All categories

3 years ago

If x=3 is a solution of the equation x^2+kx+15=0, find the value of k. Hence find the other solution of the equation

Mathematics

1 answer:

eimsori [14]3 years ago

3 0

X^2 + kx + 15 = 0
3^2 + 3k + 15 = 0
9 + 3k + 15 = 0
24 + 3k = 0
3k = -24
k = -24/ 3
k = -8

You might be interested in

What is 70% of 40,000.

timurjin [86]

Answer:

x = 28,000

Step-by-step explanation:

"What" is our unknown, x; "is" is an equals sign; 70% expressed as a decimal is .70; "of" means to muliply.

Our equation, then, is

x = .70(40,000) so

x = 28,000

5 0

3 years ago

Read 2 more answers

Leah wrote 2 different fractions with the same denominator. both fractions were less than 1. can their sum equal 1? explain

grandymaker [24]

Yes. Their sum can be equal to 1 because if they have the same denominator they will add easier like 3/4 and 1/4 or 1/2 and 1/2. All of them have the same denominator and still equal 1

8 0

3 years ago

What is 1/2 of 1% of 190 tons?

alex41 [277]

1% of 190 = 190 / 100 = 1.9 tons

1/2 of this = 0.95 tons Answer

5 0

3 years ago

Someone please help me on this!

Alexxx [7]

Answer & Step-by-step explanation:

This can be proven with the SAS theorem (side-angle-side)

With a perpendicular bisector, the line it bisects is cut directly in half. This creates two equal sides:

$GJ=IJ$

and it creates two 90° angles:

∠ $GJH=$ ∠ $IJH$

And because of the reflexive property of congruence:

$JH=JH$

Side-Angle-Side.

:Done

6 0

3 years ago

A(x)= 3m(x)+4 in standard form

Leviafan [203]

Answer:

a(x)= 3mx+4

Step-by-step explanation:

have a lovely day <3

6 0

2 years ago