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diamong [38]
3 years ago
6

Part A (4 points): Tonya selected a pair of shoes for the regular price of $80. How much money will she save by using the 20% of

f coupon? Justify your answer using equations, models, and/or words to explain your mathematical reasoning.
Mathematics
2 answers:
Lelu [443]3 years ago
7 0
<span>Since ten percent of 80 is 8 dollars, you can simply multiply 8x2, and arrive at the correct discount value of 16 dollars. Subtract 16 from 80 and arrive at the final price of $64.00</span>
Ymorist [56]3 years ago
6 0
The answer is 20% = .20
$80 x .2 = $16
$80-$16 = $64
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3 years ago
Use a separate sheet of paper to solve the system of inequalities by graphing. Use the graph to decide if the point (1, –1) is i
Lena [83]

Answer:

The answer is no though, the point (1,-1) is below both.

Step-by-step explanation:

So the two inequalities are y≤-3x+3 and 3x+8y≥3

With inequalities you have to know a few things.  First, when you graph you may have to use non solid lines.  for instance, if you had x<5, 5 would not be part of the answer because it is only answers less than 5.  so you represent this by making a dashed line that says "you cannot include values on this line".  Second, with algebra, if you multiply both sides by a negative it flips the inequality.  for instance -y > 54 you would multiply (or divide) by -1 and it would change to y < -54.  Third, when graphing an inequality, treat it like an equation and graph the line as if it were said equation(with solid or dashed lines as needed)  then, if it is y > f(x) you shade in the section above the line and y < f(x) shades in below.  The shaded part is your answer basically.  Now lets get into yours.

y≤-3x+3

It is already in the form y = f(x)  so grapht he line 3x + 3 with a solid line since it is y is less than or equal to,  then shade below that line.  

3x+8y≥3

First get it so y is by itself

3x+8y≥3

8y≥3 - 3x

y ≥ 3/8 - 3/8 x

Now grapht his line  with a solid line and shade the area above it.

Now, the shaded area below between y ≥ 3/8 - 3/8 x and  y≤-3x+3 and the lines are your answer, so you need to check if the point (1, -1) is in this shared shaded area or on one of the lines.

The answer is no though, the point (1,-1) is below both.

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3 years ago
Help me find the answer!! 2-step equation
Vladimir79 [104]

\looparrowright \sf3\leqslant \dfrac{y}{ - 5}  + 7

\looparrowright \sf3 - 7\leqslant \dfrac{y}{ - 5}

\looparrowright \sf - 4\leqslant \dfrac{y}{ - 5}

\looparrowright \sf - 4 \times  - 5\leqslant {y}

\looparrowright \sf 20\leqslant {y}

8 0
2 years ago
I need help with these questions for Quadratic functions
STALIN [3.7K]

9514 1404 393

Explanation:

1. The general form of a quadratic in standard form* is ...

  f(x)=ax^2+bx+c

An example is ...

  f(x)=2x^2+3x-5

The constant c is the y-intercept, so is the easiest bit of information to obtain in this form.

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2. The general form of a quadratic in vertex form can be written as ...

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An example is ...

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The ordered pair (h, k) is the vertex of the parabola, so is easy to obtain in this form. Arguably, it may be easier to identify the line of symmetry, x=h, since that requires looking at only one constant, instead of two.

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* In the UK, "standard form" is vertex form.

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3 years ago
|7-4x|&gt;1 como se resuelve está inecuación con valor absoluto??
Phoenix [80]

Answer:

Step-by-step explanation:

te da x<3/2 y x<2, pero la segunda solucion abarca la primera. Por lo tanto creo q seria x<2

3 0
3 years ago
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