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4 years ago

15 - (-7) = ?? Please help if you know the answer can you maybe show work or explane how you got the answer thank you :)

Mathematics

1 answer:

Lena [83]4 years ago

5 0

Answer:

Step-by-step explanation:

since a negative times a negative equals a postive the equation becomes 15+7 which is 22

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Plz help me with this ?

chubhunter [2.5K]

Answer:

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Step-by-step explanation:

6 0

3 years ago

What is the sqaure root of 6475839

Ronch [10]

Its 2544.766983
I just used my calculator :)

6 0

2 years ago

a plane is flying horizontally at an altitude of 21000 feet with a ground speed of 875 feet per second. the plane passes directl

Marta_Voda [28]

Answer:

the angle is changing at a rate of 0.0375 rad/s when the time is t=8 seconds

Step-by-step explanation:

since the line D that starts from the spectator and follows the plane has the following equation

D² = x² + H² , where H= altitude of the plane , x= horizontal distance

then for x=v*t , where v=speed of the plane and t=time since the plane has passed overhead , we have for the elevation angle

tan θ = x/y = v*t /H

θ = tan⁻¹ ( v*t /H)

the rate of change in the angle of the spectator's sight θ with the time is

dθ/dt = 1/1+(v*t /H)² * (v/H) = (v/H)/[1+ (v/H)²*t²]

for t=8 seconds

dθ/dt = (875 ft/s/21000 ft)/[1+ (875 ft/s/21000 ft)²*(8 s)²] = 0.0375 rad/s

therefore the angle is changing at a rate of 0.0375 rad/s when the time is t=8 seconds

6 0

4 years ago

HELPPPPP ME PLEASEEEE

Ne4ueva [31]

Answer:

$y = \sqrt{85}$

Step-by-step explanation:

(11)²=(6)²+ (y)²

121=36 +(y)²

y² =121 –36

y²=85

$y = \sqrt{85}$

4 0

3 years ago

Which of the following shows 21/35 as a simplified fraction?

Vaselesa [24]

The right answer is 3/5

Look at the attached picture

Hope it will help you

Good luck on your assignment

8 0

3 years ago

Read 2 more answers