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Ann [662]
3 years ago
15

B2a%7D%20" id="TexFormula1" title="x = \frac{b + - \sqrt{{b}^{2} - 4ac } }{2a} " alt="x = \frac{b + - \sqrt{{b}^{2} - 4ac } }{2a} " align="absmiddle" class="latex-formula">
O True
O False
​
Mathematics
1 answer:
Phantasy [73]3 years ago
3 0

If it is asking if that equation is the quadratic formula, then the answer is false. The reason why is that the first 'b' should be negative

The quadratic formula is

x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}

You might be interested in
The heart beats 103680 per year, how many heart beats per minute?
kompoz [17]

Answer:

Step-by-step explanation:

60 sec= 1 min

60min=1hour

24hours=1day

7days=1week

52 weeks =1 year

24x7= 168hours in a week

168hours x 52 =8736 hours in a year

8736x60=524160mins

524160mins=  1 year

the heart beats 103680 in a year

the heart will beat 524160/103680=5.05555555556 in a minute

6 0
4 years ago
10. A movie theater advertises that a family of two adults, one student, and one child between the ages of 3
BlackZzzverrR [31]

Answer:

Students ticket = $4

Child ticket = $1

Adult ticket = $5

Step-by-step explanation:

Let the price of the student ticket be $x and the price of a child ticket be $y.  An adult ticket costs as much as the combined cost of a student ticket and a child ticket, so the price of one adult ticket is $(x+y).

1. A movie theater advertises that a family of two adults, one student, and one child between the ages of 3 and 8 can attend a movie for $15. Then

2(x+y)+x+y=15

2. If you purchase 1 adult ticket, 4 student tickets, and 2 child tickets for $23, then

(x+y)+4x+2y=23

Now, solve the system of two equations:

\left\{\begin{array}{l}2(x+y)+x+y=15\\ \\(x+y)+4x+2y=23\end{array}\right.\Rightarrow \left\{\begin{array}{l}3(x+y)=15\\ \\5x+3y=23\end{array}\right.\\ \\\left\{\begin{array}{l}x+y=5\\ \\5x+3y=23\end{array}\right.\\ \\\left\{\begin{array}{l}y=5-x\\ \\5x+3(5-x)=23\end{array}\right.

Solve the last equation

5x+15-3x=23\\ \\2x=23-15\\ \\2x=8\\ \\x=4\\ \\y=5-x=5-4=1

Students ticket = $4

Child ticket = $1

Adult ticket = $5

8 0
3 years ago
Read 2 more answers
What is the value of t?
Lilit [14]

Hey!

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

I'm going to assume that the value of t is x.

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

Steps To Solve:

3(x - 2) = 6

~Distributive Property

→ 3x - 6 = 6

~Simplify

→ 3x + (-6) = 6

~Add 6 to both sides

→ 3x + (-6) + 6 = 6 + 6

~Simplify

→ 3x = 12

~Divide 3 to both sides

→ 3x/3 = 12/3

~Simplify

→ x = 4

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

Hence, x equals 4!

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

Hope This Helped! Good Luck!

8 0
3 years ago
Which of the following is algebraically equivalent to the sum of 4x^2 -8x +7 And 3x^2-2x-5
VARVARA [1.3K]

All you have to do, is combine like terms. Let's go through it:

(4x^2-8x+7)+(3x^2-2x-5)

Arrange it so you can easily combine like terms:

4x^2+3x^2-8x-2x+7-5 = 7x^2-10x+2

So, your answer for the sum is 1) 7x² - 10x + 2

5 0
4 years ago
Can somebody please help me
MaRussiya [10]

Answer:

201.06

Step-by-step explanation:

The volume of a cylinder is the area of the base (\pi 2^2) times the height (16).

3 0
3 years ago
Read 2 more answers
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