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natita [175]
2 years ago
15

Is the equation 8 + 4= -5 + 7 true false or open and why

Mathematics
2 answers:
zysi [14]2 years ago
4 0
This is false, because the equation is then 12=2, which is incorrect.

Hope this helps!

~ThePirc
slega [8]2 years ago
4 0
1. Solve
8 + 4 = -5 + 7
12 = 2

Obviously 12 doesn't equal 2 so the equation is false. Here are the definitions:
True: The equation is true. 
Example: 2 =2

False: The equation is false or not true. 
Example: -2 = 2

Open: The equation is true or false depending on what the variable is. 
Example: 2x = 2


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Answer:

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Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
How many different 5-person subcommittees can be formed from a club having 12 members
Wittaler [7]
Given that there are 12 persons, the first choice may be in 12 different ways, the second choice may be in 11 different ways, ther third in 10 different ways, the fourth in 9 different ways and the fith in 8 different ways, for a total of:

12x11x10x9x8 different combinations.

Now you have to take in account that 5x4x3x2 are repetitions. So you have to divide the previos counting by 5x4x3x2.

(12x11x10x9x8)/(5x4x3x2) = 792 different subcommittees.

Also, you can use the formula for combinations: C(m,n) = m! / (n! (m-n)!)

C (12, 5) = 12! / (5!) (12-5)! = [12x11x10x9x8x7!] / [5! 7!] = [12x11x10x9x8]/[5x4x3x2] = 792
3 0
2 years ago
A large bacterium measures 750 micrometers in diameter. One micrometer = 10 − 6 meters. How would you express the diameter of th
ANEK [815]

Answer:

7.5 * 10^-4

Step-by-step explanation:

To express this, we will have to multiply 750 by the conversion unit

we have this as;

750 * 10^-6

750 = 7.5 * 10^2

so we have;

7.5 * 10^2 * 10^-6

= 7.5 * 10^(-6+2)

= 7.5 * 10^-4

7 0
2 years ago
Dean had already read 1 book this year before joining a book club, and he plans to read 1 book every month now that he has joine
solniwko [45]

<em>b</em><em> </em>for <em>books</em><em> </em>read. b=1x + 1. the amount of months he's been in the club goes for x and +1 because he already read a book before he joined. if you do easy math, he's been there for 8 months because he read 9 books. i probably got the equation backwards but this works both ways imo.

6 0
3 years ago
Find the square root of 156.25 by division method
vampirchik [111]
Hello,

I don't know the divison method but is it these one?

156.25= 625/4=(25/2)²

√156.25= 12.5
4 0
3 years ago
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