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statuscvo [17]
3 years ago
5

Emily saved $11 to go to the candy stor. After buying 10 jawbreakers, she had 5.80. How much did each jawbreaker cost including

tax?
Mathematics
1 answer:
Grace [21]3 years ago
8 0

Answer:

Step-by-step explanation:

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Evaluate the expression using a calculator:
tester [92]

The value of the expression is 0.0265. Using exponents and power rules, the required value is calculated.

<h3>What are the exponent and power rules?</h3>

The important exponent and power rules are:

  • a⁻ⁿ = 1/aⁿ; negative exponent
  • (ab)ⁿ = aⁿ × bⁿ; power of a product rule
  • aⁿ × aˣ = aⁿ⁺ˣ; multiplication rule
  • aⁿ/aˣ = aⁿ⁻ˣ; division rule
  • a^{\frac{x}{y} } = \sqrt[y]{a^x}; fractional exponent

<h3>Calculation:</h3>

The given expression is 126^{-3/4}

Using calculator: 126^{-3/4} = 0.0265

Applying the exponent rule for evaluating the given expression:

126^{-3/4}

Applying the negative power rule;

I.e., a⁻ⁿ = 1/aⁿ

⇒ 126^{-3/4}=\frac{1}{126^{3/4}}

Applying fractional exponent rule;

I.e., a^{\frac{x}{y} } = \sqrt[y]{a^x}

⇒ \frac{1}{126^{3/4}}=\frac{1}{\sqrt[4]{126^3} }

⇒ 1/\sqrt[4]{2000376}

⇒ 1/37.6077

⇒ 0.0265

Therefore, the value of the given expression is 0.0265.

Learn more about exponent rules here:

brainly.com/question/11975096

#SPJ1

4 0
1 year ago
Which are solutions to the following equation? x^2=21
creativ13 [48]

Answer:

x

=

±

√

21

Explanation:

To find

x

2

you have to find the square root of

21  x = ± √ 21 ≈ ± 4.5286

Step-by-step explanation:

4 0
3 years ago
Can someone help me solve D, a, or/and b
Margaret [11]

Answer:

slop = (175 - 125) \div (2 - 1) = 50 \\ y - 125 = 50 \times (x - 1) \\ y = 50x - 50 + 125 \\ y = 50x + 75

you can solve problems by this equation

4 0
3 years ago
What is the solution set of y = x2 2x 7 and y = x 7
Anna71 [15]
Hello,

y=x²+2x+7
y=x+7

==>x²+2x+7=x+7
==>x²+x=0
==>x(x+1)=0
==>(x=0 and y=7) or (x=-1 and y=-1+7=6)

Sol={(0,7),(-1,6)}

8 0
3 years ago
Read 2 more answers
macey bought 11 apple pies at the bakery. she wants to give each of her 4 friends equal amounts of pie how much will each friend
just olya [345]

Answer:

each friend would get 2 3/4

Step-by-step explanation:

11/4

8 0
3 years ago
Read 2 more answers
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