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slavikrds [6]
3 years ago
10

A survey of 14 middle school students showed the mean number of minutes students talked on the cell phone in a week was 133. Wha

t is the total number of minutes those students talked in a week?
Mathematics
1 answer:
Orlov [11]3 years ago
4 0
Roughly 1862 minutes.

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The length of a rectangle is 7 inches longer than it is wide. If the area is 170 square inches, what are the dimensions of the r
Luden [163]

Answer:

The length of a rectangle is 7 inches longer than it is wide. If the area is 170 square inches, what are the dimensions of the rectangle?

Answer by Cromlix(4381)   (Show Source): You can put this solution on YOUR website!

x = width x + 7 = length

x(x+7) = 170

x^2 + 7x - 170 = 0

(x + 17)( x - 10)

Therefore x = 10 as x = -17 no answer.

Width = 10 inches

Length = 17 inches

3 0
2 years ago
25 POINTS! Answer needed ASAP! You WILL be named Brainiest!
bija089 [108]

Answer:

We need to send more than 400 messages for Plan B to be the better option.

Step-by-step explanation:

Plan A

The cost is a flat fee of 30 plus 10 cents per message

Cost= 30 +.10m

Plan B

The cost is a flat fee of 50 plus 5 cents per message

Cost = 50 +.05m

We want cost of B to be less than cost A

30 +.10m > 50 +.05m

Subtract .05m from each side

30 +.10m- .05m > 50 +.05m-.05m

30 +.05m > 50

Subtract 30 from each side

30-30 +.05m > 50-30

.05m > 20

Divide each side by .05

.05/.05m > 20/.05

m > 400

We need to send more than 400 messages for Plan B to be the better option.

4 0
3 years ago
6. Six people are running a race. In how
Pepsi [2]

Answer:

a

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Find the x-coordinates where f ' (x)=0 for f(x)=2x+sin(4x) in the interval [0, pi]
MAVERICK [17]

Answer:

The x-coordinate is \dfrac{\pi}{6}[/tex].

Step-by-step explanation:

We are given a function f(x) as:

f(x)=2x+\sin (4x)

Now on differentiating both side with respect to x we get that:

f'(x)=2+4 \cos (4x)

When f'(x)=0

this means that 2+4\cos (4x)=0\\\\4\cos (4x)=-2\\\\\cos(4x)=\dfrac{-1}{2}

Hence, cosine function takes the negative value in second and third quadrant but we have to only find the value in the interval [0,\pi].

also we know that \cos (\dfrac{2\pi}{3})=\dfrac{-1}{2}----(1) (which lie in the second quadrant)

so on comparing our equation with equation (1) we obtain:

4x=\dfrac{2\pi}{3}\\\\x=\dfrac{\pi}{6}

Hence, the x-coordinates where f'(x)=0 for f(x)=2x+\sin(4x) is \dfrac{\pi}{6}.

5 0
3 years ago
What is the slope of the line that goes through the points (7,10) and (3,-3)
PilotLPTM [1.2K]
Ypu would subtract Y from the other points Y
- 3 - 10 =  - 13
Then you would subtract X from the ither points X.
3 - 7 =  - 4
Then you would put the Y value over the X
\frac{ - 13}{ - 4}
Then simiplify
\frac{13}{4}

7 0
3 years ago
Read 2 more answers
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