Amy raised £n for charity. Chris raised £18 more than Amy.The mean amount raised by the two of them is £45. Work out how much money each one of them raised..
It's one of my Maths homework questions , please help me , thank you!
Answers
The amount of money raised by Amy is £36 and by Chris is £54.
What is an expression?
The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.
Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.
Given that Amy raised £n for charity. Chris raised £18 more than Amy. The mean amount raised by the two of them is £45.
Amy = £n
Chris = £n + 18
Mean = ( £n + £n +18 ) / 2
45 x 2 = 2£n + 18
n = £36
Chris = £n + 18
Chris = 36 + 18
Chris = £54
Therefore, Amy and Chris each raised £36 and $54 respectively.
To know more about an expression follow
#SPJ2
Mean:
So,
Therefore,
Hope I helped :)
(Sorry I was late for you other question)
Related Questions
Fill in the number to make this true : 3/4 = /100
PLEASE HELP ME for 13 points!:)1. 24x15. Estimate then find the product 2. 37x63. Estimate then find the product 3. 384x45. Estimate then find the product PLEASE HELP ME for 13 points!:) and thank you
Nick has $7.00. Bagels cost $0.75 each and a small container of cream cheese costs $1.29. Write an inequality to find the numbers of bagels nock can buy. Identify what your variable represents.
Use the zero product property to find the solutions to the x² + 12= 7x
Answers
seats per row=x+7
and total seats = rows times seats per row or x(x+7) or x^2+7x=seats =638
so if you subtract 638 from both sides you can get an equation thatyou can factor out (x^2+7x-638)=0
638 factors out to 2 times 11 times 29 so
(x-22)(x+29)=0
so x-22=0
x=22
or x+29=0
x=-29 but you can't have a negative number of rows so this answer is wrong
so the answer is there are 22 rows and 29 seats (22+7=29)
x = number of sets in a row
x - 7 = number of rows
x(x - 7) = 638
x^2 - 7x = 638
make a quadratic equation
x^2 - 7x - 638 = 0
then solve either using quadratic equation or find two numbers that add to make -7 and multiply to make -638, one number is negative and one is positive, as the product of the numbers is negative.
-29 + 22 = -7
-29 x 22 = -639
then put into brackets
(x - 29)(x + 22) = 0
when the equation equals zero you can find two values for x
x = 29 or -22
2
114
12
Answers
The process: 6 packages of pencils x 38 pencils each = 228 pencils total
228 / 19 students = 12 pencils per student!
Answers
Answer:
(k4+3+3k3)+(-5k3+6k3+8k5)
Final result :
8k5 + k4 + 4k3 + 3
Step by step solution :
Step 1 :
Equation at the end of step 1 :
(((k4)+3)+(3•(k3)))+(((0-(5•(k3)))+(6•(k3)))+23k5)
Step 2 :
Equation at the end of step 2 :
(((k4)+3)+(3•(k3)))+(((0-(5•(k3)))+(2•3k3))+23k5)
Step 3 :
Equation at the end of step 3 :
(((k4)+3)+(3•(k3)))+(((0-5k3)+(2•3k3))+23k5)
Step 4 :
Equation at the end of step 4 :
(((k4) + 3) + 3k3) + (8k5 + k3)
Step 5 :
Checking for a perfect cube :
5.1 8k5+k4+4k3+3 is not a perfect cube
Trying to factor by pulling out :
5.2 Factoring: 8k5+k4+4k3+3
Thoughtfully split the expression at hand into groups, each group having two terms :
Group 1: k4+3
Group 2: 8k5+4k3
Pull out from each group separately :
Group 1: (k4+3) • (1)
Group 2: (2k2+1) • (4k3)
Bad news !! Factoring by pulling out fails :
The groups have no common factor and can not be added up to form a multiplication.
Polynomial Roots Calculator :
5.3 Find roots (zeroes) of : F(k) = 8k5+k4+4k3+3
Polynomial Roots Calculator is a set of methods aimed at finding values of k for which F(k)=0
Rational Roots Test is one of the above mentioned tools. It would only find Rational Roots that is numbers k which can be expressed as the quotient of two integers
The Rational Root Theorem states that if a polynomial zeroes for a rational number P/Q then P is a factor of the Trailing Constant and Q is a factor of the Leading Coefficient
In this case, the Leading Coefficient is 8 and the Trailing Constant is 3.
The factor(s) are:
of the Leading Coefficient : 1,2 ,4 ,8
of the Trailing Constant : 1 ,3
Let us test ....
P Q P/Q F(P/Q) Divisor
-1 1 -1.00 -8.00
-1 2 -0.50 2.31
-1 4 -0.25 2.93
-1 8 -0.13 2.99
-3 1 -3.00 -1968.00
-3 2 -1.50 -66.19
-3 4 -0.75 -0.27
-3 8 -0.38 2.75
1 1 1.00 16.00
1 2 0.50 3.81
1 4 0.25 3.07
1 8 0.13 3.01
3 1 3.00 2136.00
3 2 1.50 82.31
3 4 0.75 6.90
3 8 0.38 3.29
Polynomial Roots Calculator found no rational roots
Final result :
8k5 + k4 + 4k3 + 3
Step-by-step explanation:
Answers
35-15=20
20+12=32
32-35=3
3+10=13
Answers
Answer:
Domain: (-4, ∞)
Range: (-∞,∞)
Step-by-step explanation:
Domain is all of your possible x values and range is all of the possible y values. I may have wrote the brackets wrong but the values are wright.
Answers
4x+9x+5y-3y
13x+2y
This is your answer.
Hope that help.