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Mekhanik [1.2K]
2 years ago
15

) A store is having a 30% off sale. Michelle uses the expression 0.7p and Stuart uses the expression p-0.3p. Who is using the co

rrect expression?
Mathematics
1 answer:
Aleonysh [2.5K]2 years ago
3 0

Answer:michelle

Step-by-step explanation: it is 70% of the cost since it’s 30% of the original

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Solve for x: 4x(3y-2)=7x+11
kupik [55]

Answer:

x=11(12y-15)

Step-by-step explanation:

4x(3y-2)=7x+11

12xy-8x=7x+11

12xy-8x-7x=11

12xy-15x=11

x(12y-15)=11

x(12y-15)/(12y-15)=11/(12y-15)

x=11/(12y-15)

7 0
3 years ago
Read 2 more answers
Using like terms simplify-k+2(-2k-5)
MrRa [10]

Answer:

-5k-10

Step-by-step explanation:

- k + 2 (- 2k - 5) = - k - 4k - 10 = - 5k - 10

5 0
3 years ago
Solve the following system of equations<br>2x – 3y = 6<br>4x+2y=4​
FinnZ [79.3K]

Answer:

\boxed{(\frac{3}{2} ,-1)}

Step-by-step explanation:

\left \{ {{2x-3y=6} \atop {4x+2y=4}} \right.

It seems this system of equations would be solved easier using the elimination method (the x and y values are lined up).

Multiply everything in the first equation by -2 (we want the 4x to be able to cancel out with a -4x).

2x-3y=6 \rightarrow -4x+6y=-12

Now line up the equations (they are already lined up - convenient) and add them from top to bottom.

\left \{ {{-4x+6y=-12} \atop {4x+2y=4}} \right.

The -4x and 4x are opposites, so they cancel out.

Adding 6y and 2y gives you 8y, and adding -12 and 4 gives you -8.

8y=-8

Divide both sides by 8.

y=-1

Since you have the y-value you can substitute this in to the second (or first equation, it doesn't necessarily matter) equation.

4x +2(-1)=4

Simplify.

4x -2=4

Add 2 to both sides.

4x=6

Divide both sides by 4.

x=\frac{6}{4} \rightarrow\frac{3}{2}

The final answer is x=\frac{3}{2} ,~y=-1.

(\frac{3}{2} ,-1)

5 0
3 years ago
Write an expression that represents the product of a variable and a negative number
lbvjy [14]
-6x because this expression represents the product of a negative number (-6) and a variable (x).
4 0
3 years ago
An HP printer costs $180, with printing costs of $0.03 per page. A Samsung printer costs $230, with printing costs of $0.01 per
Softa [21]

Answer:

2,500 pages

Step-by-step explanation:

Let

y -----> the overall cost

x -----> the number of pages

we know that

HP printer

y=0.03x+180 ------> equation A

Samsung printer

y=0.01x+230 -----> equation B

Solve the system by substitution

Substitute equation B in equation A

0.03x+180=0.01x+230

Solve for x

0.03x-0.01x=230-180\\0.02x=50\\x=2,500\ pages

8 0
2 years ago
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