An expression you could use:
x + 3
Answer:
(-6,2)
Step-by-step explanation:
An ordered pair is a solution if when substituted it makes the equation true. If when you substitute, it does not make the equation true then it is not a solution.
-3x - 7y = 4
Substitute:
-3(-5) - 7(2) = 4
15 - 14 = 4
1 = 4 FALSE
-3(2) - 7(-5) = 4
-6 + 35 = 4
29 = 4 FALSE
-3(2) - 7(-6) = 4
-6 + 42 = 4
36 = 4 FALSE
-3(-6) - 7(2) = 4
18 - 14 = 4
4 = 4 TRUE
Answer:
a68 = -85.2
Step-by-step explanation:
The formula for an arithmetic sequence is
an = a1+d(n-1)
a1 =8.6 (it is the first term)
We can find the common difference by taking the second term and subtracting the first term
7.2-8.6 =-1.4
d=-1.4
n = the term number we are looking for
an = 8.6 -1.4(n-1)
We are looking for the 68th term so n=68
a68 = 8.6 -1.4(68-1)
= 8.6 -.1.4(67)
= 8.6-93.8
=-85.2
Let
x----------> Dewi quantity of money
y----------> Sheila quantity of money
we know that
(x-23)=(3/5)*y-------> equation 1
(y-42)=(4/5)*x-------> equation 2
using a graph tool----------> to calculate the system of equations
see the attached figure
the solution is the point (92.692,116.154)
x=92.692
y=116.154
Dewi quantity of money is $92.69
Sheila quantity of money is $116.15
the answer is
Dewi have $92.69