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ki77a [65]
3 years ago
15

Solve the system of equations by subtraction. What is the solution for x? 2x+y=1 4z+2y=-1

Mathematics
1 answer:
Stolb23 [73]3 years ago
8 0

\left\{\begin{array}{ccc}2x+y=1&|\text{subtract 2x from both sides}\\4x+2y=-1\end{array}\right\\\\\left\{\begin{array}{ccc}y=-2x+1&(*)\\4x+2y=-1&(**)\end{array}\right\\\\\text{substitute}\ (*)\ \text{to}\ (**):\\\\4x+2(-2x+1)=-1\qquad\text{use distributive property}\\\\4x+(2)(-2x)+(2)(1)=-1\\\\4x-4x+2=-1\\\\2=-1\qquad\text{FALSE}\\\\Answer:\ \boxed{NO\ SOLUTION}

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Hey everyone!!!!!!!!!!!
Ronch [10]

Answer:

P(0, 1)

Step-by-step explanation:

Using the section formula

x_{P} = \frac{(3(-2))+(2(3))}{2+3} = \frac{-6+6}{5} = 0

y_{P} = \frac{(3(5))+(2(-5))}{2+3} = \frac{15-10}{5} = 1

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8 0
3 years ago
0 ft elevation, diver is underwater at depth of 138 ft. In this area, the ocean floor has a depth of 247 ft. A rock formations r
KiRa [710]
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</span>247-138=109 ft
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Now, the </span>rock formations rises to a peak 171 to above the ocean floor, so to find <span>how many feet below the top of the rock formations is the diver, we are going to subtract the distance to the driver form the ocean floor from the rock formations height:
</span>171-109=62 ft
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3 0
3 years ago
Read 2 more answers
A price is increased by 44% and is now £288.<br> Work out the original price.
REY [17]

Answer:

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Step-by-step explanation:

4 0
3 years ago
Alexandra is two years older than brad. cecilia is three years younger than alexandra. all three ages added together gives a tot
MatroZZZ [7]

Let us say that:

x = age of brad

x + 2 = age of Alexandra

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We are also given that:

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<span>
solving for x:</span>

3x + 1 = 37

3x = 36

x = 12 = age of brad

x + 2 = 14 = age of Alexandra

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4 0
3 years ago
If 3 1/2 pounds of bananas cost $1.96, how much would one pound cost?
anygoal [31]
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4 years ago
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