All categories

3 years ago

What is linear combination?

1 answer:

4 0

In mathematics, a linear combination is an expression constructed from a set of terms by multiplying each term by a constant and adding the results (e.g. a linear combination of x and y would be any expression of the form ax + by, where a and b are constants)

You might be interested in

A line has a slope of -2 and contains the point (1,-1). What is the equation of this line

lakkis [162]

The equation would be -2x+1 because since the slope is 2 the slope intercept equation will help you find the y. Y=-2(1)+1

6 0

4 years ago

-45b+5=67 what is the variable b

lisabon 2012 [21]

Answer:

$\large\boxed{b=-\dfrac{62}{45}}$

Step-by-step explanation:

$-45b+5=67\qquad\text{subtract 5 from both sides}\\\\-45b+5-5=67-5\\\\-45b=62\qquad\text{divide both sides by (-45)}\\\\\dfrac{-45b}{-45}=\dfrac{62}{-45}\\\\b=-\dfrac{62}{45}$

3 0

3 years ago

Evaluate the expression when a=4, b=−5, and c=−8. (−b)+c=

hodyreva [135]

Answer:

-3

Step-by-step explanation:

(−b)+c=

Let b = -5 and c = -8

- (-5) + -8

5 -8

-3

7 0

3 years ago

Read 2 more answers

Two planes left simultaneously from the same airport and headed in the same direction towards another airport 3600 km away. The

ExtremeBDS [4]

Answer:

800 kph
600 kph

Step-by-step explanation:

Equation

Let s represent the speed of the faster plane. Then its travel time is ...

time = distance/speed = 3600/s

travel time for the slower plane is ...

time = distance/speed = 3600/(s -200)

The difference in these times is 1.5 hours, so we have ...

3600/(s -200) -3600/s = 1.5

Solution

Multiplying by (2/3)s(s -200), we get ...

2400(s) -2400(s -200) = s(s -200)

s^2 -200s -480000 = 0 . . . . . . . . . . rewrite in standard form

(s -800)(s +600) = 0 . . . . . . . . . . . . . factor

The positive value of s that makes a factor zero is s = 800.

Conclusion

The speed of the faster plane was 800 km/h; of the slower plane, 600 km/h.

_____

Check

The travel time for the faster plane was 3600/800 = 4.5 hours. For the slower plane, 3600/600 = 6 hours, a difference of 1.5 hours.

6 0

3 years ago

Last week John made/has $50.00 from playing the lottery. This week he lost $25.00 playing the same lottery game. What is his per

KiRa [710]

Answer:

He lost 50% and he was 25 left I think

Step-by-step explanation:

6 0

3 years ago