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3 years ago

The candy store is having 30% off sell. Emma is going to buy $7.50 worth of candy. How much will she pay after the discount

Mathematics

2 answers:

Angelina_Jolie [31]3 years ago

6 0

Answer:

Emma will pay $5.25

Step-by-step explanation:

In order to find this, we first need to find the amount of the discount. We can do that by taking the overall amount and multiplying it by the percentage decrease.

$7.50 * 30% = $2.25

Now since we know the size of the discount, we can subtract it from the original cost.

$7.50 - $2.25 = $5.25

Aloiza [94]3 years ago

5 0

Answer:

The answer to this is: $5.25

Hope this helps :) and can I have brainliest? please

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I need help with this one

artcher [175]

Answer:

r = I/P*t

Step-by-step explanation:

So I dont know how to explain it but to show you how to do it.

I = Prt

Divide both sides by Pt to get r alone

$\frac{I}{Pt} = r$

Therefore your answer is r = I/P*t

Hopes this help :)

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3 years ago

Evaluate y^2 + 2y for y = 0, 1, and 2. Are the resulting numbers prime or composite.

Elza [17]

Y = 0:
$(0)^2+2(0)=0+0=0$
0 is neither prime nor composite.

y=1:
$(1)^2+2(1)=1+2=3$
3 is a prime number (because only 3 and 1 divide evenly into it)

y = 2:
$(2)^2+2(2)=4+4=8$
8 is a composite number (because multiple different numbers divide evenly into it: 1, 2, 4, and 8)

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3 years ago

How to slice using substitution method

marishachu [46]

Answer:

x=3, y=8; (3,8)

Step-by-step explanation:

To use the substitution method, first solve for a variable.

2x+y=14

2x+y(-2x)=14(-2x)

y=14-2x

Now substitute y in the other equation with 14-2x

5x-2(14-2x)= - 1

Simplify by multiplying inside the parenthesis.

5x-28+4x= - 1

Combine the x values

9x-28= - 1

9x=27

x=3

Now substitute the x value in to solve for y

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3 years ago

Need help with 34 , 35 and 36 . <br> full details pleaseee and thank you :)

Nat2105 [25]

Answer:

34. A negative number multiplied by a positive number will always have a negative product. The right answer should be -8.14.

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3 years ago

Simplify 7^-5/6*7^-7/6

DochEvi [55]

So the rule with multiplying exponents of the same base is $x^m*x^n=x^{m+n}$ . Apply this rule here:

$7^{-\frac{5}{6}}*7^{-\frac{7}{6}}=7^{-\frac{5}{6}+{-\frac{7}{6}}}=7^{-\frac{12}{6}}=7^{-2}$

Next, the rule with converting negative exponents into positive ones is $x^{-m}=\frac{1}{x^m}$ . Apply this rule here:

$7^{-2}=\frac{1}{7^2}=\frac{1}{49}$

<u>Your final answer is 1/49.</u>

So an additional rule when it comes to exponents is $x^{\frac{m}{n}}=\sqrt[n]{x^m}$

In this case, your fractional exponent, x^9/7, would be converted to $\sqrt[7]{x^9}$ . However, I had just realized you can further expand this.

Remember the rule I had mentioned earlier about multiplying exponents of the same base? Well, you can apply it here:

$\sqrt[7]{x^9}=\sqrt[7]{x^7*x^2}=x\sqrt[7]{x^2}$

Your final answer would be $x\sqrt[7]{x^2}$

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3 years ago