2 years ago

Julies buys 8.2 pounds of pears for $16 ABOUT how much do they cost per pound?

Mathematics

1 answer:

RoseWind [281]2 years ago

4 0

Answer:

$1.95 or 2. According to your refrences.

Step-by-step explanation:

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The real numbers $x$ and $y$ are such that \begin{align*} x + y &= 4, \\ x^2 + y^2 &= 22, \\ x^4 &= y^4 - 176 \sqrt{

tamaranim1 [39]

You get everything you need from factoring the last expression:

$x^4-y^4=-176\sqrt7$

The left side is a difference of squares, and we get another difference of squares upon factoring. We end up with

$x^4-y^4=(x^2-y^2)(x^2+y^2)=(x-y)(x+y)(x^2+y^2)$

Plug in everything you know and solve for $x-y$ :

$-176\sqrt7=(x-y)\cdot4\cdot22\implies x-y=\boxed{-2\sqrt7}$

4 0

3 years ago

Read 2 more answers

Write a number in each of these boxes so that the mode of the five numbers is 11

Salsk061 [2.6K]

Mode is just the most reacurring number so just put 11 in the boxes

7 0

3 years ago

Officer Brimberry wrote 8 tickets for traffic violations last week, but only 7 tickets this week. What is the percent decrease?

g100num [7]

Answer:

68% degree percent

Step-by-step explanation:

68% degree percent

8 0

2 years ago

A store bought a balance beam at a cost of $68 and marked it up 150%. Later on, the store marked it down 70%. What was the disco

Natali5045456 [20]

Balance beam price=68$(100%)
Increase of 150%
Discount of 70%

Price after increase= 68$x(100%+150%)
=68$x250%
=68$x2.5
=170$

Discount price=170$x70%
=170$x0.7
=119$

The discount price is 119$.

5 0

2 years ago

If the variance of the water temperature in a lake is 30°, how many days should the researcher select to measure the temperature

Jet001 [13]

Answer: The number of days would be 7 days.

Step-by-step explanation:

Since we have given that

Variance = 30°

Standard deviation = √30 = 5.47

Mean = 4°

At 95% confidence, z = 1.96

So, number of days that the researcher select to measure the temperature would be

$n=(\dfrac{z\times \sigma}{error})^2\\\\n=(\dfrac{1.96\times 5.42}{4})^2\\\\n=7.053\\\\n=7$

Hence, the number of days would be 7 days.

3 0

3 years ago