What single decimal multiplier would you use to increase by 9% followed by a 6% decrease?

28.8

Step-by-step explanation:

To increase or decrease an amount by a percentage, first calculate the percentage of the amount and then either add this answer on to increase the quantity, or subtract this answer to decrease the quantity. There is more than one way to find the percentage of an amount.

Examples

Increase £50 by 8%.

Using the multiplying method, first find 8% of £50:

\frac{8}{100} \times 50 = \frac{8}{100} \times \frac{50}{1} = \frac{400}{100} = 4

8% of £50 is £4, so to increase £50 by 8%, add the £4 onto the £50, which is £54.

Decrease 72 kg by 40%.

Using the 10% method, first find 40% of 72 kg:

10% = 72 \div 10 = 7.2

10% = 7.2, so 40% = 7.2 \times 4 = 28.8

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

answer: i'm great at algebra

~coco

step-by-step explanation: