All categories

3 years ago

Please show me how to do this!!

Mathematics

1 answer:

Murrr4er [49]3 years ago

7 0

(2x^4 + 3x^2)(x^2-1)
you multiply and you'll get:
2x^8-2x^4+3x^4-3x^2
then add the coefficients with x^4
= 2x^8+1x^4-3x^2

the coefficient for x^4 is 1, so the answer is B

You might be interested in

Help me please thank y’all

Lady_Fox [76]

X equals 125 and y equals 55

3 0

3 years ago

A business has $15,000 to spend on airline tickets to travel to a conference. It wants 27 of its employees to attend. The busine

Marianna [84]

The answer is D because it shows the proper equations for both the number of people and the cost.

7 0

3 years ago

Read 2 more answers

A brick is thrown upward from the top of a building at an angle of 250 above the horizontal, and with an initial speed of 15 m/s

mojhsa [17]

Answer:

(a) 25.08 m

(b) 2.05 m

Step-by-step explanation:

Let the height of the building be 'h'.

Given:

Angle of projection is, $\theta=25$ °

Initial speed is, $u=15\ m/s$

Time of flight is, $t=3.0\ s$

(a)

Consider the vertical motion of the brick.

Vertical component of initial velocity is given as:

$u_y=u\sin\theta\\\\u_y=15\sin(25)=6.34\ m/s$

Vertical displacement of the brick is equal to the height of the building.

So, vertical displacement = $-h$ (Negative sign implies downward motion)

Acceleration is due to gravity in the downward direction. So,

Acceleration is, $g=-9.8\ m/s^2$

Now, using the following equation of motion;

$-h=u_yt+\frac{1}{2}gt^2\\-h=6.34(3)-\frac{9.8}{2}(3)^2\\\\-h=19.02-44.1\\\\-h=-25.08\\\\h=25.08\ m$

Therefore, the building is 25.08 m tall.

(b)

Let the maximum height be 'H'.

At maximum height, the vertical component of velocity is 0 as the brick stops temporarily in the vertical direction.

So, $v_y=0\ m/s$

Now, using the following equation of motion, we have:

$v_y^2=u_y^2+2gH\\\\0=(6.34)^2-2\times 9.8\times H\\\\19.6H=40.2\\\\H=\frac{40.2}{19.6}=2.05\ m$

Therefore, the maximum height of the brick is 2.05 m.

5 0

3 years ago

3. Spiral Review: Solve the equation algebraically. Show all work. Circle your final solution.

AlexFokin [52]

Answer:

z=-13/7

Step-by-step explanation:

1. Add 3z(7z+5=-8)

2. Subtract 5(7z=-13)

3. Divide 7(z=-13/7)

3 0

3 years ago

There are 36 members in the math club Allison brought 81 Browning sister with all the members how many brownies does each member

lapo4ka [179]

Answer:

the correct answer would be 2.25 or 2

3 0

3 years ago