Answer:
x=1
Step-by-step explanation:
-4-2(3-x)=-2(x+3)
Expand parentheses:
-4-6+2x=-2x-6
Add 2x+6 to both sides:
4x-4=0
Add 4 to both sides:
4x=4
Divide both sides by 4:
x=1
Hope this helps!
Answer:
x=7
Step-by-step explanation:
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Answer:
The first term of the geometric series is 1
Step-by-step explanation:
In this question, we are tasked with calculating the first term of a geometric series, given the common ratio, and the sum of the first 8 terms.
Mathematically, the sum of terms in a geometric series can be calculated as;
S = a(r^n-1)/( r-1)
where a is the first term that we are looking for
r is the common ratio which is 3 according to the question
n is the number of terms which is 8
S is the sum of the number of terms which is 3280 according to the question
Plugging these values, we have
3280 = a(3^8 -1)/(3-1)
3280 = a( 6561-1)/2
3280 = a(6560)/2
3280 = 3280a
a = 3280/3280
a = 1
Answer:
Step-by-step explanation:
Move -7 to the left, so make 7 positive and & move it next to 25
1. 3x = -10x +25+7
combine 25 & 7
2. 3x=-10x+32
move 10 to the side & combine with 3x
3. 3x+10x=+32
4. 13x = 32
lastly divide 32 from 13
<h2>
x= 32/13 OR x= 2 6/13</h2><h2>
</h2>
Cannot guarantee. But I believe the answers are:
1) (3,2)
2) (3,-2)
3) (-3,2)
4) (-3,-2)
Edit: These are correct. When you substitute these into each equation,you get 72.
The negatives work because (-x)^2 = positive
Using online calculators is great