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4 years ago

Will give many points! PLEASE HELP!

Mathematics

2 answers:

kupik [55]4 years ago

4 0

Answer:

x = 4.8

Step-by-step explanation:

PQRST is just a dilation of ABCDE, so you can take two similar sides that have a measurement from each figure and divide them. Then, take this number (1.6), and multiply it by the similar side of TP (EA) to find x.

nataly862011 [7]4 years ago

3 0

Answer:

24/5 (4.8)

Step-by-step explanation:

5:8 = 3:x

Divide both sides by 3

5:24 = 1:x

That means 24/5 = x

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Jackie has $33, and needs to get a taxi. The cost for a taxi is a fee of $5, plus $7 per mile. Which inequality would help Jacki

Rus_ich [418]

Answer:

$5 + 7x \le 33$

Step-by-step explanation:

Given

$Base\ Charge = 5$

$Additional = 7$ per mile

$Total = 33$

Required

Determine the inequality

First, we need to determine the total cost for x miles.

$Cost = Base\ Charge + Additional * x$

$Cost = 5 + 7 * x$

$Cost = 5 + 7x$

The total cost can not exceed the amount he has, so the inequality is:

$Cost \le Total$

$5 + 7x \le 33$

3 0

3 years ago

URGENT 50 POINTS WILL MARK BRAINLIEST HELP Mary plans to put carpeting in her house.

fredd [130]

Answer:

225 ft^2

please give branliest if you do so please

Step-by-step explanation:

(12*10)+(5*5)+(8*10)

120+25+50

225

7 0

3 years ago

Read 2 more answers

Please answer asap. giving brainliest to correct answer.

nadya68 [22]

Answer:

C.because i calculate it d is the correct answer

Step-by-step explanation:

7 0

3 years ago

You purchase a stereo system for $830. The value of the stereo system decreases 13% each year. a. Write an exponential decay mod

lorasvet [3.4K]

Answer:

a. $y=830*(0.87)^x$

b. The value of stereo system after 2 years will be $628.23.

c. After approximately 4.98 years the stereo will be worth half the original value.

Step-by-step explanation:

Let x be the number of years.

We have been given that you purchased a stereo system for $830. The value of the stereo system decreases 13% each year.

a. Since we know that an exponential function is in form: $y=a*b^x$ , where,

a = Initial value,

b = For decay b is in form (1-r), where r is rate in decimal form.

Let us convert our given rate in decimal form.

$13\%=\frac{13}{100}=0.13$

Upon substituting our given values in exponential decay function we will get

$y=830*(1-0.13)^x$

$y=830*(0.87)^x$

Therefore, the exponential model $y=830*(0.87)^x$ represents the value of the stereo system in terms of the number of years since the purchase.

b. To find the value of stereo system after 2 years we will substitute x=2 in our model.

$y=830*(0.87)^2$

$y=830*0.7569$

$y=628.227\approx 628.23$

Therefore, the value of stereo system after 2 years will be $628.23.

c. The half of the original price will be $\frac{830}{2}=415$ .

Let us substitute y=415 in our model to find the time it will take the stereo to be worth half the original value.

$415=830*(0.87)^x$

Upon dividing both sides of our equation by 830 we will get,

$\frac{415}{830}=\frac{830*(0.87)^x}{830}$

$0.5=0.87^x$

Let us take natural log of both sides of our equation.

$ln(0.5)=ln(0.87^x)$

Using natural log property $ln(a^b)=b*ln(a)$ we will get,

$ln(0.5)=x*ln(0.87)$

$\frac{ln(0.5)}{ln(0.87)}=\frac{x*ln(0.87)}{ln(0.87)}$

$\frac{ln(0.5)}{ln(0.87)}=x$

$\frac{-0.6931471805599}{-0.139262067}=x$

$x=4.977286\approx 4.98$

Therefore, after approximately 4.98 years the stereo will be worth half the original value.

5 0

3 years ago

Please answer this question.

kobusy [5.1K]

Answer:

its i think the first one and the last one

Step-by-step explanation:

sorry if its wrong but i think it is right

5 0

3 years ago