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Sergeu [11.5K]
3 years ago
12

NEED HELP ASAP WILL GIVE BRAINLIEST

Mathematics
1 answer:
saveliy_v [14]3 years ago
3 0

Answer: x=-2 and y=-2

Step-by-step-explaination:

To solve the system of equations you have to cancel out a variable. I chose to cancel out Y. First, the coefficients of y need to be the same in both equations. To do this multiply to the top equation by 2 so you get

2(2x) +2(y) = 2(-6)

4x + 2y = -12

Next, subtract the second equation from the first to cancel out the y’s

4x + 2y =-12

-(-8x + 2y = -12)

————————

12x = -24

Solve

X = -24/12

X=-2

Plug x into the original equation to find y

2(-2) + y = -6

-4 + y = -6

Y = -6 +4

Y=-2

You can substitute x and y into the original equations to double check

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I only really need the domain and range, intervals, and end behavior. My Precalculus class never covered piecewise functions so
Serjik [45]

(a)

Domain:

we know that domain is all possible values of x for which any function ios defined

Here, curve is defined for all values of x

so, domain is

(-\infty,\infty)

Range:

Range is all possible values of y for which x is defined

minimum value of y is -4

maximium value of y is +inf

so, range is

[-4,\infty)

(b)

x-intercept:

It is the value of x where f(x)=0

so, the point where curve intersects on x-axis

and we get

2x^2-4=0

x=\sqrt{2}

and

x=-5

(c)

Increasing interval:

where curve is moving upward

we can see that

(0,\infty)

Decreasing interval:

where curve is moving downward

we get

(-\infty,-1)U(-1,0)

Constant:

constant means horizontal line

there is no horizontal line here

so, it does not exist

(D)

End behavior:

when x-->+inf

y is moving upward

so, y---->+inf

when x-->-inf

y is moving upward

so, y---->+inf

(E)

we can see that curve jupms at x=-1

so, there is discontinuity at x=-1

and this is jump type of discontinuity

(F)

For odd:

f(-x)=-f(x)

For even:

f(-x)=f(x)

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3 0
3 years ago
What is the mean of the data set 125, 141, 213, 155, 281
icang [17]

Answer:

183

Step-by-step explanation:

The mean is the average. You find it by adding 125 + 141 + 213 + 155 +281.

This renders a sum of 915, which you then divide by the number of numbers you added, 5.

915 ÷ 5 = 183

6 0
3 years ago
15. Which statement about the fractions 5/10 and 6/12 is true?
ivanzaharov [21]

Answer:

D

Step-by-step explanation:

they're both 1/2 and the denominators are bigger than the numerators.

4 0
2 years ago
The formula for the circumference, C, of a circle with given radius, r, is C = 2nr.
LekaFEV [45]

Answer:

C. 22

Step-by-step explanation:

C = circumference

n (pi) = 22/7

r = 3 1 /2

Plug in the numbers for each variable.

C = 2x (22/7) x (3 1/2)

Change the mixed number inIto an improper fraction by multiplying 3 x 2 and adding the 1 which gives us 7 over 2 because 2 is our denominator  so, 3 1/2 = 7/2. It also helps to have 1 as the denominator for 2.

C = (2/1) x (22/7) x (7/2)

Lastly, just multiply the numerators across which give us 308 then multiply the denominators across which gives us 14, so then we divide 308 by 14 and get 22.

6 0
3 years ago
F(x)= 3x+10 and g(x)= 3x-7
Orlov [11]

Answer:

1.     x=-10/3

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Step-by-step explanation:

plsssssssss mark me brainliest I need one more

4 0
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