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3 years ago

I can't figure this one out.

Mathematics

1 answer:

mezya [45]3 years ago

5 0

Answer:

I'm pretty sure the answer is B. x+6

Step-by-step explanation:

a polynomial with two terms (x and 6) is called a binomial. bi means two, so your answer would have two terms! hope this helped :)

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Peggy rode her bike 25 miles in 2 hours. At this rate, how far will she ride in 3 hours?

Zanzabum

37.5 miles

divide 25 by 2, that gives you 12.5
multiply 12.5 by 3 to get 37.5

3 0

3 years ago

As a result of medical examination, one of the tests revealed a serious illness in a person. This test has a high precision of 9

Elina [12.6K]

Answer:

0.0098

Step-by-step explanation:

Given,

Probability of test is positive if the person has disease, P(T/D)=0.99

Probability of test is negative if the person has disease,

P(T'/D) = 1-0.99 = 0.01

Probability of test is negative if the person hasn't disease, P(T'/D')= 0.99

Probability of test is positive if the person hasn't disease,

P(T/D') = 1 - 0.99 = 0.01

Probability of occurrence of disease, P(D) = 0.0001

Probability of not occurrence of disease,

P(D) = 1 - 0.0001 = 0.9999

Probability that test will be positive either disease is present or not,

P(T) = P(T/D).P(D)+P(T/D').P(D')

=0.99 x 0.0001 + 0.01 x 0.9999

= 0.000099 + 0.009999

= 0.010098

So, the probability that the person will have disease if the test is positive,

$P(D/T)\ =\ \dfrac{P(T/D).P(D)}{P(T)}$

$=\ \dfrac{0.99\times 0.0001}{0.010098}$

= 0.0098

So, the required probability will be 0.0098.

8 0

3 years ago

Explain why the square root of a number is defined to be<br> equal to that number to the 1/2 power.

m_a_m_a [10]

Answer:

The square root is the inverse operation to the power of 2, so that whenever you take a number and perform both actions on it, you get the same number back.

5 0

3 years ago

How many like terms are in the expression:5a^2+6b+a^2-3b-2+4c.

Goryan [66]

Solution

Part 3

For this case we have 6 different terms

Part 4

We can do the following:

$5a^2+a^2+6b-3b+4c-2$

Part 5

And we can simplify on this way:

$6a^2+3b+4c-2$

7 0

2 years ago

In a circle, a 90-degree sector has area 196 pi in^2. What is the radius of the circle?

o-na [289]

Answer:

The radius of the circle is $28\ in$

Step-by-step explanation:

we know that

In a circle, a 90-degree sector represents a quarter of the circle area.

The area of a quarter circle is equal to

$A=\frac{1}{4}\pi r^{2}$

we have

$A=196\pi\ in^{2}$ ----> area of a quarter circle

$196\pi=\frac{1}{4}\pi r^{2}$

Simplify

$r^{2}=196*4$

$r=28\ in$

5 0

3 years ago