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
KengaRu [80]
3 years ago
5

What value for c will make the expression a perfect square trinomial? X^2-7x+c

Mathematics
1 answer:
gavmur [86]3 years ago
6 0

Answer: c= 49/4

Step-by-step explanation:

You might be interested in
The radius of a sphere is 6 units.
Rasek [7]

Answer:

choice 2) 4/3πr³

Step-by-step explanation:

5 0
3 years ago
A standard deck of cards has 52 cards divided into 4 suits, each of which has 13 cards. Two of the suits ($\heartsuit$ and $\dia
Gnoma [55]

Answer:

The number of ways to select 2 cards from 52 cards without replacement is 1326.

The number of ways to select 2 cards from 52 cards in case the order is important is 2652.

Step-by-step explanation:

Combinations is a mathematical procedure to compute the number of ways in which <em>k</em> items can be selected from <em>n</em> different items without replacement and  irrespective of the order.

{n\choose k}=\frac{n!}{k!(n-k)!}

Permutation is a mathematical procedure to determine the number of arrangements of <em>k</em> items from <em>n</em> different items respective of the order of arrangement.

^{n}P_{k}=\frac{n!}{(n-k)!}

In this case we need to select two different cards from a pack of 52 cards.

  • Two cards are selected without replacement:

Compute the number of ways to select 2 cards from 52 cards without replacement as follows:

{n\choose k}=\frac{n!}{k!(n-k)!}

{52\choose 2}=\frac{52!}{2!(52-2)!}

      =\frac{52\times 51\times 50!}{2!\times50!}\\=1326

Thus, the number of ways to select 2 cards from 52 cards without replacement is 1326.

  • Two cards are selected and the order matters.

Compute the number of ways to select 2 cards from 52 cards in case the order is important as follows:

^{n}P_{k}=\frac{n!}{(n-k)!}

^{52}P_{2}=\frac{52!}{(52-2)!}

       =\frac{52\times 51\times 52!}{50!}

       =52\times 51\\=2652

Thus, the number of ways to select 2 cards from 52 cards in case the order is important is 2652.

6 0
3 years ago
-38+(-59) whats the answer
zhuklara [117]

Answer:

-97

Step-by-step explanation:

-38 + (-59)

-8 + (-9) = -17

-30 + (-50) = -80

-80 + -17 = -97

5 0
3 years ago
$30,000 for 15 years at a yearly simple interest rate of 5%
djverab [1.8K]
Hi there

To find the simple interest earned
Use this formula
I=prt
I interest earned?
P principle 30000
R interest rate 0.05
T time 15 years

So
I=30,000×0.05×15
I=22,500

Hope it helps
8 0
3 years ago
What is the total cost of a $12 t-shirt if the sales tax is 6.5%?
Black_prince [1.1K]
12.78 because if you do ( 12 X .065 you get .78 which you then add to 12$ and get a total of 12.78
4 0
3 years ago
Other questions:
  • Which of the following is the correct definition of an angle? A. A shape formed by two intersecting lines from a common point B.
    12·2 answers
  • What would be the best method to use in order to solve the following quadratic equation?
    9·2 answers
  • Least to greatest -1.65/2 -7/80.9 -6/5
    14·1 answer
  • A gardener plants roses and carnations in the areas shown in the model below.
    9·2 answers
  • Which of the following points lie in the solution set to the following system of inequalities?
    14·1 answer
  • What is the value of x when y equals 2 in the equation y equals x over 4 - 7
    8·1 answer
  • (answer with "sometimes, always, or never true")<br> A whole number is an integer.
    9·2 answers
  • |−5| − |−9| (Work The problem out)
    9·1 answer
  • Rearrange the standard form of the equation below into y = mx + b by isolating y. <br> 5x − 2y = 6
    14·1 answer
  • Pleeeeeeeeeeeeeeeeeaaaaaaaaaaaaaaaaase help
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!