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alukav5142 [94]
3 years ago
15

Suppose that your mom gives you $20 to go to the school supplies store. there is a 6% sales tax on supplies. you need to buy the

following items:pencils = $1.29notebook binder = $5.99paper = $3.49high-lighter pens = $2.35a. how much will the supplies cost?
b. how much change will you receive?
Mathematics
1 answer:
almond37 [142]3 years ago
8 0
20 times .06. Then you add that to 20. Subtract the total of all the supplies needed from 21.20. That will equal your change. Then subtract 9.37 from 21.20. That will be the cost.  <span />
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Show that the equation x^4/2021 − 2021x^2 − x − 3 = 0 has at least two real roots.
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The roots of an equation are simply the x-intercepts of the equation.

See below for the proof that \mathbf{\frac{x^4}{2021} = 2021x^2 - x - 3 = 0} has at least two real roots

The equation is given as: \mathbf{\frac{x^4}{2021} = 2021x^2 - x - 3 = 0}

There are several ways to show that an equation has real roots, one of these ways is by using graphs.

See attachment for the graph of \mathbf{\frac{x^4}{2021} = 2021x^2 - x - 3 = 0}

Next, we count the x-intercepts of the graph (i.e. the points where the equation crosses the x-axis)

From the attached graph, we can see that \mathbf{\frac{x^4}{2021} = 2021x^2 - x - 3 = 0} crosses the x-axis at approximately <em>-2000 and 2000 </em>between the domain -2500 and 2500

This means that \mathbf{\frac{x^4}{2021} = 2021x^2 - x - 3 = 0} has at least two real roots

Read more about roots of an equation at:

brainly.com/question/12912962

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A livestock vaccine is to be given at the rate of 2 milliliters for each 13 pounds of body weight. How much should be given to a
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Look at the picture of a scaffold used to support construction workers. The height of the scaffold can be changed by adjusting t
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1 year ago
What is the cube root of 159?
pochemuha

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-- The number  <em>5.4175</em>  is within  0.00003%  of the actual value.

-- (5.4175)³  is less than  0.000084%  smaller than 159 .


3 0
2 years ago
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A student starts at (0,0) and walks to (12, 0), turns and then walks to (7,12). What is the total distance that this student wal
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