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I am Lyosha [343]
2 years ago
12

Can anyone slove this with formula ( operations with rational number)​

Mathematics
2 answers:
Ipatiy [6.2K]2 years ago
6 0

Answer:

-3x / 4

Step-by-step explanation:

tankabanditka [31]2 years ago
3 0
The answer is -3/4 (-0.75 in decimal form, negative zero point seventy-five in word form). Why? Well, we can begin by converting the mixed number to an improper fraction:

8 x 1 = 8
8 + 1 = 9

Your final mixed number conversion is -9/8. Now we can simplify:

2/3 x -9/8

Since there are no common denominators currently listed, we can multiply as it is.

2 x -9 = -18
3 x 8 = 24

Your new fraction is -18/24. This fraction can be reduced to simplest form through dividing by 6.

-18 / 6 = -3
24 / 6 = 4

Your final fraction is -3/4.

Your final answer: 2/3 x (-1 1/8) = -3/4 or -0.75.

If you need help, let me know and I will gladly assist you.

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An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 240240 engin
mojhsa [17]

Answer:

p-value = 0.1213  (to 4-decimal places)

Step-by-step explanation:

Given:

N = 240

mean  = 7.5

s = 1.0

Solution

With N=240 and using the central limit theorem, distribution can be approximated as normal.

Let

Null hypothesis H0, mu = 7.6

Alternate hypothesis, mu not equal to 7.6  (two-tail test)

for

Alpha = 0.1 (two sided)

Z = sqrt(N)(mean – mu)/s = sqrt(240)(7.5-7.6)/1.0 = -1.54919

p-value  

= P(|Z|>1.54919)  

= 2P(Z>1.54919)

= 2(1-P(Z<1.54919)

=2(1-0.9393)     (using normal distribution table)

=0.12134

Since alpha = 0.1 < p-value (0.1213), H0 that mean = 7.6 is not rejected.

5 0
3 years ago
What is -3/2 times (-5 1/4)
diamong [38]

Answer:

Step-by-step explanation:

PEMDAS

Plug n' Chug in Calculator.

7 0
3 years ago
You have been assigned the job of doubling an investment by putting it in an account that earns 8% simple interest annually. Abo
marusya05 [52]

Answer: b

Step-by-step explanation: 12.5

4 0
2 years ago
If f(x) = x2 − 6x + 3 x − 1 , what is f(−1)? A) −5 B) −2 C) 2 D) 5
ale4655 [162]

Answer:

f(-1)=3

Step-by-step explanation:

f(x)=x^2-6x+3x-1

f(x)=x^2-3x-1

f(-1)=(-1)^2-3(-1)-1

f(-1)=1+3-1

f(-1)=4-1

f(-1)=3

8 0
3 years ago
A chess player played 112 games.If he won40 what is the ratio of lost games to won games?
ycow [4]
If he won 40, then he lost 112-40 or 72 games. 
Ratio= lost/win
Ratio=72/40
72/40

Hope this helps :)
8 0
3 years ago
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