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valentinak56 [21]
3 years ago
5

Find the value of (x+5y)' step by step

Mathematics
2 answers:
lbvjy [14]3 years ago
8 0
Answer:
X^2 +10xy + 25y^2
larisa86 [58]3 years ago
7 0

Answer:

x²+10xy+25y²

Step-by-step explanation:

(x+5y)²=(x+5y)(x+5y)=x×x+5y×x+x×5y+5y×5y=x²+5xy+5xy+25y²=x²+10xy+25y²

But it can be much easier

(a+b)²=a²+2ab+b²

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3 years ago
A phone plan charges $15.95 per month and $0.10 for every minute, m, that the phone is used. Mr. Kordemsky wants his phone bill
aleksandrvk [35]

Answer:

The inequality that could be used to model this situation is 15.95+0.10m<40. Also, the number of minutes has to be less than 240.5 for Mr. Kordemsky's phone bill for the month to be less than $40.

Step-by-step explanation:

From the information provided, the inequality would indicate that the phone bill for the month that is equal to the result of the fixed fee plus the price per minute for the number of minutes has to be less than $40, which can be expressed as:

15.95+0.10m<40

Now, you can solve for m:

15.95+0.10m<40

0.10m<40-15.95

0.10m<24.05

m<24.05/0.10

m<240.5

According to this, the answer is that the inequality that could be used to model this situation is 15.95+0.10m<40. Also, the number of minutes has to be less than 240.5 for Mr. Kordemsky's phone bill for the month to be less than $40.

6 0
3 years ago
On a​ zip-line course, you are harnessed to a cable that travels through the treetops. You start at platform A and zip to each o
Shalnov [3]

Answer:

We have to travel 26.93 units from platform B to C.

Step-by-step explanation:

Length of a segment having coordinates (x_1,y_1) and (x_2,y_2) is determined by the formula,

d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

From the graph attached,

Coordinates of the points B and C are (-25, -20) and (-15, 5) respectively.

Distance between these points B and C Or length of BC will be,

BC = \sqrt{(-25+15)^2+(-20-5)^2}

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     = \sqrt{725}

     = 5\sqrt{29}

     = 26.93 units

Therefore, we have to travel 26.93 units from platform B to C.

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