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4 years ago

3 is less than or equal to 7+g

Mathematics

1 answer:

Fantom [35]4 years ago

6 0

2≤4 so you have to do that by seeing that 3 iss less that 7

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.2 <br><br> Simplify the expression <br><br> -9 + 2.5y - 0.7y + 1 + 6.4y^2

masya89 [10]

Answer:

6.4y^(2)+1.8y-8

Step-by-step explanation:

got it right edge 2020

6 0

3 years ago

A child wanders slowly down a circular staircase from the top of a tower. With x,y,zx,y,z in feet and the origin at the base of

babymother [125]

Answer:

a) The tower is 90 feet tall

b) She reaches the bottom at t = 18 minutes.

c) Her speed at time t is 5 \sqrt[]{5} ft/minute

d) Her acceleration at time t is 10 ft/minute^2

Step-by-step explanation:

Consider the path described by the child as going down the tower to have the following parametrization $\gamma(t) = (10\cos t, 10 \sin t, 90-5t)$

a) Assuming that the child is at the top of the tower when she starts going down, we have that at the initial time (t=0) we will have the value of the height of the tower. That is z = 90-5*0 = 90 ft.

b) The child reaches the bottom as soon as z =0. We want to find the value of t that does that. Then we have 0 = 90-5t, which gives us t = 18 minutes.

c) Given the parametrization we are given, the velocity of the child at time t is given by $\frac{d\gamma}{dt}= (\frac{d}{dt}(10\cos t), \frac{d}{dt} (10 \sin t ), \frac{d}{dt}(90-5t)) = (-10 \sin t, 10 \cos t, -5)$ . The speed is defined as the norm of the velocity vector,

so, the speed at time t is given by $v = \sqrt[]{(-10 \sin t)^2+(10 \cos t)^2+(-5)^2} = \sqrt[]{100(\sin^2 t + \cos^2 t)+25} = \sqrt[]{125}= 5 \sqrt[]{5}$

d) ON the same fashion we want to know the norm of the second derivative of $\gamma$ .

We have that $\gamma ^{''}(t) =(-10\cost t, -10 \sin t , 0)$ so the acceleration is given by $\sqrt[]{100(\cos^2 t+ \sin^2 t )} = 10$

6 0

3 years ago

Find the value of X.

NikAS [45]

Answer:

x = 109

Step-by-step explanation:

In pentagons, the total degrees for the interior angles is always 540 degrees.

540 = 91 + 160 + 100 + 80 + x

540 = 431 + x

109 = x

I hope this helped!

5 0

3 years ago

Help! ASAP PLEASEEE

jarptica [38.1K]

Answer:

Week and a day

Step-by-step explanation:

You have $30, you save $5 each week and your aunt gives you an extra $10. Equaling out to $15 per week. Since the bike costs $155.75, you subtract your $30, coming out to 125.75 then you divide it by 15 which is 8 days

8 0

4 years ago

Read 2 more answers

I need help with this math question

Vitek1552 [10]

Ava took 5 minutes out of 60 in an hour to do half a mile
5×2=10
60/10=6mph

Damon took 3 minutes out of 60
3×2=6
60/6= 10mph

Reina took 4 minutes out of 60
4×2=8
60/8= 7.5mph

3 0

4 years ago