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NeX [460]
3 years ago
6

I need help with this plz

Mathematics
1 answer:
Morgarella [4.7K]3 years ago
8 0

Answer:

i would go with B

Step-by-step explanation:

I'm not too sure I'm so sorry but thats my closest guess

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Find the x-intercepts of the parabola with vertex (-5,80) and y-intercept (0,-45). Write your answer in this form (x of 1 , y of
Ivan
A parabola is a quadratic function, and a quadratic can be expressed in vertex form, which is:

y=a(x-h)^2+k, where (h,k) is the vertex (absolute maximum or minimum point of the quadratic)

In this case we are given that (h,k) is (-5,80) so we have so far:

y=a(x--5)^2+80

y=a(x+5)^2+80, we are also told that it passes through the point (0,-45) so:

-45=a(0+5)^2+80

-45=25a+80  subtract 80 from both sides

-125=25a  divide both sides by 25

-5=a, so now we know the complete vertex form is:

y=-5(x+5)^2+80

The x-intercepts occur when y=0 so:

0=-5(x+5)^2+80  add 5(x+5)^2 to both sides

5(x+5)^2=80  divide both sides by 5

(x+5)^2=16  take the square root of both sides

x+5=±√16  which is

x+5=±4  subtract 5 from both sides

x=-5±4 so the x-intercepts are:

x=-1 and -9


7 0
3 years ago
An item on sale costs 95% of the original price. if the original price was $60 , what is the sale price?
Diano4ka-milaya [45]
60×95%
=$57
The sale price is $57.
3 0
3 years ago
Which point is a solution to the system of inequalities graphed here? y ≤ 2x + 2
Vlad [161]

Answer:

D) (5,0)

Step-by-step explanation:

-5x + 4 ≤ y

-25 + 5 ≤ 0

-20 ≤ 0

y ≤ 2x + 2

0 ≤ 2(5) + 2

0 ≤ 27

6 0
3 years ago
Read 2 more answers
2 questions
Alekssandra [29.7K]

Answer:

1. A. $33 loss

2. B

Step-by-step explanation:

1. -26 - 11 - 9 +13 = -33

2. B is the only graph in which the Whole Numbers do not contain a negative or decimal (which are not WNs)

8 0
3 years ago
Please answer what the answer for ? Is.
vitfil [10]

Answer:

5/8

Step-by-step explanation:

A.   2/3 × 4/5 × m = 1/3               B.      4/5 × 2/3 × m = 1/3

      8/15 × m = 1/3                                 8/ 15 × m  = 1/3                                    

                 m = 1/3 ÷ 8/15                                 m = 1/3 ÷ 8/15

                  m = 1/3 ×15/8                                 m = 1/3  × 15/8

                  m = 5/8                                          m = 5/8        

C.  2/3 × 4/5 = 1/3 ÷ m        

            8/15 =  1/3 ×  1/m

            8/15 = 1/3m                   cross multiply  

           (3m) × (8) = 15

                24m = 15

                     m = 15/24

                     m=  5/8

4 0
3 years ago
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