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Sophie [7]
3 years ago
13

Find the solution of the system of equations. 3x+3y= −6 10x+3y= −13

Mathematics
1 answer:
Fittoniya [83]3 years ago
6 0

Answer:

x=−1, y=−1

Step-by-step explanation:

Solve for x in the first equation.

x=−2−y

10x+3y=−13

Replace all occurrences of x with −2−y in each equation.

−20−7y=−13

x=−2−y

Solve for y in the first equation.

y=−1

x=−2−y

Replace all occurrences of y with −1 in each equation.

x=−1, y=−1

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Find a polar equation for the curve represented by the given cartesian equation. X2 + y2 = 2cx
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Hi,


Work:

Equation;

x2 + y2 = 2cx

Factor out 2x from expression.


2x \times (1 + yc)

Use commutative property to reorder yc.

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Hope this helps.
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3 years ago
Stacey and Jeremy sent out 380 wedding invitations. They have received 127 responses. What does q represent in the equation 380
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Q=253, which is the number of responses they have not received
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-20.00% is the percent decrease

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Step-by-step explanation:

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2 years ago
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Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 99 people
sertanlavr [38]

Answer:

The probability of getting someone in the 18-21 age bracket or someone who agreed to respond = 0.365

Step-by-step explanation:

The counts are as follows  

Age Group  No of people contacted No of refusals      Total  

18-21               88                                  8                       96

22-29              240                                  42                       282

Total              328                                  50                       378

 

The probability of getting some one in the age bracket of 18-21 or some one who refused to respond is

= \frac{96}{378} + \frac{50}{378} - \frac{8}{378} \\= \frac{96+50-8}{378} \\= \frac{138}{378} \\= 0.365

8 0
3 years ago
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