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MA_775_DIABLO [31]
2 years ago
10

A brick is in the shape of a rectangular prism with a length of 6 inches, a width of 3 inches, and a height of 5.5 inches. The b

rick has a density of 2.7 grams per cubic centimeter. Find the mass of the brick to the nearest gram.
pls pls pls help
Mathematics
1 answer:
egoroff_w [7]2 years ago
3 0

y............. xnxnxnxnxnccncncncnnncncjcjnf

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PLEASE HELP 20 POINTS<br> solve the system of equations y=-5x-7 and -4x-3y=-1 by substitution.
Ainat [17]

Answer:

Solution: x = -2; y = 3 or (-2, 3)

Step-by-step explanation:

<u>Equation 1:</u>  y = -5x - 7  

<u>Equation 2:</u> -4x - 3y = -1

Substitute the value of y in Equation 1 into the Equation 2:

-4x - 3(-5x - 7)  = -1

-4x +15x + 21 = -1

Combine like terms:

11x + 21 =  - 1

Subtract 21 from both sides:

11x + 21 - 21 =  - 1 - 21

11x = -22

Divide both sides by 11 to solve for x:

11x/11 = -22/11

x = -2

Now that we have the value for x, substitute x = 2 into Equation 2 to solve for y:

-4x - 3y = -1

-4(-2) - 3y = -1

8 - 3y = -1

Subtract 8 from both sides:

8 - 8 - 3y = -1 - 8

-3y = -9

Divide both sides by -3 to solve for y:

-3y/-3 = -9/-3

y = 3

Therefore, the solution to the given systems of linear equations is:

x = -2; y = 3 or (-2, 3)

Please mark my answers as the Brainliest if you find this helpful :)

7 0
3 years ago
Answer all questions please.
Reika [66]
Domain: -∞ ≥ x ≥ ∞
Range: y ≥ 0
This graph shows a function
8 0
2 years ago
Wat is 5/9-1/3<br> Equal to.
Llana [10]
\frac{5}{9}-\frac{1}{3}=\\\frac{5}{9}-\frac{1}{3}*\frac{3}{3}=\\\frac{5}{9}-\frac{3}{9}=\\\frac{2}{9}
7 0
3 years ago
Read 2 more answers
Which of the following represents a valid first step to solving this system of equations using the substitution method?
Phoenix [80]

Answer:

2(2y - 1) - y = 7

Step-by-step explanation:

I guess the 2 equations are

2x - y = 7

x = 2y - 1

substitution message that you use one equation to express one variable by the other, and then you use that in the other equation to get one equation for one variable. then you solve for that, and use that result in the first equation to since for the second variable.

the equations are already defined that way, that the second equation directly defines x as an excision of y.

so, this needs to be used then in the first equation.

and that makes

2(2y - 1) - y = 7

the correct first step.

7 0
2 years ago
Draw a model to represent the following problem 42 divide 7 Answer
hodyreva [135]

We have to draw the model for 42 divide 7 . In order to draw the model we use below steps.

  • Draw 7 boxes to represent 7 groups.
  • Assume 42 as the number which represents the total of these 7 groups.
  • Put a question mark at the first box.

Attached is the model to represents 42 divide 7 .

In the question mark we should put 6. Hence, when we add 6 to 7 times that will be equal to 42.


5 0
3 years ago
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