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Maru [420]
3 years ago
14

The equation 10x + 5y = 150​

Mathematics
1 answer:
Verdich [7]3 years ago
4 0

Answer:

x = 14.5      y = 1

Step-by-step explanation:

get the x alone by subtracting 5y from both sides

10x + 5y = 150

      - 5y    -5y

10x = -5y + 150

divide both sides by 10

<u>10x</u> = <u>-5y + 150</u>

10            10

x = -0.5y + 15

Now that we've solved for x, we can plug it into the original equation

10 (-0.5y + 15) + 5y = 150

now we solve for y the same way we did x

first distribute 10 into (-0.5y + 15)

-5 + 150 +5y = 150

now we get the y alone

-5 + 150 + 5y = 150

+5  -150            -150 +5

5y = 5

now divide by 5

<u>5y</u> = <u>5</u>

5     5

y = 1

now that we have both x and y, we plug y into our solution for x

x = -0.5y + 15

x = -0.5(1) + 15

x= -0.5 + 15

x = 14.5

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Systems of Equations - Elimination
Novay_Z [31]
First, isolate y in 7x-y=29 because 1 is y's coefficient.
7x-y=29
-y=29-7x
y=7x-29
Now, substitute 7x-29 for y in 7x+8y=20.
7x+8y=20
7x+8(7x-29)=20
7x+56x-232=20
Add all coefficients.
63x-232=20
Isolate x by adding 232 to both sides.
63x-232=20
63x=252
x=4
Now, substitute 4 for x in your first equation.
y=7x-29
y=7(4)-29
y=28-29
y=-1
Your answer would be (4,-1).
Any questions you may have, please contact me or comment.



5 0
3 years ago
Read 2 more answers
At the local outlet of a major grocery store, manager Maria Grimaldi has just authorized the markdown of a dozen large eggs by $
pickupchik [31]

Answer:

The markdown rate is 32.1%

Step-by-step explanation:

We can easily solve this problem by applying a rule of three,

$1.09 a dozen  ----------------------------------  100% of the value

$0.35 a dozen ------------------------------------- x

x = ($0.35/$1.09) * 100%

x = 0.3211 *100%

x = 32.11%

The markdown rate is 32.1%

7 0
3 years ago
How do you write 2x minus 16 in words phares​
Mars2501 [29]

Sixteen is less than twice a number.

7 0
4 years ago
C-9.5÷1.9=-10 what does c equal
svp [43]
C=-15 because first I divided -9.5 and 1.9 and I got -5;
So -15 - (-5) turns into -15 + 5
= -10
5 0
4 years ago
For the given maximization​ problem, (a) determine the number of slack variables​ needed, (b) name​ them, and​ (c) use slack var
sergij07 [2.7K]

Answer:

a) 2

b) s₁    and   s₂

c)  First linear equation:     5*x₁  +  8*x₂ + 10*x₃ + s₁  = 173

   Second linear equation:   5*x₁  + 4*x₂  + 17*x₃  + s₂  = 254

Step-by-step explanation:

The problem statement, establishes two constraints, each one of them will need a slack variable to become a linear equation, so the answer for question

a) 2.

b)  The constraints are: s₁  and  s₂

c) First constraint

5*x₁  +  8*x₂ + 10*x₃ ≤ 173

We add slack variable  s₁   and the inequality becomes

5*x₁  +  8*x₂ + 10*x₃ + s₁  = 173

The second constraint is:

5*x₁  + 4*x₂  + 17*x₃ ≤ 254

We add slack variable  s₂   and the inequality becomes

5*x₁  + 4*x₂  + 17*x₃  + s₂  = 254

7 0
3 years ago
Read 2 more answers
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