A) 4(25-3y)+5y=9
100-7y=9
91=7y
y=13
(-14,13)
b) 14-x=x-10
2x=24
x=12
(12,14)
c) 4x=12
(3,7)
d) 18.5x+10.4y=200
x+y=130
Answer:5n+6
Step-by-step explanation :an=a1+d(n-1)
=1+(-5)(n-1) or 1+-5n+5
an=-5n+6
Answer:0.25
Step-by-step explanation:
Just type it in a calculator
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Answer:
<h2>A) 32</h2>
Step-by-step explanation:
From 1 to 10 we have 4 numbers which are {2,4,6,8}
From 10 to 20 we have 4 numbers which are {12,14,16,18}
.
.
.
From 70 to 78 we have 4 numbers which are {72,747,6,78}
<em><u>conclusion:</u></em> we 4×8 number = 32
