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Paul [167]
3 years ago
6

Y=2x+3 X+2y=2 Solve by substitution please.

Mathematics
1 answer:
Kay [80]3 years ago
8 0
First you need to substitute Y (which equals 2x + 3) into the second equation.
X + 2(2X + 3) = 2     
Solve the parenthesis by the distributive property: X + 4X + 6 = 2
Add the x's: 5X + 6 = 2
Subtract 6 from both sides: 5X = -4 
Divide 5 from both sides: X=-4/5
Then, plug x into the first equation. 
Y=2(-4/5) + 3
Y= -8/5 + 3
Y= 7/5 

Then you can check your equations like this: 7/5 = 2(-4/5) + 3
7/5 = -8/5 + 3
7/5=7/5
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If the growth rate r of a population is positive and remains constant, the number of people added to the population,

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8 0
1 year ago
sydney has a $75 mall gift card. she wants to buy a sundress and a movie ticket. the movie ticket with tax costs $11.50. the sal
fenix001 [56]
11.50 + 1.04x < = 75
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3 years ago
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4 0
3 years ago
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A basketball trophy is 1.5 feet tall and casts a 2 foot shadow.
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7 0
2 years ago
PLEASE HELP EXPLAIN THIS!?!
zalisa [80]
Using your approximate y-intercept on the line of best fit, your equation would be y=11/7x + 3. 

We find the slope by choosing two points that are on the line:

(9, 18) is easy to spot; and (2, 7) is fairly easy to spot as well.  The formula for slope is:
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