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3 years ago

6

Ben's Auto Dealer had a sale on Saturday for its new cars. By 10 a.m. 30% of the new cars had been sold. What decimal represents

the percent of cars that have not been sold by 10 a.m.?

2 answers:

emmasim [6.3K]3 years ago

4 0

Decimal: 0.7 100%-30%=70% 70%=70/100= 0.7

Deffense [45]3 years ago

3 0

.7 cars have not been sold

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Which is a correct first step for solving this equation?<br><br> −3x+2−5x−7=4x+2

In-s [12.5K]

Answer: x = - 7/12

Step-by-step explanation:

-3x + 2 - 5x - 7 = 4x + 2

=> -8x - 5 = 4x + 2

=> -12x = 7

=> x = - 7/12

3 0

2 years ago

The population of cats in a rural neighborhood has declined in the last year by roughly 30%. Residents hypothesize that this is

zvonat [6]

Answer:

Orinal number of cats= 171

Step-by-step explanation:

Giving the following information:

Decrease in population= 30%

Current population= 120

<u>To calculate the original number of cats, we need to use the following formula:</u>

Orinal number of cats= current population / (1 - decrease)

Orinal number of cats= 120 / (1 - 0.3)

Orinal number of cats= 171

8 0

3 years ago

Let the region R be the area enclosed by the function f(x)=ln(x) and g(x)= 1/2x-2. Find the volume of the solid generated when t

Neporo4naja [7]

Answer:

$V=61.66$

Step-by-step explanation:

This problem can be solved by using the expression for the Volume of a solid with the washer method

$V=\pi \int \limit_a^b[R(x)^2-r(x)^2]dx$

where R and r are the functions f and g respectively (f for the upper bound of the region and r for the lower bound).

Before we have to compute the limits of the integral. We can do that by taking f=g, that is

$f(x)=g(x)\\ln(x)=\frac{1}{2}x-2$

there are two point of intersection (that have been calculated with a software program as Wolfram alpha, because there is no way to solve analiticaly)

x1=0.14

x2=8.21

and because the revolution is around y=-5 we have

$R=ln(x)-(-5)\\r=\frac{1}{2}x-2-(-5)\\$

and by replacing in the integral we have

$V=\pi \int \limit_{x1}^{x2}[(lnx+5)^2-(\frac{1}{2}x+3)^2]dx\\$

$V=\pi [28x+\frac{1}{x}+xln^2x-12xlnx-6lnx]$

and by evaluating in the limits we have

$V=61.66$

Hope this helps

regards

3 0

3 years ago

if Chelsea has 11 times as many art. Brushes and they have 60 art brushes altogether how many brushes does Chelsea have

scoundrel [369]

<span>t's call P the number of art brushes that Monique has. Chelsea has 11xP (that is 11 times as many as Monique) Together they have: P + 11xP = 12xP That means 12xP = 60 (60 is the number of art brushes they have together) In order to find how much is P, we need to divide: 60 Ă· 12 = 5 brushes P = 5 ; that means has Monique 5 art brushes. Chelsea has 11 times as many art brushes as Monique: 11 x 5 = 55 brushes</span>

8 0

3 years ago

Can someone help me? It’s the factory one

alekssr [168]

3.21 it should be at least

3 0

3 years ago

Read 2 more answers