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3 years ago

A parabola has a vertex at (-2,6) and roots at 7 and m. Find the value of m

Mathematics

1 answer:

Archy [21]3 years ago

8 0

Answer:

So m= - 11

Step-by-step explanation:

* THe vertex is (-2,6), then the equation is y = a(x+2)^2 +6, a is to find out.

* A root is 7 means x=7 and y=0, then :

0 = a(7+2)^2 +6

0=81a+6 or a= -6/81 = -2/27.

* We have the equation: y= -2/27 (x+2)^2 +6=-2/27 [ (x+2)^2-81]

y= -2/27 (x-7)( x+11).

So m= - 11

Hope that you understand.

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Find the slope of the line passing through the points<br> (-4,-3) and (8,-9)

Ilia_Sergeevich [38]

The answer is -1/2

Rise/run
X=run
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y2-y1/x2-x1
(-9)-(-3)/(8)-(-4)
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Brainliest my answer if it helped you out?

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3 years ago

15% of the students in the library have brown eyes. If there are 9 students with brown eyes, how many students are in the librar

Leviafan [203]

Answer:

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6 0

2 years ago

Which expression is equivalent to m² - 13m - 30?

igor_vitrenko [27]

Answer:

$(m−15)(m+2)$

Step-by-step explanation:

$m² - 13m - 30?$

Formula :

${x}^{2} +bx+c$

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<h3>Hope it is helpful...</h3>

3 0

3 years ago

Which equation demonstrates that use of a simple interest formula , l=PRT , to compute the investment earned on $70 at 3% For 12

Alenkinab [10]

Answer:

I = (70) x (0.03) x (12)

Step-by-step explanation:

The general formula of simple interest formula is: I = PRT where I = simple interest, P = principal amount, R = interest rate, T = time (in years). Given that the initial investment is $70, the interest rate is 3% (or 0.03 as a decimal) and the time is 12 years, you can form the following:

I = (70) x (0.03) x (12)

8 0

3 years ago

ITS DUE AT 12 PLZ HELP ME I DONT GET IT

FinnZ [79.3K]

Answer:

a) 1/2, 1/2, 1/2

b) T

c) DEF and TRS are similar

Step-by-step explanation:

a) TR/DE = 9/18 = 1/2

RS/EF = 8/16 = 1/2

TS/DF = 5/10 = 1/2

b) E is the smallest angle on the DEF, and it corresponds w the smallest angle on TRS, R. D corresponds to T, and F to S

they r similar figures - u can see it if u tilt TRS counterclockwise nd flip it

c) they r similar bcuz u can see in part a) that they all have proportional side lengths so yea theyre similar

5 0

2 years ago