First, you have to align the like terms next to each other so that it will be easier to combine like terms. (Like terms have the same variables and powers)

$6x^3+(-2x^3)+2x^2+5x^2+9x+3x$

Combine like terms:

(When combining like terms all you have to do is add/subtract the coefficients, number in front of variables, and leave the variable and exponents)

$6x^3+(-2x^3)= > 6x^3-2x^3=4x^3$

$2x^2+5x^2=7x^2$

$9x+3x=12x$

So, we get $4x^3+7x^2+12x$

3 0

9 months ago

if an objects starts at 1,000 feet, and falls at a speed of 200mph how long will it take to reach 500 feet

EastWind [94]

Answer:

2.8 in a half years

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

A, B, C, D, E and F are points on a circle. put crosses on the ends of the line that is a diameter of the circle

Step2247 [10]

9514 1404 393

Answer:

AD is the diameter

Step-by-step explanation:

Angles in a triangle have a sum of 180°, so inscribed angle B is 80° and inscribed angle E is 90°.

An inscribed angle subtends an arc that is twice its measure, so arcs ABD and AED are both 180°. That makes chord AD a diameter.

Points A and D need your cross markings. AD is a diameter of the circle.

3 0

2 years ago