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denis-greek [22]
3 years ago
5

Neeeeeed the help please

Mathematics
1 answer:
lions [1.4K]3 years ago
8 0
The correct answer is -5/7. Hope this helps.
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What is the vertex of the equation, y= -3x^2+2x-7?
Genrish500 [490]

A

Given a quadratic in standard form : y = ax² + bx + c ( a ≠ 0 ), then

The x-coordinate of the vertex is

x_{vertex} = - \frac{b}{2a}

y = - 3x² + 2x - 7 is in standard form

with a = - 3, b = 2 and c = - 7, hence

x_{vertex} = - \frac{2}{-6} = \frac{1}{3}

Substitute this value into the equation for y-coordinate

y = - 3 (\frac{1}{3})² + 2 ( \frac{1}{3}) - 7

  = - \frac{1}{3} + \frac{2}{3} - \frac{21}{3} = - \frac{20}{3}

vertex = ( \frac{1}{3}, - \frac{20}{3}) → A



4 0
3 years ago
Read 2 more answers
Jana paid a $75 initial fee to join a sports club and a monthly fee of $14 per month. Write an expression that shows how much Ja
kozerog [31]

Answer:

y=14x+75 where y is equal to 14x+75. Hope this helps.

Step-by-step explanation:


6 0
3 years ago
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The 2-minute-and-43-second song “You’re Welcome” from the movie Moana has been used in more than 3,000 videos. What percent of t
katrin [286]
Go do your zoom meeting bruh
3 0
3 years ago
Now 11. why is math so hard
nata0808 [166]
A. h = 30Ft * 1.26cm/Ft = 37.8 cm. = Ht. of the model.

37.8cm * 1toothpick/6.3cm = 6 Toothpicks

B. 37.8cm/7.6 = 4.97 hope this helped.
7 0
3 years ago
9. The Science Club needs to rent a bus for a field trip. Main Street Buses charges a $40 rental fee, plus $2 per mile. County B
Basile [38]

Answer:

20 miles $80

Step-by-step explanation:

20 miles

P%5Bc%5D%2820%29=20%2B3%2820%29=20%2B60=80

$80

8 0
3 years ago
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