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mihalych1998 [28]
3 years ago
14

Explain how to solve the linear system using the elimination method.

Mathematics
1 answer:
Alik [6]3 years ago
6 0
EQUATION 1)    2x - 3y = -4
EQUATION 2)    7x + 9y =- 5

Multiply the whole first equation by 3 so that we could find the values of X first.

1)   3(2x - 3y = -4)

1)   6x-9y=-12
2)   7x+9y=-5

Add the 2 equations together.
13x=-17
x=-17/3  OR -5 2/3

2x-3y=-4

Plug the value of X into the equation.

2(-17/3) -3y=-4

-11 1/3 - 3y=-4

-3y=-4+11 1/3

-3y=22/3

y=-22/9 OR -2 4/9

~Hope I helped!~






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A company plans to enclose three parallel rectangular areas for sorting returned goods. The three areas are within one large rec
Svetlanka [38]

Answer:

The largest total area that can be enclosed will be a square of length 272 yards.

Step-by-step explanation:

First we get the perimeter of the large rectangular enclosure.

Perimeter of a rectangle =2(l + w)

Perimeter of the large rectangular enclosure= 1088 yard

Therefore:

2(L+W)=1088

The region inside the fence is the area

Area: A = LW

We need to solve the perimeter formula for either the length or width.

2L+ 2W= 1088 yd

2W= 1088– 2L

W = \frac{1088-2L}{2}

W = 544–L

Now substitute W = 544–L into the area formula

A = LW

A = L(544 – L)

A = 544L–L²

Since A is a quadratic expression, we re-write the expression with the exponents in descending order.

A = –L²+544L

Next, we look for the value of the x coordinate

L= -\frac{b}{2a}

L= -\frac{544}{2X-1}

L=272 yards

Plugging L=272 yards into the calculation for area:

A = –L²+544L

A(272)=-272²+544(272)

=73984 square yards

Thus the largest area that could be encompassed would be a square where each side has a length of 272 yards and a width of:

W = 544 – L

= 544 – 272

= 272 yards

7 0
3 years ago
Write the equation of the line in slope-intercept form that passes through the points (-3,3) and (3,-9). ​
tensa zangetsu [6.8K]

Answer:

m = -2

Step-by-step explanation:

y = -2x - 3

3 0
3 years ago
Which expression is equivalent to 15 - 5x? select all that apply
m_a_m_a [10]
Choices A and B are correct. To find the equivalent expressions, you would do the distributive property for the choices to
get rid of the parentheses. You would then see which choices match up with 15 - 5x. Hope this helps!
A.) -5x + 15 (yes)
B.) 15 - 5x (yes)
C.) -15 + 5x (no)
D.) 5 - x (no)
3 0
3 years ago
Help pls ill mark brainliest
Naily [24]

Answer:

A. 2,310 sq ft

Step-by-step explanation:

<u>R</u><u>e</u><u>c</u><u>t</u><u>e</u><u>n</u><u>g</u><u>l</u><u>e</u><u> </u><u>b</u><u>e</u><u>l</u><u>o</u><u>w</u><u>:</u>

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<u>Rectangle Above</u><u>:</u>

  • A = l × b
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<u>A</u><u>r</u><u>e</u><u>a</u><u> </u><u>o</u><u>f</u><u> </u><u>t</u><u>h</u><u>e</u><u> </u><u>P</u><u>l</u><u>a</u><u>y</u><u>g</u><u>r</u><u>o</u><u>u</u><u>n</u><u>d</u><u>:</u>

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3 0
2 years ago
1/3x = 6 what is the letter x
Cloud [144]

Answer:

18

Step-by-step explanation:

Solve for  x  by simplifying both sides of the equation, then isolating the variable.

6 0
3 years ago
Read 2 more answers
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