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2 years ago

Wendy bought 4 bananas and 2 apples for $1.68. James bought 5 bananas and 3 apples for $2.35.

Mathematics

1 answer:

balu736 [363]2 years ago

4 0

Answer:

1st part

Apples = $.17

Bananas = $.50

2nd part

A = 4

B = 2.35

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Select the expressions that are polynomials.

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I believe the first and last one are polynomials. Usually they start with the highest exponent first and then work their way down.

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2 years ago

Why is the answer to this integral's denominator have 1+pi^2

ss7ja [257]

It comes from integrating by parts twice. Let

$I = \displaystyle \int e^n \sin(\pi n) \, dn$

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$\displaystyle \int u \, dv = uv - \int v \, du$

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Notice that the ∫ v du term contains the original integral, so that

$\displaystyle I = e^n \sin(\pi n) - \pi \left(e^n \cos(\pi n) + \pi \int e^n \sin(\pi n) \, dn\right)$

$\displaystyle I = \left(\sin(\pi n) - \pi \cos(\pi n)\right) e^n - \pi^2 I$

$\displaystyle (1 + \pi^2) I = \left(\sin(\pi n) - \pi \cos(\pi n)\right) e^n$

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1 year ago

A set of magical wand prices are normally distributed with a mean of 50 dollars and a standard deviation of 4 dollars. A blackth

Anna11 [10]

Complete Question

A set of magical wand prices are normally distributed with a mean of 50 dollars and a standard deviation of 4 dollars. A blackthorn wand has a price of 45.20. What proportion of wand prices are lower than the price of the blackthorn wand? You may round your answer to four decimal places

Answer:

0.1151

Step-by-step explanation:

We solve using z score formula

z = (x-μ)/σ, where

x is the raw score = $45.20

μ is the population mean = $50

σ is the population standard deviation = $4

We are solving for x < 45.20

Hence:

z = 45.20 - 50/4

z = -1.2

Probability value from Z-Table:

P(x<45.20) = 0.11507

Approximately to 4 decimal places = 0.1151

Therefore, the proportion of wand prices that are lower than the price of the blackthorn wand is 0.1151

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2 years ago

A) The sum of −3x+5 and 7−4x is subtracted from 5x+17.

AlekseyPX

A. -3x+5+7-4x
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-7x+12

-7x+12-5x+17
-7x-5x+12+17
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2 years ago

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madam [21]

Answer: x = 13.5

3/4 = x/18

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Step-by-step explanation:

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2 years ago

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