The graph of a parabola in the xy-plane has the following characteristics. It opens downward. It has an x-intercept at the point (5,0). Its vertex is at the point (2,18). Which of the following is the equation of the parabola? y=−2(x+1)(x−5) y equals, negative 2 times, open parenthesis, x plus 1, close parenthesis, times, open parenthesis, x minus 5, close parenthesis A y=−(x+1)(x−5) y equals, negative, open parenthesis, x plus 1, close parenthesis, times, open parenthesis, x minus 5, close parenthesis B y=−1821(x−5)(x+5) y equals, the negative fraction 18 over 21, end fraction, times, open parenthesis, x minus 5, close parenthesis, times, open parenthesis, x plus 5, close parenthesis C y=187(x−1)(x+5) y equals, the fraction 18 over 7, end fraction, times, open parenthesis, x minus 1, close parenthesis, times, open parenthesis, x plus 5, close parenthesis D Submit

the answer is 510

step-by-step explanation:

15 • 13 = 195

15 • 12 = 180

15 • 5 = 75

12 • 5 = 60

195 + 180 = 375

375 + 75 = 450

450 + 60 = 510

coin flip

non-answer:

choosing

sorry if this isnt what you're looking for i dont really understand the question

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.

1.3

step-by-step explanation:

3x2=6   9x+6

bring down the 6 on both sides

6+6=12

12= 9x

divide by 9

12/9 =

1.3 =x