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luda_lava [24]
3 years ago
7

The minute hand of a certain clock is 4 in long. Starting from the moment when the hand is pointing straight up, how fast is the

area of the sector that is swept out by the hand increasing at any instant during the next revolution of the hand?
Mathematics
1 answer:
aliya0001 [1]3 years ago
3 0
  <span>A = πr² * t/60 
dA/dt = πr²/60 = π*4²/60 = 4π/15

Hope this helps!
STSN</span>
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Simply 9+3(8-3(7-5))-4
EastWind [94]

Answer:

11

Step-by-step explanation:

  1. 9+3(8-3(7-5))-4
  2. 9+3(8-3(2))-4
  3. 9+3(8-6)-4
  4. 9+3(2)-4
  5. 9+6-4
  6. 15-4
  7. 11

I first delt with simplifying the parentheses till step five. Then in five I just added 9+6 because it came before the -4. But PEMDAS is very important when doing these problems because it tell you the order

  • P (parentheses)
  • E (exponents)
  • M (multiply)
  • D (divide)
  • A (add)
  • S (subtract)
  • **the biggest thing is that with multipe and divide it depends what comes first. If you see divide before multipe in the problem just do it that way. It is the same way with add and subtract but The multiple/divide group ALWAYS comes BEFORE add/subtract
4 0
3 years ago
7- Simplify each expression.<br> -8+2(-5)
postnew [5]

Answer:

-18

Remember PEMDAS.

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
A carpenter can install 8 sheets of drywall in 10 minutes. At this rate, how long does it take to install one sheet of drywall?
grigory [225]

Answer:

8/10=60/x

600/8=75 minutes=x

Good day! :)

7 0
3 years ago
Read 2 more answers
The equation of a line is y=-2x+1. What is the equation of the line that is parallel to the first line and passes through (2,2)?
Murrr4er [49]

Answer:

The equation in slope-intercept form is y=-2x+6.

The equation in standard form is 2x+y=6.

The equation in point-slope form is y-2=-2(x-2).

Step-by-step explanation:

The slope-intercept form of a line is y=mx+b where m is the slope and b is the y-intercept.

Parallel lines will have the same slope and different y-intercept.

Anyways the slope of y=-2x+1 is -2.

So the equation of our line we are looking for is -2.

So we know our equation is in the form y=-2x+b.

We must inf b using y=-2x+b with (x,y)=(2,2).

y=-2x  +b  with (x,y)=(2,2)

2=-2(2)+b

2=-4+b

Add 4 on both sides:

2+4=b

Simplify:

6=b

The equation is y=-2x+6.

Now it didn't say what form it wanted.

There are some forms I can give you like standard and point-slope form.

There is also general form but it is not too much different from standard form.

Standard form is ax+by=c where a,b, and c are integers if possible.

Point-slope form is y-y1=m(x-x1) where (x1,y1) is a point on the line and m is the slope.

So let's go for standard form (ax+by=c) first:

y=-2x+6

add 2x on both sides:

2x+y=6

This is standard form because it is in the form

ax+by=c.

Ok we know point (2,2) is on our line and we also know we have slope,m, is -2.

Point-slope form is

y-y1=m(x-x1)

y-2=-2(x-2)

8 0
3 years ago
Could someone please help, I have been stuck on this for an hour.//
Slav-nsk [51]
I can't answer unless you can provide a picture. Send a pic and I'll help!
4 0
3 years ago
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