Phương trình (m + 2)x2 – 2mx + 1 = 0 là phương trình bậc hai khi:
A. m ≠ 1. B. m ≠ -2. C. m ≠ 0. D. mọi giá trị của m.

Answers

Answer 1

B::: m ≠ -2.............


Related Questions

add 5 with product of 4 and 6=​

Answers

Answer:

29

Step-by-step explanation:

Product of 4 and 6, (4x6) = 24

Now,

By adding 5 to 24, we get

(24+5) = 29

97 percent of 245m what is the answer

Answers

Answer:

multiply them

Step-by-step explanation:

trust me on this one i love using that hack

X and Y are in partnership with capital contributions of $50000 and $30000 respectively. The partnership agreement provides that profits are to be shared in proportion to capital contributions and each partner is entitled to 10% interest on capital. Profit for the year was $37000. What was the total amount credited to Y's current account at the end of the year? A $10875 B $13875 C $18125 D $23125

Answers

Answer: $13875

Step-by-step explanation:

The interest in capital for X will be:

= 10% × $50000

= $5000

The interest in capital for Y will be:

= 10% × $30000

= $3000

The total amount credited to Y's current account will be:

= 3000/(3000 + 5000) × $37000

= 3/8 × $37000

= $13875

The total amount credited to Y's current account at the end of the year will be $13875

Do not round your answer. Type in the number with the decimal. 15% of 25 is

Answers

Answer:

to add on to what the other dude said its 4

Step-by-step explanation:

A baseball stadium has 15,002 seats. The lower level has 50 fewer than three times as many seats as the upper level. The middle level has 40 more than twice as many seats as the upper level. You solved for x and found that the upper level has 2,502 seats.

Answers

Answer:

upper level chairs = 2,502 chairs

Lower level chairs = 7,456 chairs

Middle level chairs = 5044 chairs

Step-by-step explanation:

A baseball stadium holds 15,002 seats. The lower level has 50 fewer than three times as many seats as the upper level. The middle level has 40 more than twice as many seats as the upper level. The upper level has( ) seats.

Total chairs in the stadium = 15,002

Let

upper level chairs = x

Lower level chairs = 3x - 50

Middle level chairs = 2x + 40

Total = lower level + middle level + upper level

15,002 = (3x - 50) + (2x + 40) + x

15,002 = 3x - 50 + 2x + 40 + x

15,002 = 6x - 10

15,002 + 10 = 6x

15,012 = 6x

x = 15,012 / 6

x = 2,502

upper level chairs = x = 2,502 chairs

Lower level chairs = 3x - 50

3(2,502) - 50

= 7506 - 50

= 7,456 chairs

Middle level chairs = 2x + 40

= 2(2502) + 40

= 5004 + 40

= 5044 chairs

Four points, E, F, G, and H lie on the coordinate plane. Of the choices given, which two points have the longest
distance between them?

A. e and f
B. f and g
C. g and h
D. h and e

Answers

Answer:

D H and E i think .........

Write the next thee numbers in each number pattern. Describe the pattern.
a) 2, 4, 3, 6, 5, 10, 9, 16, …
b) 7, 5, 8, 6, 9, 7, 10, …

Answers

Answer:

a) 2, 4, 3, 6, 5, 10, 9, 16, ...

Step-by-step explanation:

plz help me with this

Answers

Answer:

x=100

Step-by-step explanation:

100 and x are vertical angles and vertical angles are equal

x = 100

Answer:

100 degrees

Step-by-step explanation:

Angle x is formed from two intersecting segments. Opposite angles of intersecting lines or segments are congruent therefore since the opposite angle is given at 100 degrees, x must also be 100.

write a formula that describes the value of an initial investment of $100 that loses value at a rate of 8% per year compounded continuously

Answers

Answer:

[tex]A = 100(.92)^{t}[/tex]

Step-by-step explanation:

5.
MULTIPLE CHOICE: There are 15 pieces of fruit in a bowl and 6 of them are apples.
What percentage of the pieces of fruit in the bowl are apples?
a.
0.06%
b.
0.4%
C.
6%
d.
40%


Answers

Answer:

d

Step-by-step explanation:

alr, 15 fruits total, 6 are apples.

6/15 = 2/5

2/5 is also the same as 40% or 0.4, therefore the option is d.

go to gauthmath's sub reddit if needing more help ^^

The following two-way table describes student's
after school activities. Find the probability that a
randomly selected student is in music/drama:
Grado
Sports
Music/Drama
Work
Sophomore
20
7
3
Junior
20
13
2
Senior
25
5
5
P(Music/Drama) = [?]
Round to the nearest hundredth.
Please HELP MEEE!!!!!!

Answers

Answer:

1/4

Step-by-step explanation:

Firstly, we need to get the total number of students on the table

We have this as;

20 + 20 + 25 + 7 + 13 + 5 + 3 + 2 + 5 = 100

Now, we sum up the values we have in the music/Drama column

We have this as;

7 + 13 + 5 = 25

so the probability of selecting a student in the music/drama group is the number of music/drama students divided by the total number

That would be

25/100 = 1/4

Write the equation of the line perpendicular to y=1/2x+3 that contains (5,-4)

Answers

Answer:

y = -2x + 6

Step-by-step explanation:

y = -2x + b

-4 = -2(5) + b

-4 = -10 + b

6 = b

please help I beg you you will get marked branliest asap

Answers

Answer:

its D I think........ not 100% sure

Solve for t.

( 124 + 6 x 8 ) ÷ 2 = t

Answers

( 124 + 6 x 8 ) ÷ 2 = t

=> ( 124 + 48 ) ÷ 2 = t

=> 172 ÷ 2 = t

=> 86 = t

Hi there!

[tex]\large\boxed{t = 86}[/tex]

To solve, we must use PEMDAS:

P: Parenthesis

E: Exponents

M: Multiply

D: Divide

A: Add

S: Subtract

Evaluate the inside of the parenthesis:

(124 + 6 × 8)

Multiply first:

(124 + 48)

Evaluate:

124 + 48 = 172

Divide by 2:

172 ÷ 2 = 86 = t

50 people were called in a wedding and 60 people came, then how many percent of the people came​

Answers

Answer:

120%

Step-by-step explanation:

From the question, 50 people were called and 60 people came

what this mean is that 10 extra people came

Initially, the 50 out of the 60 represented the first 100%

Now, for the 10, what we have to do is to find the percentage of 50 that is 10

We have this as;

10/50 * 100 = 20%

Now, we add this to the initial 100%

So we have 100 + 20 = 120%

There are three square gardens whose lengths of the sides are 3 ft, 7ft, and 2 ft respectively. Find the total area of the three gardens in square feet

Answers

Answer:

62 sq ft

Step-by-step explanation:

3 · 3 = 9

The first garden's area is 9 square feet.

7 · 7 = 49

The second garden's area is 49 square feet.

2 · 2 = 4

The third garden's area is 4 square feet.

We add 9 + 49 + 4.

9 + 49 + 4 = 62

The total area of the three gardens is 62 square feet.

Can someone help me I don't understand

Answers

Step-by-step explanation:

Hey there!

From the above right angled triangle ABC;

Taking Angle ABC as reference angle;

Angle ABC = ???

Perpendicular (p) = AC = 15

Base (b) = AB = 47

Now;

Taking ratio of sin;

[tex] \tan( \alpha ) = \frac{p}{b} [/tex]

Keep value;

[tex] \tan( \alpha ) = \frac{15}{47} [/tex]

Simplify it;

[tex] \tan( \alpha ) = 0.3191489[/tex]

Take tan to next side;

Angle ABC (alpha) = tan'(0.3191489)

Therefore, the measure of angle ABC is 17.70°.

Hope it helps!

1. A triangular piece of wood has side lengths 14 cm, 19 cm and 30 cm. The angle between the 14 cm and 19 cm sides need to be known to see if it will fit properly into a cabinet. What is the angle, accurate to one decimal place, between the 14 cm and 19 cm sides? ​

Answers

Answer:

130.1°

Step-by-step explanation:

Using the cosine rule:

[tex] = { \cos }^{ - 1} ( \frac{ {14}^{2} + {19}^{2} - {30}^{2} }{2 \times 14 \times 19} )[/tex]

= 130.146°

The measure of angle is 72.8° (accurate to one decimal place ) between the 14 cm and 19 cm sides.

What is the Cosine Rule?

The Law of Cosines (also called the Cosine Rule) is defined as it relates all three sides of a triangle with an angle of a triangle.

c² = a² + b² − 2ab cos(C)

The cosine rule, also known as the law of cosines, relates all 3 sides of a triangle with an angle of a triangle. it relates the lengths of the sides of a triangle to the cosine of one of its angles.

Given data as :

Length of side a = 14 cm

Length of side b = 19 cm

Length of side c = 20 cm

The angle of C is the between the side a and side b

According to the cosine rule,

c² = a² + b² − 2ab cos(C)

Substitute the values of a, b and c in the Cosine Rule,

20² = 14² + 19² - 2(14)(19)cos(C)

400 = 196 + 361 - 532cos(C)

400 = 557 - 532cos(C)

532cos(C) = 557 - 400

532cos(C) = 157

cos(C) = 157/532

cos(C) = 0.2951

(C) = cos⁻¹(0.2951)

(C) = 72.83

(C) = 72.8° (accurate to one decimal place)

Hence, the measure of angle is 72.8° (accurate to one decimal place ) between the 14 cm and 19 cm sides.

Learn more about Cosine Rule here:

https://brainly.com/question/20839703

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Which of the following is true about a circle? A The diameter is the same as the radius B The diameter is the same length as the circumfrence C The dimeter is half the legth of the radius D The diameter is twice the size of the radius

Answers

Answer:

d

Step-by-step explanation:

answer is d It can't be anything else

Answer:

D the diameter is twice the size of the radius

Step-by-step explanation:

What is the value of a?
2a+10=74​

Answers

the value of a is 32°.

Answer:

Solution given:

2a+10=74

Subtract both side by 10

2a+10-10=74-10

2a=64

divide both side by 2

2a/2=64/2

a=32°

Answer:

a = 32

Step-by-step explanation:

2a + 10 = 74.

We have to find the value of a.

Let's begin.

2a + 10 = 74.

Step 1 :- Move constant to the right-hand side and change their sign.

2a = 74 - 10.

Step 2 :- Subtract 10 from 74.

2a = 64

Step 3 :- Divide both side by 2.

[tex] \sf \frac{2a}{2} \\ [/tex] = [tex] \sf \frac{64}{2} \\ [/tex]

Step 4 :- Reduce the fractions.

a = 32.

Given that PQ/ST = QR/TU= RS/US, select the postulate or theorem that you can use to conclude that the triangles are similar.

Answers

Answer: SSS Similarity Theorem (Choice A)

This is because we have three pairs of corresponding sides that form the same ratio, as shown by the given equation PQ/ST = QR/TU = RS/US.

That equation is basically the shorthand version of PQ/ST = QR/TU and QR/TU = RS/US combined together as one.

Is the data set "color of the coal taken from a rail car" quantitive or qualitative? If it is quantitative is it descents or continuous?
A quantitative , discrete
B quantitative continuous
C qualitative
D neither

Answers

Answer:

It's A.)

Step-by-step explanation:

The correct answer is A

a box has a length of 6x inches. the width equals one third the length, and the height equals half the length. if the volume equals 972 cubic inches, what does x equal?

Answers

a box has a length of 6x inches

l=6x

the width equals one third the length

w=[tex]\sf{\dfrac{1}{3}×6x }[/tex]

w=2x

the height equals half the length.

h=[tex]\sf{\dfrac{1}{2}×6x }[/tex]

h=3x

we know that,

Volume of a rectangle box=l×w×h

According to the question,

if the volume equals 972 cubic inches,

l×w×h=volume

6x × 3x × 2x=972

36x^3=972 cubic unit

x=972/36

x=27

Therefore:-

The value of x is 27

Given that,

a box has a length of 6x inches

so,

l=6x

But,the width equals one third the length

[tex]w=\dfrac{1}{3}×6x \\\\w=2x [/tex]

again,the height equals half the length.

[tex]h=\dfrac{1}{2}×6x \\\\h=3x[/tex]

we knows:-

Volume of a rectangle box=l×b×h

From the question,

if the volume equals 972 cubic inches,

l×w×h=volume6x × 3x × 2x=97236x^3=972 cubic unitx=972/36x=27.

Final solution:

.°.The value of x is 27.

At a coffee shop, the first 100 customers'
orders were as follows.
Small
Large
Medium
Hot
un
48
22
Cold
8
12
5
5
What is the probability that a customer ordered
a large given that he or she ordered a cold
drink?
Rounded to the nearest percent, [? ]%

Answers

Answer:

people who ordered a cold drink=

[tex]8+12+5=25[/tex]

people who ordered a large cold drink= 5

[tex]probability= \frac{5}{25}[/tex] [tex]=\frac{1}{5}[/tex]

[tex]=\frac{1}{5} \times100=20~\%[/tex]

[tex]Answer: 20\%[/tex]

-----------------------

Hope it helps...

Have a great day!!

The probability that the customer ordered a large given that he or she ordered a cold drink is 5%.

What is Probability?

Probability is simply the possibility of getting an event. Or in other words, we are predicting the chance of getting an event.

The value of probability will be always in the range from 0 to 1.

Given the order of the first 100 customers in a coffee shop.

Number of customers who ordered a large which is also a cold drink = 5

Total number of customers = 100

Probability = Number of desired outcomes / Total number of outcomes

Substituting,

Probability = 5 / 100 = 0.05 = 5%

Hence the required percent is 5%.

Learn more about Probability here :

https://brainly.com/question/30034780

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is (the fraction in the photo) rational or irrational?

Answers

Answer:

Irrational

Step-by-step explanation:

The square root of 2 is an irrational number as it is: ≈ 1.41. When you divide the square root of 2 by 3, it's still irrational: 0.47140452...

what is the multiple of 13​

Answers

Answer:

1 and 13 itself

hope this help you

Which expression is equivalent to (a^-8b)
(a^-5b^3)
Assume a≠0,b≠0.

Answers

Answer:

Step-by-step explanation:

I think it is C

8u^2- 42u^2
Help plzz

Answers

Answer:

- 34u^2

Step-by-step explanation:

8u^2 - 42u^2

= ( 8 - 42 )u^2

= - 34u^2

[tex]\huge\textsf{Hey there!}[/tex]

[tex]\large\textsf{The only thing we can do to solve for this equation is to COMBINE}\\\large\textsf{the LIKE TERMS. }[/tex]

[tex]\mathsf{8u^2 - 42u^2}\\\mathsf{= (8u^2- 42u^2)}\\\mathsf{= 8 - 42 \rightarrow \bf -34}\\\textsf{Thus this means }\mathsf{8u^2 - 42u^2}\textsf{ has to equal to }\mathsf{ \bf -34u^2}\\\\\\\\\\\\\boxed{\boxed{\large\textsf{Answer: \bf-34u} \mathsf{\bf ^2}}}\huge\checkmark[/tex]

[tex]\large\textsf{Good luck on your assignment and enjoy your day!}\\\\\frak{Amphitrite1040:)}[/tex]

Please help. I need it

Answers

Answer:

angle c = 32.204°

Logan was going to go to
Disneyland in America so he got
$450 from the bank. Then he
changed my travel plans, to go to
Eurodisney in Paris. How many
Euros will he have to spend?
Exchange Rate
GBP to Dollars £1: $1.50
GBP to Euros £1: €1.38

Answers

The answer is €414. Let me know if you need detailed solving
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