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2 years ago

Subtract. (−9.6x+7)−(7.3x−9) Enter your answer, in simplified form, in the box.Can somebody help me with this equation?

Mathematics

2 answers:

ZanzabumX [31]2 years ago

8 0

-16.9x + 16 is the correct answer. You have to remove the parentheses, collect the like terms, and then simplify.

Basile [38]2 years ago

5 0

The given expression is $(-9.6x+7)-(7.3x-9)$ .

Remove the parentheses, collect the like terms, and then simplify.

$(-9.6x+7)-(7.3x-9)=(-9.6x-7.3x)+(7+9)\\ (-9.6x+7)-(7.3x-9)=-16.9x+16$ .

So the final simplified form is $-16.9x+16$ .

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Find the percent of discountOriginal price Sale Price<br> $60 <br> % $45

qwelly [4]

Answer:

25% Discount

Step-by-step explanation:

find the percent of discountOriginal price Sale Price

$60

% $45 =

$60 was the SP

$45 is the MP

discount = 60/45 * 100 = 75

100 - 75 = 25%

8 0

2 years ago

Jane must get at least three of the four problems on the exam correct to get an A. She has been able to do 80% of the problems o

NISA [10]

Answer:

a) There is n 81.92% probability that she gets an A.

b) If she gets the first problem correct, there is an 89.6% probability that she gets an A.

Step-by-step explanation:

For each question, there are only two possible outcomes. Either the answer is correct, or it is not. This means that we can solve this problem using binomial distribution probability concepts.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.\pi^{x}.(1-\pi)^{n-x}$

In which $C_{n,x}$ is the number of different combinatios of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And $\pi$ is the probability of X happening.

For this problem, we have that:

The probability she gets any problem correct is 0.8, so $\pi = 0.8$ .

(a) What is the probability she gets an A?

There are four problems, so $n = 4$

Jane must get at least three of the four problems on the exam correct to get an A.

So, we need to find $P(X \geq 3)$

$P(X \geq 3) = P(X = 3) + P(X = 4)$

$P(X = x) = C_{n,x}.\pi^{x}.(1-\pi)^{n-x}$

$P(X = 3) = C_{4,3}.(0.80)^{3}.(0.2)^{1} = 0.4096$

$P(X = 4) = C_{4,4}.(0.80)^{4}.(0.2)^{0} = 0.4096$

$P(X \geq 3) = P(X = 3) + P(X = 4) = 2*0.4096 = 0.8192$

There is n 81.92% probability that she gets an A.

(b) If she gets the first problem correct, what is the probability she gets an A?

Now, there are only 3 problems left, so $n = 3$

To get an A, she must get at least 2 of them right, since one(the first one) she has already got it correct.

So, we need to find $P(X \geq 2)$

$P(X \geq 3) = P(X = 2) + P(X = 3)$

$P(X = 2) = C_{3,2}.(0.80)^{2}.(0.2)^{1} = 0.384$

$P(X = 4) = C_{3,3}.(0.80)^{3}.(0.2)^{0} = 0.512$

$P(X \geq 3) = P(X = 2) + P(X = 3) = 0.384 + 0.512 = 0.896$

If she gets the first problem correct, there is an 89.6% probability that she gets an A.

3 0

3 years ago

Several members at a gym were asked how many minutes they worked out at the gym that day as well as how many calories they burne

n200080 [17]

Answer:

your welcome

Step-by-step explanation:

he said thank you

4 0

3 years ago

Henry has a 12 m wire. He cuts 12.5% of the wire. How long is the wire that Henry cut?

Korvikt [17]

10ml would be the answer to this question

7 0

3 years ago

The number of hours you study for an exam affects your grade. What is a reasonable value of the range?

Gwar [14]

Answer:

Step-by-step explanation:

The range is the grade. Domain is the amount of hours that you study for.

8 0

2 years ago

Read 2 more answers