Today each cookie costs $0.75 less than the normal price. Right now if you buy 7 of them it will only cost you $2.80. Find the normal price of each cookie.

Answers

Answer 1

Answer: The normal price would be 79 cents, and I can tell you why.First, you divide 2.80 by 7, and you get 0.4, but that's crazy! Why would a cookie cost 4 cents!? So, you have to add the 75 cents, the sale. The answer is 79 cents. Hope I helped! :D

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Eight times the square of a positive integer divided by two equals 144 minus 36 times the positive integer. Find the unknown positive integer.

Answers

The correct answer for the question that is being presented above is this one: "The unknown positive integers are 3 and -12."

Eight times the square of a positive integer divided by two equals 144 minus 36 times the positive integer.

8 * x^2 / 2 = 144 - 36x
4*x^2 = 144 - 36 x
x^2 = 36 - 9x
x^2 + 9x - 36 = 0
(x - 3) (x + 12) = 0

x - 3 = 0
x = 3

x + 12 = 0
x = -12

Use differentials to find an approximate value for $\sqrt[3]{65}$

Answers

: Let y = f(x) = x^1/3
Then dy = 1/3*x^(−2/3) dx
Since f(64) = 4.
We take x = 64 and dx = ∆x = 1
This gives dy = 1/3*(64)^(−2/3)* (1) = 1/48
∴65^(1/3) = f(64 + 1) ≈ f(64) + dy = 4 + 1/48 ≈ 4.021

Answer:

: Let y = f(x) = x^1/3

Then dy = 1/3*x^(−2/3) dx

Since f(64) = 4.

We take x = 64 and dx = ∆x = 1

This gives dy = 1/3*(64)^(−2/3)* (1) = 1/48

∴65^(1/3) = f(64 + 1) ≈ f(64) + dy = 4 + 1/48 ≈ 4.021

Read more on Brainly.com - brainly.com/question/19668#readmore

Step-by-step explanation:

Looking for some furniture for her new apartment, Susan visits the local swap meet in search of something cheap. Knowing that most swap meet vendors willnot accept credit cards and that she will not have any money until her next payday, Susan decides to take out a $200 cash advance on her credit card at an interest rate of 32%. If Susan had no previous balance on her credit card, and she manages to pay off the balance within 1 month, how much will she have to pay in interest?

Answers

Given:
cash advance = 200
interest rate = 32% , I'm assuming this is a per annum rate.
pay w/in a month.

I = 200 * 32% * 1/12
I = 5.33

She will have to pay 5.33 in interest after 1 month.

Rhian sat a Maths test and an English test. In the Maths test she scored 14/17. In the English test she scored 31/39

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MATH- 14x100/17= 82.3%
LA- 31x100/39 = 79%

82.3%>79%
She did better in the math class.

what is the question?

Negative 12 minus 4

Answers

-12-4
Subtracting negative numbers is like adding the opposite.
s0 -12+-4, that equals. -16

-12-4 = -12 + -4
-12-4 = -16

A 1400 sq ft house is advertised for sale at a price of $125,000. What is the cost per square foot?

Answers

The answer is $89.28.

Let's use the proportion for this:
If 1400 ft² costs $125,000, 1 ft² will cost x:
1400 ft² : $125,000 = 1 ft² : x

Now, crossing the products:
x · 1400 ft² = $125,000 · 1 ft²
x · 1400 = $125,000
x = $125,000 ÷ 1400
x = $89.28

Therefore, 1 square foot costs $89.28.

If you would like to know the cost per square foot, you can calculate this using the following steps:

1400 sq ft house ... $125,000
1 sq ft ... $x = ?

1400 * x = 125,000 * 1
1400 * x = 125,000
x = 125,000 / 1400
x = $89.29

The correct result would be $89.29.

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