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1 year ago

Find the value of x when y equals -7.2(3x - 7) = 9y

Mathematics

2 answers:

Morgarella [4.7K]1 year ago

8 0

Answer:

not sure but its x=4

Step-by-step explanation:

Ber [7]1 year ago

3 0

Hey there!

2(3x - 7) = 9y

2(3x - 7) = 9(-7)

2(3x - 7) = -63

2(3x) + 2(-7) = -63

6x - 14 = -63

ADD 14 to BOTH SIDES

6x - 14 + 13 = -63 + 13

SIMPLIFY IT!
6x = -63 + 13

6x = -49

DIVISION 6 to BOTH SIDES

6x/6 = -49/6

SIMPLIFY!
x = -49/6

x = -8 1/6

Therefore, the answer should be:

x = -8 1/6 (or x = -49/6 [EITHER OF THOSE SHOULD BE YOUR RESULT BECAUSE THEY ARE BOTH EQUAL TO EACH OTHER])

Good luck on your assignment & enjoy your day!

~Amphitrite1040:)

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2 years ago

In triangle abc, AC=15 BC=11 and m

Oksana_A [137]

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Step-by-step explanation:

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3 0

3 years ago

A half-acre building lot is five times as long as it is wide. What are its dimensions?

Gnoma [55]

we know that

A half-acre is equal to----------> $2,023.43\ m^{2}$

Let

x---------> the length side of the building lot

y--------> the width side of the building lot

A------> Area of the building lot

x=5y-------> equation 1

$A=2,023.43\ m^{2}$

$A=x*y$

$2,023.43=x*y$ --------> equation 2

substitute equation 1 in equation 2

$2,023.43=[5y]*y$

$5y^{2}= 2,023.43\\y^{2}= 404.686\\y= 20.11\ m$

<u>Find the value of x</u>

$x=5y---> x=5*20.11--> x=100.55 m$

therefore

<u>the answer is</u>

the dimensions of the building lot are 100.55 m* 20.11 m

6 0

2 years ago

−7/2÷7/5 i do not get it PLZ HELP!!! ASAP

yulyashka [42]

Okay, to start, when dividing fractions, one thing I use is to flip the numerator and denominator of the divisor and change the division sign to a multiplication sign so it would look like this:
-7/2*5/7
Then, you would multiply straight across and you would get -35/14 which simplifies to -5/2.

4 0

2 years ago

)Maxine spent 15 hours doing her homework last week. This week she spent 18 hours doing homework. She says that she spent 120% m

Vlad1618 [11]

Answer:

No she isnt

Step-by-step explanation:

12.5% is for a hour, so if Maxine did 3 hours more than that would be (12.5x 3 ) 37.5%

4 0

2 years ago

Find the value of x when y equals -7.2(3x - 7) = 9y​

Find the value of x when y equals -7.2(3x - 7) = 9y