How many real-number solutions does the equation have? 1. –7x² + 6x + 3 = 0
a.one solution
b.two solutions
c.no solutions
d.infinitely many solutions

2.–8x² – 8x – 2 = 0
a.one solution
b.two solutions
c.no solutions
d. infinitely many solutions

Answers

Answer 1

Answer: If the discriminant is negative no real solution exists.
If the discriminant is equal to 0 only one real solution exists.
If the discriminant is positive 2 real solutions exist.
The discriminant:
D = b² - 4 a c
1 ) - 7 x² + 6 x + 3 = 0
D = 6² - 4 · ( - 7 ) · 3 = 36 + 84 = 120 > 0
Answer: b) two solutions
2 ) - 8 x² - 8 x - 2 = 0
D = ( - 8 )² - 4 · ( - 8 ) · ( - 2 ) = 64 - 64 = 0
Answer: a ) one solution

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79/10 as a mixed number

Geometric mean of 1.5 and 84

Answers

2 numbes
add them
1.5+84=85.5
2 numbers so divide that by 2
85.5/2=42.75

Find the sum of the geometric sequence –3, 15, –75, 375, … when there are 9 terms and select the correct answer below.A. -976,563
B.976,563
C.1,464,843
D.976,562

Answers

The correct answer to the question presented above would be letter A. -976, 563. I got this through solving with the first number of the set, then getting the ratio of the data set (which is -5) and the number of terms in the set. Thus, I arrived with the answer, -976, 563.

Answer:

Find the sum of the geometric sequence −3, 15, −75, 375, … when there are 9 terms and select the correct answer below.

-The answer is A. ( −976,563)

Explanation:

Took the test and got it correct.

Is 0.25 kilogram equivalent to any fraction

Answers

equivilent means equals to
0.25 means 25 hundreths
hundreths is 1/100
25 hundreths=25/100=5/20=1/4
so it could be
0.25 kg=1/4kg

0.25 kg is equivalent to 1/4

because 1/4 = 0.25

Hint : Equivalent means equal

I hope that's help !

What is the length of AC?
A.72
B.96
C.136
D.132

Answers

Answer:

The answer is 136 .

Line AB contains points A (−2, 6) and B (4, 5). The slope of line AB is −6 negative 1 over 6 1 over 6 6

Answers

Answer:

The slope is negative $1$ over $6$

Step-by-step explanation:

we know that

The formula to calculate the slope between two points is equal to

$m=(y2-y1)/(x2-x1)$

we have

$A(-2,6)\ B(4,5)$

Substitute the values

$m=(5-6)/(4+2)$

$m=-(1)/(6)$

To work out the slope of a line, you have to divide the difference in y by the difference in x

The difference in y = 5-6 = -1
The difference in x = 4--2 = 6

So, -1/6 is the answer

4x+6 is greater than or equal to 18
find the solution