3 years ago

8.4x-5=20.2 solve for x

Mathematics

1 answer:

tresset_1 [31]3 years ago

6 0

Answer:

x=3

Step-by-step explanation:

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PLEASE HELP

miss Akunina [59]

In the smallest of the three triangles (with sides $a,b,3$ ) we have

$a^2+3^2=b^2$

In the second-largest triangle (with sides $a,108$ ), the length of the missing side is $\sqrt{a^2+108^2}$ . Then in the largest triangle (with sides $b,111,\sqrt{a^2+108^2}$ ), we have

$b^2+\left(\sqrt{a^2+108^2}\right)^2=(108+3)^2=111^2$

$\implies b^2+a^2+108^2=111^2$

$\implies b^2+a^2=657$

Equivalently, we have

$(a^2+9)+a^2=657\implies 2a^2=648\implies a^2=324\implies a=18$

In turn, we find

$b^2=18^2+3^2=298\implies b=\sqrt{333}=3\sqrt{37}$

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2 years ago

Terry lives 0.9 kilometers from school. He walks back and forth to school each day. How many kilometers does he walk to and from

julsineya [31]

Answer:

9 kilometers

Step-by-step explanation:

.9 times 2 is 1.8. 1.8 times 5 is 9

8 0

3 years ago

Janet can do a job in three hours while Gary can do the same job in two hours. If Janet works for an hour before Gary be in help

yKpoI14uk [10]

Janet = 1/3

Gary = 1/2

(1/3) + (1/2) = 5/6

Let x = time they both can do the job together

(1/2) + (5/6)x = 1

Solve for x to find your answer.

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3 years ago

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25 points

VMariaS [17]

Answer:

5 and 7

Step-by-step explanation:

because the problem said least two girls meaning substract

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2 years ago

You are paid 82.50 for 71/2 hours of work what is your rate of pay

Inessa [10]

Your rate of pay is $11 per hour

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2 years ago

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