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ladessa [460]
3 years ago
15

Y = 4x-9 y = x-3 Which method and why? Solve, shoving all work

Mathematics
1 answer:
vodomira [7]3 years ago
7 0

Answer:

(2,-1)

Step-by-step explanation:

The ys in both questions are isolated on one side of the equation in both. The numerical coefficient of both is 1. Therefore you should equate the the left side of each equation to the other left side. The solution is the easiest one to solve because there is only 1 unknown on both sides.

4x - 9 = x - 3                      Subtract x from both sides.

4x-x - 9 = -3                       Combine

3x -9 = - 3                          Add 9 to both sides

3x - 9+9 = - 3+9

3x = 6                                Divide by 3

3x/3 = 6/3

x = 2

===============

Now use the second equation to solve for y

y = x - 3

y = 2 - 3

y = -1

==============

The solution is (2,-1)

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The excavation for a house and the trucks to carry away the material have the dimensions shown. About how many level truck loads
Inessa05 [86]

Answer:

<h3>This means that about 21 level truck loads are necessary to remove all dirts.</h3>

Step-by-step explanation:

To get the number of level truck loads needed to remove all the dirts in the house, first we need to calculate volume of the truck and the house.

Volume of truck = Length * Breadth * Height

If the truck is 5.0 for the length 2.0 for the height 3.0 for the side base;

Volume of the truck = 5*2*3

Volume of truck = 30

For the house;

Volume of house = Length * Breadth * Height

If the house is 4.0 for the height 14.5 for the length and 11.0 for the side base, then

Volume of the house = 4*14.5*11 = 638

Number of level truck loads needed to remove all the dirts = Volume of house/Volume of the truck = 638/30 ≈ 21.3

This means that about 21 level truck loads are necessary to remove all dirts.

8 0
3 years ago
What is the area of the triangle below?
Nady [450]

Answer:

36

Step-by-step explanation:

1/2 × b× h

= 1/2 × 9×8

= 9×4

= 36 sq. in

7 0
3 years ago
Work out the third term of the sequence with nth term 3(n+2).<br><br>​
Anon25 [30]

Answer:

Step-by-step explanation:

n = 3

3(n + 2) = 3(3+2) = 3*5 = 15

6 0
3 years ago
Read 2 more answers
Find the value of \mathrm{x}xin the following figure.
Hoochie [10]

Step-by-step explanation:

step 1. I guess we assumed the two lines across the transversal are parallel

step 2. 3x + 1 = 85 (definition of alternate exterior angles)

step 3. 3x = 84 (subtract 1 from each side)

step 4. x = 28. (divide both sides by 3)

3 0
3 years ago
Answer it please and thank you..
Kruka [31]

(-6,2) Is the answer! :)


4 0
3 years ago
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