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1 year ago

Solve for $a$: $3a-7(3-a)=5$. Express your answer as a common fraction in simplest form.

Mathematics

1 answer:

SashulF [63]1 year ago

3 0

Answer:

2.6

Step-by-step explanation:

just put one part of the equation in y1 and the other in y2 and hit 2nd trace 5 an hit enter 4 times

then it will bring a graph hit enter 3 time again and it will show u the answer at the bottom left

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A local shop prints photos. The function f(x) = −x2 + 20x − 75 models the profit from one customer, where x is the number of pho

AnnZ [28]

Answer:

x = 5, x = 15; The zeros represent the number of photos printed to produce a maximum profit.

Step-by-step explanation:

F(x) = −x²+ 20x − 75

Let's f(x)= 0

0= -x²+20x-75

0= x²-20x+75

0=x²-5x-15x+75

0= x(x-5)-15(x-5)

0= (x-5)(x-15)

The zeros are

X= 5 or x = 15

And the xeros represent a number of photos printed to produce maximum profit

7 0

2 years ago

On Wednesday, Danielle skated 2/3 of the way around the track in 2 minutes. Her younger brother skated 3/4 of Danielle's distanc

katen-ka-za [31]

75 percent of 2/3

Is 0.5 of the way

4 0

2 years ago

Tyler is planning to buy a new car. He intends to trade in his existing car, a 2002 Chrysler Sebring in good condition. Using th

alexdok [17]

Answer:

a. $3,260.

Step-by-step explanation:

Tyler is planning to buy a new car. He intends to trade in his existing car, a 2002 Chrysler Sebring in good condition. Using the table below, we need to estimate about how much Tyler’s car is worth.

Given table is

Model/Year 2000 2001 2002 2003 2004

Pacifica $2,194 $2,288 $2,605 $2,690 $2,814

Concorde $1,842 $1,998 $2,180 $2,781 $2,925

Sebring $2,920 $3,075 $3,260 $3,551 $3,912

300M $2,770 $2,934 $3,095 $3,188 $3,676

Given choices are:

a. $3,260

b. $2,920

c. $2,605

d. $3,188

"2002 Chrysler Sebring" means look for the column of table which has year 2002. Then look for the row of the table which says "Sebring". Now we see that both rows and columns intersect at value $3,260.

Hence final answer is a. $3,260.

6 0

2 years ago

Read 2 more answers

A random sample of BYU-Idaho students was surveyed and asked if they were in favor of retaining the penny as a form of currency

castortr0y [4]

Answer:

Step-by-step explanation:

Hello!

The objective is to compare the proportion of male and female students that are in favor of retaining the penny as a form of currency. Two groups of students were surveyed, the study variables are:

X₁: number of female students of the BYU-Idaho out of 116, that are in favor of retaining the penny as a form of currency.

X₂: number of male students of the BYU-Idaho out of 137, that is in favor of retaining the penny as a form of currency.

These two variables are discrete, and they follow the binomial criteria:

The number of observations of the trial is fixed and there are only two possible observations: success: the student is on the favor, failure: the student is against it.

Each observation in the trial is independent, this means that none of the trials will affect the probability of the next trial.

The probability of success in the same from one trial to another.

So we can say that

X₁~Bi(n₁;p₁)

X₂~Bi(n₂;p₂)

To study the difference between both population proportions through a hypothesis test or a Confidence Interval you theed to apply the Central Limit theorem and approximate the distribution of both sample proportions to normal. For that the sample sizes have to be big enough, as a rule, a sample of size greater than or equal to 30 is considered sufficient to apply the theorem and use the approximation.

n₁ and n₂ ≥ 30, in this case, n₁= 116 and n₂=137

So the conditions are meet to estimate the difference per CI and test it through a hypothesis test.

I hope this helps!

8 0

1 year ago

What are the solution(s) to the quadratic equation 50 - x2 = 0?

Pie

Answer:

±5sqrt(2) = x

Step-by-step explanation:

50 - x^2 = 0

Add x^2 to each side

50 - x^2 +x^2= 0+x^2

50 = x^2

Take the square root of each side

±sqrt(50) = sqrt(x^2)

±sqrt(25*2)) = x

±sqrt(25) sqrt(2) = x

±5sqrt(2) = x

3 0

2 years ago