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MAXImum [283]
3 years ago
14

Which of the following is the solution to the quadratic equation x2−10x+21=0 ?

Mathematics
2 answers:
Annette [7]3 years ago
7 0

Step-by-step explanation:

the answer is the image above

Bess [88]3 years ago
3 0

Answer:

x=3  and x=7

Step-by-step explanation:

x2 - 10x + 21=0

a=1, B=-10, c=21

delta= b2 - 4(ac)

if delta >0 => have two answer

x1= -b - _/delta / 2a = -(-10) - _/16 / 2.1 = 3

x2= -b + _/delta /2a = -(-10) + _/16 / 2.1= 7

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I don’t understand this
Natalka [10]

√7 is not a perfect square , so it's irrational

Answer is B. irrational numbers

P.S .

Keep in mind that any of non perfect square is irrational

5 0
3 years ago
Read 2 more answers
If there are 16oz in a pound how many oz are in 10 pounds
liq [111]
160oz. This is because, knowing that there are 16oz in one pound, you can multiply 16 by how many pounds you have to get the oz measurement. In this problem, we multiplied 16 by 10, getting 160oz.
4 0
3 years ago
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What is 9x6+(5x7+4x3)63x8
irina [24]

Solution:

=9*6+(5*7+4*3)63*8\\=54+(35+12)504\\=54+47*504\\=54+23688\\=23742\\

Answer:

23742

<em>Hope this was helpful.</em>

8 0
3 years ago
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The box plot shows the ages of people at a movie screening. What percent of the people are between 20 and 37 years old?
iVinArrow [24]

Step-by-step explanation:

You didn't give the box plot, but to obtain the percentage of people between 20 and 37 years old, first of all, find the total number of people, T. Next, find the total number of people between 20 and 37 years old, t.

Then the percentage we want to find is:

P = T/t × 100

7 0
3 years ago
A container is 24 m long, 9 m wide and 8 m high.
GuDViN [60]

Answer:

900,000 books.

Step-by-step explanation:

The volume of the container = 24 * 9 * 8

= 1728 m^3

The volume of each book = 20*16*6 = 1920 cm^3

There are 100*100*100 = 1,000,000 cm^3 in 1 m^3.

So the number of books the container can hold

=   (1728 * 1000000) / 1920

= 900,000.

5 0
3 years ago
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