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Nadusha1986 [10]
2 years ago
14

The question is on the picture

Mathematics
1 answer:
Aleonysh [2.5K]2 years ago
6 0

Answer:

The third one is the correct answer!

Because:

  • there are 2 plots on 39
  • there is 1 plot on 42
  • 1 plot on 44
  • 1 plot on 45
  • 1 plot on 46
  • 3 plots on 48
  • and 1 plot on 51

No more no less.

Hope this helped!

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The monthly cost in dollars of a long distance phone plan is a linear function of the total calling time in minutes. The monthly
Deffense [45]

Answer:

The monthly cost for 45 minutes is $18.42

Step-by-step explanation:

Let

x -----> the total calling time in minutes

y ----> the monthly cost in dollars

we have the ordered pairs

(42,18.15) and (90,22.47)

step 1

Find the slope

The formula to calculate the slope between two points is equal to

m=\frac{y2-y1}{x2-x1}

substitute the values

m=\frac{22.47-18.15}{90-42}

m=\frac{4.32}{48}

m=\$0.09\ per\ minute

step 2

Find the linear equation in point slope form

y-y1=m(x-x1)

we have

m=0.09\\(x1,y1)=(42,18.15)

substitute

y-18.15=0.09(x-42)

step 3

Find the monthly cost for 45 minutes of calls

For x=45 min

substitute the value of x in the linear equation and solve for y

y-18.15=0.09(45-42)

y-18.15=0.09(3)

y-18.15=0.27

y=0.27+18.15

y=18.42

therefore

The monthly cost for 45 minutes is $18.42

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3 years ago
HELP ASAP<br> 1.A term that is a known number without variables. is called?
Natali5045456 [20]

Answer:

constants

Step-by-step explanation:

Constants are the terms in the algebraic expression that contain only numbers. That is, they're the terms without variables. We call them constants because their value never changes, since there are no variables in the term that can change its value.

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Joy ate 1/4 of a pizza. If she divides the rest of the pizza into pieces equal to 1/8 pizza for her family how many pieces will
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Please need help, Will give brainiest!!!!
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Use lagrange multipliers to find the shortest distance, d, from the point (4, 0, −5) to the plane x y z = 9.
zlopas [31]
One function you would be trying to minimize is 
<span>f(x, y, z) = d² = (x - 4)² + y² + (z + 5)² </span>

<span>Your values for x, y, z, and λ would be correct, but </span>
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<span>d² = 64/3 </span>
<span>d = 8/sqrt(3) = 8sqrt(3)/3</span>
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