alex and ben go to a cafe with some friends.
alex buys 4 cups of coffee and 3 cups of tea. he paid a total of £6.95.
Ben buys 5 cups of coffee and 2 cups of tea. He pays a total of £7.20.
work out the total cost of each cup of coffee in the cost of each cup of tea
Answer:
Step-by-step explanation:
Assume the cost for a cup of coffee is x and the cost for a cup of tea is y.
For Alex: 4x+3y=6.95
For Ben 5x+2y=7.20
Then multiply Alex's cost by 2 and Ben's by 3 to cancel y.
8x+6y=13.90
15x+6y=21.60
Equation 2 minus equation 1 would be
15x+6y-(8x+6y)=15x+6y-8x-6y=7x
21.60-13.90=7.70
7x=7.70
Then x=1.10 and plugging it one of the equations,
y= 0.85
A cup of coffee costs 1.10 pounds and A cup of tea is 0.85 pounds
:)
Please I need help please
Find the measure of each missing angle. a || b
Answer:
though the answers are scattered but I worked them all , just patiently study it.
Solve it find the slope!
alexander has 418 songs on his MP3 player. he divides the songs into 11 equal groups. About how many songs are in each group. (round the numbers)
Answer:
38 songs in each group.
Step-by-step explanation:
Alexander has 418 songs on his MP3 player. he divides the songs into 11 equal groups. About how many songs are in each group. (round the numbers)
418/11 = 38 songs in each group.
Rewrite the value of each expression without using absolute value notation
|2b| where b<0
The rewritten form of the given expression such that it is without absolute value notation is; 2b.
What is the rewritten form of the given expression?It follows from the task content that the rewritten form of the given expression; | 2b | is to be determined.
On this note, since it is given that the variable b is less than zero; i.e b < 0.
It follows that the expression evaluation of 2b yields a negative number.
However, the rewritten form of the expression without the absolute value notation since the value of b is unknown still remains; 2b.
Therefore, the required rewritten form is; 2b.
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Each time that Daniel runs an obstacle course, he can run it 2 seconds faster than the last time.
He ran the course in 57 seconds the first time. How fast will he run the course the seventh time?
OA. 43 seconds
B. 45 seconds
O C. 47 seconds
OD. 55 seconds
Show that a quadrilateral with vertices (0,0), (5,0), (8,4) and (3,4) is a rhombus using distance
formula.
The quadrilateral with vertices (0,0), (5,0), (8,4), and (3,4) is a rhombus.
What is a rhombus?
A quadrilateral with all equal sides is a rhombus. Rhombuses are a particular kind of parallelogram in which all of the sides are equal since the opposite sides of a parallelogram are equal.
What is a distance formula?
D = √(x₂ - x₁)² + (y₂ - y₁)²
Here, we have
Given vertices A(0,0), B(5,0), C(8,4), and D(3,4)
By applying the distance formula, we get
AB = √(5 - 0)² + (0 - 0)² = 5
BC = √(8 - 5)² + (4 - 0)² = 5
CD = √(3 - 8)² + (4 - 4)² = 5
Hence, it's all sides are equal so it is a rhombus.
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note: Enter your answer and show all the steps that you use to solve this problem in the space provided. What is the expression in factored form? 9x^2-4
Answer: (3x-2)(3x+2)
I knew the answer it was just hard to explain all of it. Sorry if this doesn't help
A salesman bought a computer from a manufacturer. The salesman then sold the computer for $15600 making a loss of 25%. What amount did the salesman pay the manufacturer for the computer?
The amount that the salesman pay the manufacturer for the computer is $20800.
How to calculate the value?From the information, the salesman sold the computer for $15600 making a loss of 25%.
The amount that the salesman pay the manufacturer for the computer will be illustrated thus:
Since a 25% loss was made, the cost price will be: = 100% + 25% = 75%
Therefore, the cost price will be:
= Sales price / 125%
= $15600 / 0.75
= $20800
The amount is $20800.
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How many angles are formed by the intersection of the diagonals
Answer:
[tex]4 \alpha ngles[/tex]
4 angles
hope it help!
have a nice night
Jack's mother gave him 50 chocolates to give to his friends at his birthday party. He gave 3 chocolates to each of his friends and still had 2 chocolates left.
Write an equation to determine the number of friends (x) at Jack's party.
Answer:
x = 48/3
when Jack got 50 chocolates and has left 2, then Jack gave away 50-2=48 chocolates. When each friend got 3 chocolates, the number of friends x is equal to 48 divided by 3.
A regular pentagon with sides of 7 cm. What is the area of this pentagon?
The area of the regular pentagon with sides of 7 cm is 84.30 cm²
How to calculate the area of a regular pentagon?
The area of a regular pentagon can be determined if the side length (s) is given. The formula used for calculating the area of a regular pentagon is:
[tex]A = \frac{1}{4}\sqrt{5(5+2\sqrt{5})}s^{2}[/tex]
Given: side length (s) = 7 cm
Area (A) = 1/4×√( 5(5+2√5) ×7² = 84.30 cm²
Therefore, the area of the pentagon is 84.30 cm²
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What is an equation of the line that passes through the point (-4,-7) and is parallel to the line 3x-y=4.
I need to know (basically what the picture shows)
Answer:
Step-by-step explanation:
Hi, you are studying trigonometry :P nice
conterminal means stopping at the same place, right? sooo what is the same place for 659° compared to our only once around the circle of 360° since 720° is twice around a circle our 659° is less than that so just subtract 360° from 659° to get the co-terminal angle.
659-360=299°
299° is the co-terminal angle
270 is the line between the 3rd and 4th quadrant, so this is definitely in the 4th quadrant.
let's just count backwards (CW) from zero degrees till we get to our 299° angle going in the forward (CCW) direction. so 299-360= -61°
the reference angle is 61°
Does all of this make sense? :/
A ramp is elevated to a height of 7 inches from the base. The horizontal distance between the lower end of the ramp and the base is 19 inches, as shown in the figure. What is the length of the ramp?
The length of the ramp is [tex]\sqrt{410}[/tex] inches.
According to the question,
We have the following information:
A ramp is elevated to a height of 7 inches from the base. The horizontal distance between the lower end of the ramp and the base is 19 inches.
So, it will be a right-angled triangle.
Now, we can use Pythagoras theorem to find the length of the ramp which is the hypotenuse of the triangle.
Let's denote the length of the ramp to be l, elevated height to be p and horizontal distance to be b.
[tex]l^{2} =p^{2} +b^{2}[/tex]
[tex]l^{2} =7^{2} +19^{2}[/tex]
[tex]l^{2}[/tex] = 49+361
[tex]l^{2}[/tex] = 410
l = [tex]\sqrt{410}[/tex] inches
Hence, the length of the ramp is [tex]\sqrt{410}[/tex] inches.
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Richard’s cumulative gpa for 3 semesters was 2. 0 for 42 credits. His fourth semester gpa was 4. 0 for 14 course units. What is richard’s cumulative gpa for all 4 semesters?.
Richard earned a cumulative GPA of 2.5 in all four semesters.
Here, we know that the cumulative GPA for the first 3 semesters is 2.0
He had earned 42 credits in total in all three semesters.
Cumulative GPA = Total points earned/credits rewarded
Hence,
Total points earned in 3 semestes= 2 X 42
= 84 points
In the fourth semester,
he had earned 14 credits with a GPA of 4.0
Hence total points earned = 4 X 14
= 56 points
Therefore, total points earned in all four semesters = 84 + 56 points
140 points
Total credits = 14 + 42
= 56
Hence, the cumulative GPA of all 4 semesters
= 140/56
= 2.5 points.
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the goal of the least-squares regression is to compute a line that
Answer: you did not put in the full equation but i got this right out of the box.
ˉx 28
r 0.82
If you can help me that would be great
Answer:
x - 6 = -45y = -5Step-by-step explanation:
For the first one, find the value of x:
[tex]3x-8=-2\\3x=8-2=6\\x=2[/tex]
Then, use the value of x to find the answer:
[tex]x-6=2-6=-4[/tex]For the second one, find the value of y:
[tex]-2(3y+5)=-4\\-6y-10=-4\\-6y=10-4=6\\y=-1[/tex]
Then, use the value of y to find the answer:
[tex]5y=5(-1)=-5[/tex]
Determine the value of x and the indicated angle measure.
I understand the concept of solving for x usually and solving the missing angle but I could use some help with this one. I'm stuck!
Please and thanks! ^_^
The value of x for the given triangle is 4.5
What is a triangle?A triangle is a geometric figure with three edges, three angles and three vertices. It is a basic figure in geometry.
The sum of all three angles of a triangle is always 180°
In the given triangle ABC,
∠A=(9x+16)°, ∠B=(6x+15)°
And the extrior angle ∠C=(19x+3)°
Use the external angle property,
The sum of two interior angles is equal to an exterior angle.
Therefor,
∠C=∠A+∠B
(19x+3)°=(9x+16)°+(6x+5)°
19x+3=15x+21
4x=18
x=4.5
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Factor each sum or difference of cubes
a) 8-1/8a^3
b) 1/64m^3+1000
c) 125a^3-64b^3
d) 1/27x^3+1/125y^3
Write each polynomial as the square of a binomial as an expression opposite to the square of a binomial
e) 0.25x^2-0.6xy+0.36y^2
f) -a^2+0.6a-0.09
g) 9/16a^4+a^3+4/9a^2
The following are the answers:
a) 7 / (2a)³
b) 1/(4m)³ + 10³
c) (5a)³ - (4b)³
d) 1/(3x)³ + 1/(5y)³
e) (0.5x - 0.6y)²
f) (-a - 0.3)²
g) ((3/4)²a² + (2/3)²a)²
What is an expression?An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
a)
(8 - 1) / 8a^3
= 7 / (2a)³
b)
1/64m^3 + 1000
= 1/(4m)³ + 10³
c)
125a^3 - 64b^3
= (5a)³ - (4b)³
d)
1/27x^3 + 1/125y^3
= 1/(3x)³ + 1/(5y)³
Now,
Polynomial is an expression of writing with more than one term.
We will write it in the form of:
(a + b)² = a² + 2ab + b²
(a - b)² = a² - 2ab + b²
e)
0.25x^2 - 0.6xy + 0.36y^2
= (0.5x)² - 2 x 0.5 x 0.6 + (0.6y)²
= (0.5x - 0.6y)²
f)
-a^2 + 0.6a - 0.09
-a² - 2 x (-a) x 0.3 - (0.3)²
= (-a - 0.3)²
g)
9/16a^4 + a^3 + 4/9a^2
((3/4)²a²)² + 2 x (3/4)²a² x (2/3)²a + ((2/3)²a)²
= ((3/4)²a² + (2/3)²a)²
Thus,
The following are the answers:
a) 7 / (2a)³
b) 1/(4m)³ + 10³
c) (5a)³ - (4b)³
d) 1/(3x)³ + 1/(5y)³
e) (0.5x - 0.6y)²
f) (-a - 0.3)²
g) ((3/4)²a² + (2/3)²a)²
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write a coordinate rule for the composition.blue quadrilateral w x y z and green quadrilateral s t u v are graphed on a coordinate plane. quadrilateral w x y z has vertex w at ordered pair negative 1 comma negative 2, vertex x at ordered pair negative 2 comma 0, vertex y at ordered pair 1 comma 2, and vertex z at ordered pair 1 comma negative 1. quadrilateral s t u v has vertex s at ordered pair negative 2 comma negative 4, vertex t at ordered pair negative 2 comma 2, vertex u at ordered pair 2 comma 4 and vertex v at ordered pair 4 comma 0.$\left(x,\ y\right)\rightarrow$ ( , )skip to navigation
Coordinate rule for the composition is w(-1,-2) → s(-1-1,-2-4) → s(-2,-4) , x(-2,0) → t(-2+0,0+2) → t(-2,2), y(1,2) → u(1+1,2+2) → u(2,4) , z(1,-1) → v(1+3,-1+1) → v(4,0).
Given:
w x y x has vertices w(-1,-2) , x(-2,0), y(1,2) and z(1,-1).
s t u v has vertices s(-2,-4) , t(-2,2) , u(2,4) and v(4,0).
The coordinate rule for transformation is:
w(-1,-2) → s(-1-1,-2-4) → s(-2,-4)
x(-2,0) → t(-2+0,0+2) → t(-2,2)
y(1,2) → u(1+1,2+2) → u(2,4)
z(1,-1) → v(1+3,-1+1) → v(4,0)
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The admission fee to a museum is $12.50 per nonsenior adult, $8 per child, and $6.50 per senior citizen. A tour group consists of m nonsenior adults, (5/4m +6) children, and 8n senior citizens. What is the total admission fee of the group
The total admission fee of the group is 22.5m + 51n + 48.
How to calculate the total cost?Given that the admission fee to a museum is $12.50 per nonsenior adult, $8 per child, and $6.50 per senior citizen.
Also, it was further stated that the tour group consists of m nonsenior adults, (5/4m +6) children, and 8n senior citizens.
The total amount for the fees will be:
= Non senior adults + Children + Senior citizen
= 12.5(m) + 8(1.25m + 6) + 6.50(8n)
= 12.5m + 10m + 48 + 51n
= 22.5m + 48 + 51n
= 22.5m + 51n + 48
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A new bank customer with $3,000 wants to open a money market account. The bank is offering a simple interest rate of 1.4% What will the account balance be after 10 years
The account balance after 10 years is $7200.
How to calculate the interest?It should be noted that simple interest is calculated as:
= (Principal × Rate × Time) / 100
= ($3000 × 1.4 × 10) / 100
= $4200
The total amount that will be in the account will be:
= Principal + Interest
= $3000 + $4200
= $7200
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A linear function h models a relationship in which the dependent variable increases 1 unit for every 5 units the independent variable decreases. The value of the function at 0 is 3.
The given linear function is [tex]f (h) = - \frac{1}{5} x + 3[/tex]. The graph is attached at the end.
Let the independent variable be x.
It is given in the question:
Value of the function, h at 0 = 3
Thus, h(0) =3
Also, when the independent variable decreases by 5, the dependent variable increases by 1.
So, slope = -[tex]\frac{1}{5}[/tex]
y-intercept = 3
We know the linear equation is-
y = mx + b ... (i)
where y ⇒ linear function
m ⇒ slope of the line
x ⇒ independent variable
b ⇒ y-intercept
Putting the values of each term in equation (i), we get:
[tex]h (x) = - \frac{1}{5} x + 3[/tex]
We can plot this equation in a graph, as attached below.
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The complete question is:
Graph the function with the given description. A linear function h models a relationship in which the dependent variable increases 1 unit for every 5 units the independent variable decreases. The value of the function at 0 is 3.
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What’s the equation of the function?
Hi again! The equation to the function would be..
y = 1/2x + 1 (assuming that the initial value is one)
The table shows the amount of storage y (in gigabytes) on a music-playing device when there are x songs on the device
A) Write an equation that models the amount of storage as a function of the number of songs
B) Interpret the slope and t-intercept of the line of fit
pls include work
a) An equation that models the amount of storage as a function of the number of songs is y = -0.005x + 16
b) Slope of the equation is -0.005 and the intercept of the equation is 16
Slope intercept form
Slope intercept form presents the graph of a straight line and is represented in the form of
y = mx + c.
where
y = y coordinate
m = slope
x = x coordinate
b = y intercept
Given,
Here we have the table shows the amount of storage y (in gigabytes) on a music-playing device when there are x songs on the device
Now, we have to find the following:
a) Equation of the table
b) Slope and intercept.
In order to find the equation, we have to identify the slope an intercept of the table.
So, to find that we have to take two points from the table.
Then the selected points are
(0, 16), (242, 14.8)
By using these point we have to calculate the slope as,
m = (14.8 - 16) / (242 - 0)
m = -1.2/242
m = -0.005
Now, the intercept is calculated by using the point (0, 16) and the slope -0.005, then we get,
16 = -0.005(0) + c
c = 16
Therefore, the equation is y = -0.005x + 16.
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Write an equation in slope-intercept form of the line that passes through the given point and is parallel to the graph of the given equation. the ordered pair (2, - 2) y = -x - 2.
The equation of the parallel line is y = -x
How to determine the line equation?The equation is given as
y = -x - 2
The point is also given as
point = (2, -2)
The equation of a line can be represented as
y = mx + c
Where
slope = m
By comparing the equations, we have:
m = -1
This means that the slope of y = -x - 2 is -1
The slopes of parallel lines are equal
This means that the slope of the other line is -1
The equation of the parallel line is then calculated as
y = m(x - x₁) +y₁
Where
m = -1
(x₁, y₁) = (2, -2)
So, we have
y = -1(x - 2) - 2
Open the brackets and evaluate
y = -x
Hence, the parallel line has an equation of y = -x
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What is 19% of 40? ??
Answer: 7.6
Step-by-step explanation:
19÷100×40 which will give you 7.6
math homework similar shapes pls help
Answer: Both p and q are 8cm long.
Step-by-step explanation:
BE created a similar triangle that is exactly half of the larger triangle.
So if BE is 4 and AE is 8 then we know that CD is 8 and AD is 16.
However we only need segment q which is half of AD so the answer is:
p=8 and q=8
;)