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3 years ago

What is x 7x-21=4x-36

Mathematics

1 answer:

soldier1979 [14.2K]3 years ago

5 0

Answer:

x = -5

Step-by-step explanation:

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How many unique 5 card hands can be drawn from a deck of cards?

sweet-ann [11.9K]

Answer:

0 2.598.960

Step-by-step explanation:

There are 52 different cards. Order does not matter.

$\dfrac{52!}{(52 - 5)!5!} = 2598960$

7 0

3 years ago

A television weighs 50 pounds and a microwave

Ilia_Sergeevich [38]

Answer:

Step-50*t + 30*m = 1500, (1) (pounds)

4*t + 3*m = 138. (2) (cubic feet)

From (2), express 3m = 138 - 4t, and substitute it into (1). You will get

50t + 10*(138-4t) = 1500, or

10t = 1500 - 1380 ---> 10t = 1120 ---> t = 112 TVs.

From this point, find the number of microwaves on your own.

step by-step explanation:

3 0

3 years ago

Two nonadjacent angles formed by two intersecting lines are

Sophie [7]

Two vertical angles are formed. These angles are also equal to each other.

6 0

3 years ago

How many times can 448 go into 8

sveticcg [70]

It goes in 56 times. 448/8=56

7 0

3 years ago

Read 2 more answers

Imagine that you have developed a genetic test to detect the dominant allele (A) that cause a rare genetic condition. As with mo

s344n2d4d5 [400]

Answer:

Correct option: (B) 1.495%.

Step-by-step explanation:

Denote the events as follows:

X = the test is positive.

A = a person with the dominant allele

The information given are:

$P(X|A)=1\\P (X|A^{c})=0.005\\P(A)=0.01$

According to the law of total probability the probability of an event A, conditional upon the occurrence of another event B is:

$P(A)=P(A|B)P(B)+P(A|B^{c})P(B^{c})$

Use this law to compute the probability of person having a positive result as follows:

$P(X)=P(X|A)P(A)+P(X|A^{c})P(A^{c})\\=(1\times0.01)+(0.005\times(1-0.01))\\=0.01+0.00495\\=0.01495$

The percentage of positive result is: 0.01495 × 100 = 1.495%.

Thus, the percentage of the population will give a positive test is 1.495%.

4 0

3 years ago