Answer:
sum of twice a number and three is 21
2x + 3 = 21
x = 9
Answer:
3y-4x=9
Step-by-step explanation:
using y-y1/ x- x1=m
y-1/x--3=4/3
y-1/x+3= 4/3
3(y+1)=4(x+3)
3y+3= 4x+12
3y-4x=12-3
3y-4x=9
It would be A. <span>y = −2x − 4.
Hope this helps!!
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<span>stock in a technology company.
individual stock in a tech company can yield the most return but because of market volatility with tech companies, it has the greatest amount of risk when compared to the safer but less lucrative options of </span>Treasury bonds, <span>CDs, or index funds.
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Answer:

Step-by-step explanation:
-5x - 10y = 15
<u>-3x + 10y = 25 </u>+
-8x = 40

x = -5
.
Substitute the value of x to one of equations
-5(-5) - 10y = 15
25 - 10y = 15
-10y = 15 - 25
-10y = -10

y = 1