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3 years ago

J(x) = -43x – 24, find a when j (x) = -12

Mathematics

1 answer:

pishuonlain [190]3 years ago

7 0

Answer:

-540

Step-by-step explanation:

j(12)=-43(12)-24

j(12)=-540

Hope it was helpful to you and others!!!

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In a class of 28 students, 11 have a brother and 9 have a sister. There are 2 students

Westkost [7]

Answer:

$\displaystyle P(A\mid B)=\frac{2}{11}$

Step-by-step explanation:

<u>Conditional Probability</u>

Is a measure of the probability of the occurrence of an event, given that another event has already occurred. If event B has occurred, then the probability that event A occurs is given by:

$P(A\mid B)={\frac {P(A\cap B)}{P(B)}}$

Where $P(A\cap B)$ is the probability that both events occur and P(B) is the probability that B occurs.

Let's define events A and B for the question. There are 11 students that have a brother and 9 that have a sister. Two of those students have a brother and a sister.

We are given the fact that the selected student has a brother: this is the event that has already occurred, thus:

B = A student has a brother

A = A student has a sister

The probability that a student has a brother is:

$\displaystyle P(B)=\frac{11}{28}$

The probability that the student has a brother and a sister is:

$\displaystyle P(A\cap B)=\frac{2}{28}$

Thus, the conditional probability is:

$P(A\mid B)={\frac {\frac{2}{28}}{\frac{11}{28}}}$

Simplifying:

$\mathbf{\displaystyle P(A\mid B)=\frac{2}{11}}$

4 0

3 years ago

If a unit price label has a unit price of 21.5 cents per pound, how much is the total price for an 8 pound package?

Mekhanik [1.2K]

Given:
unit price per pound = 21.5 cents
bought 8 pound package

find: total amount paid for 8 pound package.

We need to convert cents into dollars to avoid confusion.

21.5 cents x 1 dollar / 100 cents = 21.5 dollar / 100 = 0.215 dollars

0.215 dollars * 8 pounds = 1.72 dollars.

my answer is B. $1.72

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3 years ago

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Planes A and B intersect in line s. If point V is a point on line s, then it lies on _____.

eduard

The answer is : Both plane A and B.

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4 years ago

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Solve 7x 12.4=5x-7.6

Zigmanuir [339]

X=-10 hope I helped! :)