1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Whitepunk [10]
2 years ago
15

it took heather 2/3 of an hour to read 20 pages in her library book. how long did it take her to read one page

Mathematics
1 answer:
NNADVOKAT [17]2 years ago
6 0
2/3 hour .      1 hour = 60 minutes.

2/3 hour = (2/3) * 60

               = 40 minutes.

20 pages took  (2/3) hour = 40 minutes.

20 pages took her 40 minutes to read.

1 page = 40/20 = 2 minutes.

1 page took her 2 minutes to read.
You might be interested in
Solve x^2 x=0.factorise.
Semenov [28]
x^2\pm x=0\\\\x(x\pm1)=0\iff x=0\ or\ x\pm1=0\\\\\boxed{x=0\ or\ x=\mp1}\\\\if\ x^2+x=0\ then\ x=0\ or\ x=-1\\if\ x^2-x=0\ then\ x=0\ or\ x=1
4 0
3 years ago
Which of the following is a polynomial with roots: − square root of 5 , square root of 5 , and −3?
tresset_1 [31]
Roots: - √5 , √5, and - 3

=> these are factors of the polynomial: (x + √5), (x - √5), and (x + 3).

Multiply those three factors:

(x + √5) (x - √5) ( x + 3) = [x^2 - 5] ( x + 3 ) = x^2 + 3x^2 - 5x - 15

Therefore the polynomial x^2 + 3x^2 - 5x - 15 is a polynomial with the given roots.

Answer: option B. x^3 + 3x^2 - 5x - 15
4 0
3 years ago
A basketball player has made​ 70% of his foul shots during the season. If he shoots 3 foul shots in​ tonight's game, what is the
yulyashka [42]

Answer:

There is a 34.3% probability that he makes all of the​ shots.

Step-by-step explanation:

For each foul shot that he takes during the game, there are only two possible outcomes. Either he makes it, or he misses. This means that we use the binomial probability distribution to solve this problem.

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}.p^{x}.(1-p)^{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 p is the probability of X happening.

In this problem we have that:

n = 3, p = 0.7

What is the probability that he makes all of the​ shots?

This is P(X = 3).

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 3) = C_{3,3}.(0.7)^{3}.(0.3)^{0} = 0.343

There is a 34.3% probability that he makes all of the​ shots.

7 0
3 years ago
What's the center of a circle whose equation is (x – 14)2 + (y + 21)2 = 64?
kvasek [131]

Answer:

The center of the circle is:

  • \left(a,\:b\right)=\left(14,\:-21\right)

Thus, option (2) is true.

Step-by-step explanation:

The circle equation is given by

\left(x-a\right)^2+\left(y-b\right)^2=r^2

here,

  • r =  raduis
  • center = (a, b)

Given the equation

\left(x-14\right)^2+\left(y+21\right)^2=64

\mathrm{Rewrite}\:\left(x-14\right)^2+\left(y+21\right)^2=64\:\mathrm{in\:the\:form\:of\:the\:standard\:circle\:equation}

\left(x-14\right)^2+\left(y-\left(-21\right)\right)^2=8^2

comparing with the circle equation

\left(x-a\right)^2+\left(y-b\right)^2=r^2

Therefore, the center of the circle is:

  • \left(a,\:b\right)=\left(14,\:-21\right)

Thus, option (2) is true.

7 0
2 years ago
Which speed is the fastest?
spayn [35]
D 32/3 yards in 15 min
6 0
2 years ago
Other questions:
  • A theater has 358 seats on the main level and 122 seats in the balcony.There are 6 shows each day.What is the greatest number of
    9·2 answers
  • Drag the phrases into the box to match each expression
    5·2 answers
  • The volleyball team sold 16 items on the first day of a bake sale, 28 items on the second day, and 12 items on the last day. The
    14·1 answer
  • Solve for n. Please explain if you can
    15·1 answer
  • One liter is approximately equal to 0.26 gallons. Find the volume rounded to the nearest hundredth of a liter of a container tha
    7·1 answer
  • –5x+8y= 10<br> 7x-2y= -14
    10·1 answer
  • A number or the product of a number and a variable in an algebraic expression; a number in a sequence is a term?
    15·1 answer
  • Use properties to evaluate<br> (2)-27<br> 3)<br> QUESTION<br> 3<br> -3<br> O O O O<br> 27<br> -27
    13·1 answer
  • Expert Help: Carlos has equal numbers of classical songs, country
    8·1 answer
  • Rex is currently taking physics as one of his electives in school. His grade at the end of the year is determined by the average
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!