All categories

2 years ago

What is the value of c so that 9x^2 + 15x + c = 0 has one rational solution

Mathematics

2 answers:

liberstina [14]2 years ago

8 0

Answer:

c = 6.25

Step-by-step explanation:

For this to occur, the discriminant of the quadratic formula must = 0

b^2 - 4ac = 0

15^2 - 4(9)(c) = 0

36c = 225

c = 6.25

valentinak56 [21]2 years ago

6 0

Answer:

c=-9x^2-15x

Step-by-step explanation:

You might be interested in

N–2=10n+4/2 what is the value of n need help asap

MakcuM [25]

N - 2 = 10n + 4/2

-2 = 9n + 4/2

-4/4 = 9n

-1 = 9n

-9 = n

N is -9.

If this answer is right please leave a thanks and a rating. :)

4 0

3 years ago

What’s the answer???(SOMEONE PLEASE HELP ME)

slava [35]

I think it's D. I will admit that I'm an educated guess.

8 0

3 years ago

HELP PLEASE YOU'LL GET 25 POINTS

ollegr [7]

Answer:

Step-by-step explanation:

Im pretty sure

5 0

3 years ago

Read 2 more answers

What is the product of (5 Superscript negative 1 Baseline) (5 Superscript negative 3 Baseline)? StartFraction 1 Over 625 EndFrac

Oksana_A [137]

Answer:

Step-by-step explanation:

Given the indicinal equation

5^-1/5^-3

According to one of the law of indices, if a, b, m and n are integers then;

a^m/a^n = a^(m-n)

When the base are equal, the powers will be subtracted.

Applying this formula to the given expression

5^-1/5^-3

= 5^{-1-(-3)}

= 5^(-1+3)

= 5^2

= 25

Therefore the answer is 25

5 0

4 years ago

Read 2 more answers

PLEASE HELP ASAP!!

Elza [17]

Answer:

The parabolic equation does not intersect the linear equation.

Explanation:

Given equation's:

y = x² − 5x + 9
y = -2x

To solve , use substitution method by inserting 2nd equation into 1st

$\sf y = x^2 - 5x + 9$

when substituted y = -2x

$\sf -2x = x^2 - 5x + 9$

collect terms

$\sf x^2 - 5x+ 2x + 9=0$

simplify

$\sf x^2 - 3x + 9=0$

Find discriminant:

$\sf b^2 - 4ac$

$\sf (-3)^2 - 4(1)(9)$

$\sf -27$

As the discriminant is negative, it tell us that they both does not intersect each other.

7 0

2 years ago