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IrinaK [193]
3 years ago
12

Problem 5

Mathematics
1 answer:
marysya [2.9K]3 years ago
5 0

Answer:  (x, y) = ( -2, -3 )

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

Work Shown:

2x+y = -7

2( x ) + y = -7

2( 4+2y ) + y = -7 .... plug in x = 4+2y

2*4 + 2*2y + y = -7

8 + 4y + y = -7

5y+8 = -7

5y = -7-8 .... subtract 8 from both sides

5y = -15

y = -15/5 ... divide both sides by 5

y = -3

This y value pairs with...

x = 4 + 2y

x = 4 + 2(-3)

x = 4 - 6

x = -2

So we have (x, y) = (-2, -3) as the solution to the system.

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suppose you drive and average of 15,000 miles per year, and your car gets 24 miles per gallon. Suppose gasoline costs $2.60 per
notka56 [123]

Answer:

<em>$1,625</em>

Step-by-step explanation:

If looking for the overall cost, (the total amount spent of gasoline):

Step 1: find the number of gallons used

Miles per year / miles per gallon

<em>15,000 ÷ 24 = 625</em>

Step 2: find the total cost

Number of gallons use x rate of cost.

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The total amount of money spent is $1,625

6 0
3 years ago
Substitution method
andriy [413]
1. y=7-3x
4x+2(7-3x)=16
4x+14-6x=16
-2x=2
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y=10
(-1,10)

2. x=2y
2(2y)+2y=4
4y+2y=4
6y=4
y=2/3
x-2(2/3)=0
x-4/3=0
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(4/3,2/3)
8 0
4 years ago
Read 2 more answers
Find the area between the graph of the given function and the x-axis over the given interval, if possible.
icang [17]

Answer:

Not possible to find out area

Step-by-step explanation:

Given is an exponential function as

f(x) =e^{-x} and we have to find the area to the left of e above x axis under the curve.

Using integrals, we find area =

\int\limits^e_{-\infty}  e^{-x}  \, dx\\=-e^{-x}

substitute limits

When we substitute -infinity we get e^infty which is again infinity

Hence finding out area is not possible.

The integral of area diverges.

7 0
4 years ago
1. 1/|x-1|&gt;=0<br> 2. 1/|x-1|&lt;=0<br> 3. |x/(x-1)|&gt;0<br> 4. |x/(x-1)|&lt;0
babunello [35]
I think the answer is 4

7 0
3 years ago
What two consecutive odd integers have a sum of 88?
Sindrei [870]

Answer:

What two consecutive odd integers have a sum of 88? x + x + 2 = 88 • 2x + 2 = 88 • 2x = 86 • x = 43, x + 2 = 45 • 43 + 45 = 88 • Ans: 43, 45 • They equal 88 and are both odd.

3 0
3 years ago
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