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3 years ago

8

(X-13)(x-21)=0 solve by factoring

2 answers:

Nezavi [6.7K]3 years ago

8 0

Answer:

The answer is X=13

Step-by-step explanation:

liubo4ka [24]3 years ago

7 0

Answer:

13 and 21

Step-by-step explanation:

(X-13)(X-21)=0

(X-13)= 0 or( x-21) =0

in, (X-13) x = 13 and in ( x-21) x = 21

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The sum of three numbers is 85. The second is 7 more than the first. The third is 2 more than four times the second. Find the nu

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Let x=the first number
Then x+7=second number
And 4(x+7)+2=third number (2 more than 4 times the second)
Now we are told that:
x+(x+7)+(4(x+7)+2)=85 get rid of parentheses
x+x+7+4x+28+2=85 simplify
6x+37=85 subtract 37 from each side
6x+37-37=85-37
6x=48
x=8---first number
x+7=8+7=15 second number
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8+15+62=85
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27/15 = 1.8

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1 million + 1 million

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Step-by-step explanation:

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ace bike rentals rents bikes for $28 per day. Renters can keep the bike for 8 hours. Bart's bikes rents bikes for $30 per day. R

lyudmila [28]

Bart company charges a lower rate. It is lower by rate $ 0.5 per hour

<h3><u>Solution:</u></h3>

Given that Ace bike rentals rents bikes for $28 per day. Renters can keep the bike for 8 hours

Also given that Bart's bikes rents bikes for $30 per day. Renters can keep the bike for 10 hours

To find: company that charges lower rate

Let us find the hourly rate of Ace and Bart

$\text {hourly rate }=\frac{\text { Rental price }}{\text { total time in a day }}$

<em><u>Hourly rate of Ace company:</u></em>

Rental price = $28

total time in a day 8 hours

$\text {hourly rate }=\frac{28}{8}=3.5$

So the hourly rate of Ace company is $ 3.5 per hour

<em><u>Hourly rate of Bart company:</u></em>

Rental price = $ 30

total time in a day 10 hours

$\text {hourly rate }=\frac{30}{10}=3$

So the hourly rate of Bart company is $ 3 per hour

<em><u>Comparing hourly rate of both companies</u></em>

Ace company is $ 3.5 per hour

Bart company is $ 3 per hour

Bart company < Ace company

3 < 3.5

Thus bart company charges a lower rate

<h3><em><u>How much lower?</u></em></h3>

hourly rate of Ace company - hourly rate of Bart company = 3.5 - 3 = 0.5

So, it is lower by rate $0.5 per hour

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3 years ago

Find the first three terms of the sequence below. Tn=n2+2n+9

klasskru [66]

$\\ \bull\tt\longrightarrow T_n=n^2+2n+9$

$\\ \bull\tt\longrightarrow T_1=1^2+2(1)+9=1+2+9=12$

$\\ \bull\tt\longrightarrow T_2=2^2+2(2)+9=4+4+9=17$

$\\ \bull\tt\longrightarrow T_3=3^2+2(3)+9=9+6+9=24$

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