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lana66690 [7]
3 years ago
7

HELP !!! Use the elimination method to solve the system of equations.

Mathematics
2 answers:
SCORPION-xisa [38]3 years ago
5 0

Answer:

C. (5, -3)

Step-by-step explanation:

Rewrite the first equation.

Multiply the second equation by 3 and write it under the first equation.

4x + 3y = 11

3x - 3y = 24

Now add the equations.

7x        = 35

Divide both sides by 7.

x = 5

Substitute 5 for x in the original first equation:

4(5) + 3y = 11

20 + 3y = 11

3y = -9

y = -3

Solution: (5, -3)

Dafna1 [17]3 years ago
3 0

Answer:

C. (5, -3)

Step-by-step explanation:

4x + 3y = 11

x - y = 8  (multiply by 3) --> 3x - 3y = 24


4x + 3y = 11

3x - 3y = 24

---------------------add

7x = 35

 x = 5


5 - y = 8

y = 5 - 8

y = -3

(5, -3)


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8 0
3 years ago
30 points Given (-3, 1) and (3,-3). The slope of the line is ____________ . The equation of the line is _____________.
Liono4ka [1.6K]

Answer:

y = (3/2)x + 11/2

Step-by-step explanation:

As we move from the point (-3, 1) to the point (3, -3), x increases by 6 and y decreases by 4.  Thus, the slope is

m = rise / run = 6/4 = 3/2.

Subbing the knowns into the general point-slope form of the equation of a straight line, we get

y - 1 = (3/2)(x - [-3]), or y - 1 = (3/2)(x + 3).

This is equivalent to y = (3/2)x + 9/2 + 1, or y = (3/2)x + 11/2.


8 0
3 years ago
Read 2 more answers
Evaluate the expression when x = 4 and y=-5.<br> -5y+x
Maru [420]

Answer:

29

Step-by-step explanation:

<u>Step 1:  Set x to 4 and set y to -5</u>

<u />-5y + x

-5(-5) + (4)

25 + 4

29

Answer:  29

8 0
3 years ago
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Use the distributive property to find the value of x.
noname [10]

Answer:

The value of x = 1.5

Step-by-step explanation:

Given:

-1.2(3 – x) = -1.8

To Find:

x = ?

Solution:

Distributive property:

The distributive property lets you multiply a sum by multiplying each addend separately and then add the products.

For example A(B + C) = A×B + A×C

Here we have,

-1.2(3 – x) = -1.8

Applying Distributive property we get ,

-1.2×3 -1.2×-x = -1.8

∴ -3.6 +1.2x = -1.8

∴ 1.2x =3.6-1.8\\\\1.2x=1.8\\\\x=\frac{1.8}{1.2} \\\textrm{multiply numerator and denominator by 10}\\x=\frac{1.8\times 10}{1.2\times 10}\\ \\x=\frac{18}{12} \\\\\\x= 1.5

∴ x = 1.5

8 0
3 years ago
Read 2 more answers
describe how to find the price of a blender 3 years from now the inflation is constant at 4% and the the blender costs 38$ today
Ludmilka [50]
FV =  PV / (1 +r)^n

Where FV = Future Value,  PV = Present Value, r = inflation rate in %,
n = number of years.

PV = $38, r = 4%, n = 3 years.

FV =    38 / (1 + 4%)^3

      =   38 / (1 + 0.04)^3

      =     38 / (1.04)^3 =    33.782

Hence the value 3 years from now = $33.78    
5 0
3 years ago
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