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natali 33 [55]
3 years ago
8

Y=2x+1 x+y=7 pls help meeeeeeeee

Mathematics
2 answers:
Gala2k [10]3 years ago
5 0

Answer:

y=2,\:x=\frac{5}{2}

Step-by-step explanation:

\begin{bmatrix}x+1\cdot \:x+y=7\\ y=2\end{bmatrix}

x+1· x+2=7

Simplify x+1· x+2:    2x+2x+1· x+2

Add similar elements: x+1· x=2x=2x+2

2x+2=7[ 2x+2=7 ]

Isolate x for 2x+2=7:    x=52 2x+2=7

Subtract 2 from both sides

2x+2−2=7−2

Simplify

2x=5

Divide both sides by 2

2x2 =52 Simplify

vlabodo [156]3 years ago
4 0

Answer:

y = 2x + 1 \\ substitute \: for \: y \: in \: x + y = 7 \\ x + (2x + 1) = 7 \\ 3x =   - 6 \\ x =  -  \frac{1}{2}  \\ y = 2( -  \frac{1}{2} ) + 1 \\ y =  - 1 + 1 \\ y = 0

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3 years ago
Consider the equation 1.5x + 4.5y = 18.<br> Where does the graph intersect the x-axis?
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3 years ago
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2 years ago
A cylinder has a base diameter of 10cm and a height of 7cm. What is its volume in cubic cm, to the nearest tenths place?
Keith_Richards [23]

Answer:

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8 0
3 years ago
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To the nearest 10,000 the population of Vermont was estimated to be about 620,000 in 2008 what might have been the exact populat
makvit [3.9K]

Answer:

619,500 to 620,499

Step-by-step explanation:

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This figure is rounded to nearest 10,000. The actual figure could have been either rounded up or rounded down to get this estimated figure.

Remember that, a number is rounded up when the digit to its right is 5 or greater than 5. Likewise, a number if rounded down if the digit to its right is lesser than 5.

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Population from 620,001 to 620,499 will be rounded down to 620,000 when we are rounding to nearest 10,000

From this we can conclude that the actual population of Vermont can be anywhere between the extreme limits mentioned above i.e. anywhere between 619,500 to 620,499

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4 years ago
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