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ss7ja [257]
3 years ago
11

Which of the following lists of ordered pairs is a function?

Mathematics
1 answer:
Hitman42 [59]3 years ago
7 0
I think it’s C but I’m not sure
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What will be the total watt demand for the living area of this Dwelling?
natka813 [3]
Https://www.ecmweb.com/national-electrical-code/code-basics/article/20886603/dwelling-unit-calculations
5 0
3 years ago
Draw and label the final image of △ABC after the given sequence of transformations. Reflect △ABC over the y−axis and then transl
arlik [135]

Answer: The correct option is A.

Explanation:

From the given figure it is noticed that each box in the graph represents the length of 2 units. The coordinates of point A,B and C are (-1,1),(-3,3) and  (-2,4) respectively.

If a point reflects over the y-axis then,

(x,y)\rightarrow(-x,y)

So after reflecting coordinates of point C become,

(-2,4)\rightarrow(2,4)

If a point translated by (a,b), then

(x,y)\rightarrow(x+a,y+b)

So, after reflection over y-axis followed by translation by (2,-2), the coordinate of C are,

(2,4)\rightarrow(2+2,4-2)\\(2,4)\rightarrow(4,2)

Similarly the image of point A and B are (3,-1) and (5,1) respectively.

The image of C after reflection over y-axis followed by translation by (2,-2) is (4,2), which is shown in only graph A, Therefore A is the correct option.

8 0
3 years ago
Find the discriminant, and determine the number of real solutions. then solve x^2 +8x+20=0
vodomira [7]

Answer:

Part 1) The quadratic equation has zero real solutions

Part 2) The solutions are

x_1=-4+2i   and x_2=-4-2i

Step-by-step explanation:

we know that

The formula to solve a quadratic equation of the form ax^{2} +bx+c=0 is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

x^{2}+8x+20=0  

so

a=1\\b=8\\c=20

The discriminant is equal to

D=(b^{2}-4ac)

If D=0 -----> the quadratic equation has only one real solution

If D>0 -----> the quadratic equation has two real solutions

If D<0 -----> the quadratic equation has two complex solutions

<em>Find the value of D</em>

D=8^{2}-4(1)(20)=-16 -----> the quadratic equation has two complex solutions

<em>Find out the solutions</em>

substitute the values of a,b and c in the formula

x=\frac{-8(+/-)\sqrt{8^{2}-4(1)(20)}} {2(1)}

x=\frac{-8(+/-)\sqrt{-16}} {2}

Remember that

i=\sqrt{-1}

x=\frac{-8(+/-)4i} {2}

x_1=\frac{-8(+)4i} {2}=-4+2i

x_2=\frac{-8(-)4i} {2}=-4-2i

8 0
3 years ago
Simplify. –24 – 8 ÷ (–4) <br> A. –22 <br> B. –8 <br> C. –26 <br> D. 8
pishuonlain [190]
Hi there! The answer is A. - 22 

We can use PEMDAS to find our answer, which says divide first (before adding).

- 24 - 8 : (-4) = 

Since we divide two negative numbers, we end up with a positive value.
- 24 + 2 = 

Now we can add 
-24 + 2 = -22
8 0
3 years ago
Read 2 more answers
Angie is on a road trip, and is reading a map that has a scale of 1 in: 40 miles. Her trip measures 5.5 inches on the map. What
WARRIOR [948]

Answer:

A. 220 miles

Step-by-step explanation:

You can multiply to find the answer. 5.5 times 40 = 220 miles.

7 0
2 years ago
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