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Dafna1 [17]
3 years ago
7

Determine which functions have two real number zeros by calculating the discriminant, b2 - 4ac. Check all that

Mathematics
2 answers:
Nuetrik [128]3 years ago
8 0
Find the standard form of the equation of the parabola with a focus at (-4, 0) and a directrix at x = 4.
dezoksy [38]3 years ago
8 0

Answer:

A, C, D, F

Step-by-step explanation:

Just did it on Ed

Would you mind giving me the brainliest?

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Which equation could have been used to create this function table?
ratelena [41]
For multiple-choice questions, it is often faster to check the answers than to try to figure out what the answer should be.

Only selections (A) and (D) match the first entry in the table.
Of those, only selection (A) matches the second entry in the table.

The appropriate choice is ...
   (A) y = x + 9
3 0
3 years ago
Percents! Please answer!!
Fofino [41]

Answer:

39%

Step-by-step explanation:

83-last price

83 last price

100 x ?

100 * last price = 83 . x

x= 39

7 0
2 years ago
Hakeem's front porch measures 9 3/4 feet by 4 feet . Estimate the area of his front porch.
Nostrana [21]
Round 9 3/4 to 10 ft

10 × 4 = 40 ft²

answer is 40ft² estimated
6 0
2 years ago
12 seventy fifths written as a decimal
kakasveta [241]
Do you mean the #12 and severe to fifths to a decimals if you are then it's 12.57
3 0
3 years ago
Write the equation of a line perpendicular to 9xplus7yequals6 that passes through the point ​(9​,negative 7​).
andrew11 [14]

k:\ y=m_1x+b_1\\\\l:\ y=m_2x+b_2\\\\k\ ||\ l\iff m_1=m_2\\\\k\ \perp\ l\iff m_1m_2=-1

We have:

k:\ 9x+7y=6\ \ \ |-9x\\\\7y=-9x+6\ \ \ \ |:7\\\\y=-\dfrac{9}{7}x+\dfrac{6}{9}\to m_1=-\dfrac{9}{7}\\\\l:\ y=m_2x+b\\\\l\ \perp\ k\iff-\dfrac{9}{7}m_2=-1\ \ \ \ |\cdot\left(-\dfrac{7}{9}\right)\\\\m_2=\dfrac{7}{9}\to\ l:\ y=\dfrac{7}{9}x+b

We know. The line <em>l</em> passes throught the point (9, -7). Substitute the coordinates of the poin to the equation of line<em> l </em>:

-7=\dfrac{7}{9}\cdot9+b\\\\-7=7+b\ \ \ \ |-7\\\\b=-14

y=\dfrac{7}{9}x-14\ \ \ \ |\cdot9\\\\9y=7x-126\ \ \ \ |-9y\ |+126\\\\7x-9y=126

Answer: y=\dfrac{7}{9}x-14\to7x-9y=126


7 0
3 years ago
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