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Phoenix [80]
3 years ago
13

6(10+z+3) = pls help with this

Mathematics
2 answers:
tamaranim1 [39]3 years ago
4 0

Answer: z = -13

Step-by-step explanation:

6(10+z+3) =

60 + 6z + 18 =

6z = -60 -18

6z = - 78

z= - 78/6

z = -13

Zielflug [23.3K]3 years ago
4 0

Answer: 13

Step-by-step explanation: 6 x 10, then do 6 x 1z, then 6 x 3.

You get 60 + 6z + 18.

Add your constants. (The numbers without variables)

You’re left with 78 + 6z.

Divide 6z/6, youre left with “z”.

Divide 78/6.

You’re left with z = 13

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Red marble probably currently: 12/32 = 3/8

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8 0
3 years ago
gabriella wants to tile a room with an area of 320 square feet. the width of the room is 4/5 its length. what are the length and
Salsk061 [2.6K]
Assuming the shape of the room is a rectangle :

Area = Width x Length.

Let's call width "w" and length "l" . Now if, the width is 4/5 of the length that means 4/5 times length gives us the width, like this :

w=\frac { 4 }{ 5 } \cdot l

As given in the question, area of the rectangle is 320 square feet. And as I said before area of a rectangle can be found by multiplying its length and width. 

w.l=320

w=\frac { 4 }{ 5 } \cdot l , we can plug w's value in the previous equation to find "l". 

\frac { 4 }{ 5 } \cdot l\cdot l=320\\ \\ \frac { 4 }{ 5 } \cdot { l }^{ 2 }=320\\ \\ { l }^{ 2 }=320\cdot \frac { 5 }{ 4 } \\ \\ { l }^{ 2 }=\frac { 320\cdot 5 }{ 4 } \\ \\ { l }^{ 2 }=\frac { 1600 }{ 4 } \\ \\ { l }^{ 2 }=400\\ \\ \sqrt { { l }^{ 2 } } =\sqrt { 400 } \\ \\ l=20

Let's plug "l"s value in the equation.

w.l=320\quad \Longrightarrow \quad w\cdot 20=320\quad \Longrightarrow \quad w=\frac { 320 }{ 20 } \quad \Longrightarrow \quad w=16

The length is 20 feet and the width is 16 feet.


6 0
3 years ago
Read 2 more answers
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