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Step2247 [10]
3 years ago
5

Solve using elimination 6x + 2y = -8 3x - 2y = -19

Mathematics
1 answer:
Jobisdone [24]3 years ago
3 0

Answer:

x=-3, y=5

Step-by-step explanation:

6x + 2y = -8   3x - 2y = -19

Add the two equations together to eliminate y

6x + 2y = -8

3x - 2y = -19

------------------------

9x        = -27

Divide each side by 9

9x/9 = -27/9

x = -3

Now we find y

6x + 2y = -8

6(-3) +2y = -8

-18+2y = -8

Add 18 to each side

-18+18 +2y = -8+18

2y = 10

Divide by 2

2y/2 = 10/2

y =5

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Use the distance formula to write an equation of the parabola with focus F(0, -13) and directrix y=13
babunello [35]

Answer:

-1/52 x^2

Step-by-step explanation:

4p(y-k)=(x-h)^2

4(-13)y=x^2

-52y=x^2

y=-1/52 x^2

3 0
3 years ago
Can someone explain major and minor arcs in relation to circles.
Lelechka [254]
A Major Arc within a circle is something that that is more than half of the circle, and therefore, larger than the minor arc. The way in which this could be used in an example is; Tony has a pizza with 8 slices, 6 of these slices are pepperoni and 2 are chilli beef. In this case, the pepperoni slices are the major arc and the chilli beef slices are the minor arc.
The Major Arc will always be bigger than the minor arc- whether this is 181 degrees to 179, or whether this is 350 degrees to 10 degrees.
The Minor Arc is always the smallest arc, and this can be explained by; Benedict has an apple pie that has 10 slices, between him and his friends, they have eaten four slices. In this case, they have eaten the 'minor arc'
There is a picture attached, and this is the examples of a major and a minor arc.
Hope this has been able to help you :) 

3 0
3 years ago
Melinda has shown that a function, f(x), increases by 4 for every unit in the domain. What does this prove?
inn [45]
It proves The function f(x) is an arithmetic sequence.
5 0
3 years ago
Read 2 more answers
PLEASE HELP I GIVE THANKS
kari74 [83]
 Since the whole length of the rectangle is 8, and the line across isnt exactly in the middle, (but just a little bit farther than the 4 mark) ... Then the correct answer is:
 D. 4 1/2 units
4 0
3 years ago
In a regression equation predicting income (measured in $1000s) with education (measured in years), the intercept (a) equals 1.5
Sindrei [870]

Answer:

a. at zero years of education, income equals $1500

Step-by-step explanation:

The equation for income 'I', as a function of years of education 't' is given by:

i(t) = bt+a

Where b is the regression coefficient and a is the intercept.

The intercept is the value assumed by the function for t = 0 years of education:

i(0) = 0*4 +1.5\\i(0) = 1.5

Since the income function measures income in $1,000s, at zero years of education, income equals $1500

3 0
3 years ago
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