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Julli [10]
4 years ago
14

How many solutions does the system below have? y=1/2x+1 2y - x = 2

Mathematics
1 answer:
kvasek [131]4 years ago
3 0

Answer:

infinitely many

Step-by-step explanation:

Rewrite these equations as

y = (1/2)x + 1

2y = x + 2

and then solve the second for y:  y = (1/2)x + 1.  Note that these end results are identical.  The two lines coincide; that is, one lies right on top of the other.  Thus, there  are infinitely many solutions.

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5) Jessica has to take a train from New York to New Jersey. She looks at the map to plot her route. If 1cm equals 10
Greeley [361]

Answer:

48 miles

Step-by-step explanation:

3 0
3 years ago
A man buys a racehorse for $20,000 and enters it in two races. He plans to sell the horse afterward, hoping to make a profit. If
victus00 [196]

Answer:

The expected profit is $10,600.

Step-by-step explanation:

The expected profit can be calculated as the sum of the possible outcomes weighted by their probability of occurrence.

In this case, there are four possible outcomes:

1) The horse win both races. The value of the horse will be $100k-$20k=$80k.

The probability of this outcome is:

P(ww)=P(w1)*P(w2)=0.2*0.3=0.06

2) The horse win the first race, but lose the second one. The value will be $50k-$20k=$30k.

The probability is:

P(wl)=P(w1)*(1-P(w2))=0.2*(1-0.3)=0.2*0.7=0.14

3) The horse lose the first race, but win the second one. The value will be $50k-$20k=$30k.

The probability is:

P(lw)=(1-P(w1))*P(w2)=(1-0.2)*0.3=0.8*0.3=0.24

4) The horse lose both races. The value will be $10k-$20k=-$10k.

The probability is:

P(lw)=(1-P(w1))*(1-P(w2))=(1-0.2)*(1-0.3)=0.8*0.7=0.56

Then, the expected profit can be calculated as:

E(x)=\sum\limits^4_{i=1} {p_ix_i}\\\\E(x)=0.06*80,000+0.14*30,000+0.24*30,000+0.56*(-10,000)\\\\E(x)=4,800+4.200+7,200-5,600=10,600

6 0
3 years ago
Lines m and n are parallel. Line m is described by y=4x+2. Line n contains the point (1, -3). Which of the following is an equat
Semmy [17]

The equation of <em>line m</em>, in point-slope form is: y + 3 = 4(x - 1)

<em><u>Recall:</u></em>

  • The slopes of parallel lines are equal to each other.
  • Slope-intercept form equation is: y = mx + b, where m is slope and b is y-intercept.
  • Point-slope form equation is: y - y_1 = m(x - x_1) where, (x_1, y_1) is a point and m is the slope.

Equation of line m is y = 4x + 2

Slope of line m is 4

Since line m and line n are parallel, both lines will have the same slope. Therefore, the slope of line n is 4.

To write the equation for line if it contains the point (1, -3), substitute (x_1, y_1) = (1, -3) and m = 4 into y - y_1 = m(x - x_1):

y - (-3) = 4(x - 1)\\\\\mathbf{y + 3 = 4(x - 1)}

Therefore, the equation of <em>line n</em>, in point-slope form is: y + 3 = 4(x - 1)

Learn more about point-slope equation on:

brainly.com/question/24907633

4 0
3 years ago
A maximum value does not exist for which of the following functions ?
Aleksandr-060686 [28]
Ufff lap his tech the task ter he’d just ice up
7 0
3 years ago
(PHOTO) Please help me need this done by tomorrow thank you.​
katrin [286]

Answer:

x = 13

Step-by-step explanation:

Corresponding angles equal one another.

8x-20=4x+32\\4x-20=32\\4x=52\\x=13

8 0
3 years ago
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