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stepladder [879]
3 years ago
13

X=y-1 X+2y=8 Solve each system by substituation

Mathematics
2 answers:
DochEvi [55]3 years ago
4 0
Since the first equation is already set up as x= use it to plug into the second equation.
x + 2y = 8
(y -1) + 2y = 8
y -1 + 2y = 8
3y -1 = 8
Add 1 to both sides
3y = 9
Divide both sides by 3
y = 3
Use x = y - 1 to solve for x
x = 3 - 1
x = 2
(2,3)
Bezzdna [24]3 years ago
3 0
The answer is
y=3
x=2

Also, substitution is just a type of method to solve for x and y.
Tell me if you want the steps for solving it
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Describe a sequence of transformations that shows that Polygon A is congruent to Polygon B.
WINSTONCH [101]

Answer:

dgw9egvionhucor

Step-by-step explanation:

5 0
3 years ago
Need help?? Plsss. Make sure to explain why is it that answer
Archy [21]

Remember, volume is length x width x height. (lxwxh)

5+3 inches is the apparent width. (8)

7+7 inches is the height. (14)

The length is seemingly difficult to solve, but it's easy when you get the hang of it.

You need to divide the toolbox into shapes you can find the volume for and then add it all together.

Let's take 14x5x(7+7). 980.

Now the other half. 16x3x(7+7). 672.

Add.

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7 0
3 years ago
Amy used a total of 7 1/4 gallons of gas while driving her car. Each hour she was driving, she used 5/6 gallons of gas. What was
nika2105 [10]

Answer:  8  7/10  hours

whole part = 8

fractional part = 7/10

========================================================

Work Shown:

x = number of hours driving

(5/6)x = total number of gallons of gas used

(5/6)x = 7 & 1/4

(5/6)x = 7 + 1/4

(5/6)x = 28/4 + 1/4

(5/6)x = 29/4

x = (29/4)*(6/5)

x = (29*6)/(4*5)

x = 174/20

x = 87/10

x = (80+7)/10

x = 80/10 + 7/10

x = 8 + 7/10

x = 8 & 7/10

This is the same as writing 8  7/10

Amy drove 8 full hours, plus an additional 7/10 of an hour.

That mixed number converts to the decimal value 8.7

7 0
1 year ago
What's the pattern?<br> 1,2,4,8,16.....
Inessa05 [86]
You have to add the last number to itself. So the next number would be 32 because 16 + 16 equals 32. Then you add 32 + 32 so the next number would be 64
1, 2, 4, 8, 16, 32, 64, 128
7 0
3 years ago
Help please!!
klemol [59]
Looks like choice B would be the best description of an output.. Usually, output refers to the dependent value of a function rule.  It is also correct that the y coordinate of ordered pairs, graphed points, and in a function table.
7 0
4 years ago
Read 2 more answers
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