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Ostrovityanka [42]
3 years ago
9

If x+y=15 and x-y=-19 then what does xy=?

Mathematics
1 answer:
ratelena [41]3 years ago
4 0

Answer:

xy=34

Step-by-step explanation:

Use elimination:

x+y=15

x-y+-19

2x=-4

x=-2

Plug -2 into x

-2+y=15

y=17

17 multiplied by -2 is 34

I dont know if you mean (x, y) or not but the answer to that would be (-2, 17).

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How would the Holy Spirit help the apostles? What would the Holy Spirit enable the apostles to do?
Lynna [10]

Answer:

The Holy Spirit would help the Apostles just like the Holy Spirit helps we the people. The Holy Spirit would guide them to go through the right paths closer to paradise and help them make the correct decisions. Instead of judging the Apostles,  the Holy Spirit would correct them of their doings of wrong. The Holy Spirit would enable the Apostles to spreads God's Word throughout the world.

6 0
3 years ago
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Biologists have found that the number of chirps some crickets make per minute is related to temperature. the relationship is ver
aalyn [17]

Answer:

It is 74.24 degrees Fahrenheit when the crickets are chirping 150 times a minute.

Variables x = Chirps and  y = Degrees

y-intercept = 38.24

slope = 0.24

Step-by-step explanation:

As the chirps are 124 times per minute for 68 degrees Fahrenheit we will consider it in (x_1,y_1) = (124,68).

Now when the chirps are 172 times and temperature is 80 degrees we consider it (x_2,y_2) = (172,80).

To find the slope we can use point-slope formula.

Where m is the slope and m=\frac{y_2-y_1}{x_2-x_1} =\frac{80-68}{172-124}= 0.24

To find y-intercept we will plug out the value of slope in y=m(x)+b choosing point (x_1,y_1) = (124,68).

So b=y-m(x) =68-124(0.24) =68-29.76=38.24

And the equation is y=0.24(x)+b

To calculate temperature for 150 chirpings we have to plug x=150 and b=38.24 in our above equation which is in form of y=m(x)+b

y=0.24(x)+b

y=0.24(150)+38.24=74.24\approx 75 degrees Fahrenheit.

Finally we have :

Temperature 74.24 degrees Fahrenheit.

With variables x = Chirps and  y = Degrees

y-intercept = 38.24 and

slope = 0.24

6 0
3 years ago
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Answer:

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Step-by-step explanation:

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4 years ago
If the interior angle of a regular polygon measures 108° how many sides does a polygon have
Marta_Voda [28]

Answer:

5 sides

Step-by-step explanation:

The quickest way to answer this is to use the fact the exterior angles of a polygon add to 360.

If the interior angles are each 108, then the exterior angles are each 180 - 108 = 72. (using the fact that the Interior angle + exterior angle adds to 180)

Next, we just work out 360 ÷ 72 = 5.

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Answer:

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