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valkas [14]
3 years ago
7

Lyla is shopping for school supplies. She has $20.00 to spend. She plans to buy a package of pens for $4.98. She also wants to b

uy a calculator. All calculators are being sold for 30 percent less than the original price. Write an inequality that can be used to find the original price, x, of a calculator Lyla can buy.
Mathematics
2 answers:
kifflom [539]3 years ago
7 0
X divided by 30 because it is going down by 30 percent.. :)
solong [7]3 years ago
3 0

Answer:

<h2>She can effort calculators that costs $21.46 or lower.</h2>

Step-by-step explanation:

We know that Lyla has $20.00 to spend, which is the maximum money she can use. In other words, she cannot spend more than $20.00, it's $20.00 or lower, this means we have to use \leq \$20 in the inequality, that's the restriction.

Now, we know that the package of pens is $4.98, and the calculators cost 30 percent less than the original price, that means they cost 0.70x with discount included.

So, the inequality that models this situation is

\$4.98 + 0.70x \leq \$20

Now, solve for x

\$4.98 + 0.70x \leq \$20\\0.70x \leq 20-4.98\\x\leq \frac{15.02}{0.70}\\ x\leq 21.46

This means that Lyla can by a calculator which original price won't go higher than $21.46. She can effort calculators that costs $21.46 or lower.

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Solve LaTeX: \frac{-x}{3} \:-15 x &gt; − 15 LaTeX: x\: \:-2
Fudgin [204]

Answer:

<h3>The answer is option A</h3>

Step-by-step explanation:

<h3>\frac{  - x}{3}  < 5</h3>

<u>First of all cross multiply</u>

That's

<h3>- x < 5 \times 3 \\  - x < 15</h3>

Next divide both sides by - 1 to make x positive and change the sign from < to >

That's

<h3>\frac{ - x}{ - 1}  <  \frac{ 15}{ - 1}</h3>

We have the final answer as

<h2>x >  - 15</h2>

Hope this helps you

4 0
3 years ago
Danny invests $10,000 in a savings account that pays 3.5% simple interest. If Danny does not make any additional deposits or wit
SashulF [63]

Answer:

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Step-by-step explanation:

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t is the time involved, 7....year(s) time periods.

So, t is 7....year time periods.

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5 0
3 years ago
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Sergio [31]

Answer:

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Step-by-step explanation:

Here we start out finding the z-score corresponding to the bottom 33% of the area under the standard normal curve.  Using the invNorm( function on a basic TI-83 Plus calculator, I found that the z-score associated with the upper end of the bottom 33% is -0.43073.

Next we use the formula for z score to determine the x value representing this woman's heart rate:

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