8 = 2
c = 3
10 - 4c
10- 4(3)
10 - 12 = -2
c = -1
10 - 4(-1)
10 - (-4)
10 + 4
= 14
manage this
mark me brainliest
Saleem wants to create a table of ratios that are equivalent to 2
3
. He includes the ratios 4
5
and 5
6
.
Are these ratios equivalent to 2
3
? Explain your reasoning.
Answer:
yes 6 is the equivalent of 3
Answer: 6 is the equivalent of 3
Step-by-step explanation: if wrong comment n I will fix
Is 206 – 3x) + x equivalent to 2(3x) + x + 12?
Answer:
Step-by-step explanation:(206-3x)+x
2(3x)+x+12
ok as i think one no is statsfy this equation .
The circumference of the hub cap of a tire is 77.62 centimeters. Find the area of this hub cap. Use
3.14 for it.
PLEASE HELP ME
[tex]\textit{circumference of a circle}\\\\ C=2\pi r~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ C=77.62 \end{cases}\implies 77.62=2\pi r\implies \cfrac{77.62}{2\pi }=r \\\\[-0.35em] ~\dotfill\\\\ \textit{area of a circle}\\\\ A=\pi r^2\qquad \qquad A=\pi \left( \cfrac{77.62}{2\pi } \right)^2\implies A=\cfrac{77.62^2}{4\pi }\implies A\approx 479.69[/tex]
x=3y+1
2x+4y=12
Solve each system by substitution
The required values are :
[tex]\qquad \sf \dashrightarrow \:x = 4[/tex]
and
[tex]\qquad \sf \dashrightarrow \:y = 1[/tex]
Check the attachment for solution ~
➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖
PLEASE PLEASE HELP !! The translation below is used on all three triangles.
(x, y) → (x, y + 1)
What happens to the triangles? Which answer would it be A, B, C, or D?
(I WILL MARK AS BRAINLIEST! PLEASE HELP!)
(A) They all move 1 unit to the right.
(B)They all move 1 unit to the left.
(C)They all move 1 unit down.
(D)They all move 1 unit up.
Answer:
D
Step-by-step explanation:
They all move 1 unit up.
The mapping notation essentially tells you, what you do to each point to get the image point.
In this case (x,y)→(x,y+1) is telling you, for any given coordinate on the original, you add 1 to its y coordinate. Adding 1 to a y coordinate moves it up one unit.
A small business had profits of $200, $300, $400, $500 and $500 over the 5 months. How much profit should the business make in the 6th month to have an average profit of $550 over the 6 months?
Answer:
$1400
Step-by-step explanation:
x= profit of 6th month
(200+300+400+500+500+x)
-------------------------------------- = 550
6
(1900+x)=3300
x=3300-1900
x=1400
A pencil is `120` millimeters long.
A marker is `9\%` longer than the pencil.
How long is the marker?
Given the length of the pencil, the length of the marker is 130.8 millimeters.
What are percentages?Percentage can be described as a fraction of an amount expressed as a number out of hundred. Percentages are represented %.
How long is the marker?Length of the marker = (1 + percentage) x length of the pencil
(1.09) x 120 = 130.8 millimeters
To learn more about percentages, please check: https://brainly.com/question/25764815
a=1/2(2x6)x4 i need helppp !!
Answer:
A=24
Step-by-step explanation:
First, we do the equations in the brackets(2x6) which is 12.
Before that, there is a 1/2 which means dividing whatever is inside the brackets by 2 which then becomes 6.
Then we x4 so the answer is 24.
a = 24
Step-by-step explanation:
[tex]\rm \: a = \frac{1}{2} (2 \times 6) \times 4 \\ \\ \rm a= \frac{1}{2} (12) \times 4 \\ \\ \rm a= \frac{12}{2} \times 4 \\ \\ \rm \: a = 6 \times 4 \\ \rm \: a = 24[/tex]
(2x) (x-1)(x-4)=40 pls simplify
Answer:
x = 5
Step-by-step explanation:
PLEASE HELP 100 POINTS!!!
Identify the vertex of the function graphed below. A. (1,1) B. (2,2) C. (3,1) D. (0,-2)
Answer:
See below.
Step-by-step explanation:
The vertex is the point where it stops the arch. In this case, the answer would be (2,2).
-hope it helps
Answer:
B: (2, 2)
Step-by-step explanation:
it's the point where the parabola changes directions