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3 years ago

Evaluate expression an the property used of (8-8)+21

Mathematics

1 answer:

Setler [38]3 years ago

6 0

The answer is 21 because you do PEMDAS first. (8-8) is 0. And 0+21 is 21

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Nancy bought 5 1/2 pounds of apples and oranges. If she bought 1 2/3 pounds of apples, which of the following equations could be

poizon [28]

Answer:

5 1/2-p=1 2/3

Step-by-step explanation:

let p represent the weight of the oranges!

6 0

3 years ago

I NEED HELP WITH THIS HELP PLS!!!!

motikmotik

Answer:

120

Step-by-step explanation:

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4 0

3 years ago

E = mc2.

STALIN [3.7K]

#Equation of m?

<h3>Equation</h3>

m = E/c²

E = mc²

E : c² = m

E/c² = m

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8 0

3 years ago

A company manufactures and sells x television sets per month. The monthly cost and price-demand equations are C(x)=72,000+60x

myrzilka [38]

Answer:

Step-by-step explanation:

Given

Cost Price $c(x)=72000+60x$

Price $p(x)=300-\frac{x}{20}$

Revenue generated $R(x)=P(x)\times x$

where x=no of units

$R(x)=300x-\frac{x^2}{20}$

To get maxima and minima differentiate R(x)

$\frac{\mathrm{d} R(x)}{\mathrm{d} x}=0$

$\frac{\mathrm{d} R(x)}{\mathrm{d} x}=300-2\times \frac{x}{20}=0$

$300=2\times \frac{x}{20}$

$x=3000$

maximum Revenue $R(x)=(300-\frac{300}{20})\times 300=4,50,000$

(b)Profit=Revenue - cost

$Profit=xp(x)-c(x)$

$Profit=300x-\frac{x^2}{20}-72000-60x$

$Profit(z)=240x-\frac{x^2}{20}-72000$

differentiate Profit to get maximum value

$\frac{\mathrm{d} z}{\mathrm{d} x}=240-2\times \frac{x}{20}$

$x=2400$

maximum Profit $z=2,16,000$

(c)Now company decided to tax the company $ 55 for each set

Profit $(z_1)=xp(x)-c(x)-55x$

$z_1=300x-\frac{x^2}{20}-72000x-60x^2-55x$

$z_1=185x-\frac{x^2}{20}-72,000$

differentiate Profit to get maximum value

$\frac{\mathrm{d} z_1}{\mathrm{d} x}=0$

$\frac{\mathrm{d} z_1}{\mathrm{d} x}=185-\frac{2x}{20}=0$

$x=1850$

$P(z_1\ at\ x=1850)=99125$

company should charge 207.5 $ for each set

6 0

4 years ago

#2 <br> Are the following triangles similar? <br> Please help!!

gladu [14]

Answer:

Yes

Because

$\frac{pn}{kr} = \frac{pt}{kg} = \frac{tn}{gr} = \frac{1}{2}$

Also all angles are equal

7 0

3 years ago

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