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navik [9.2K]
2 years ago
10

Simplify 2/3 - 5/6•8 A) -4 B) -6 C) -22/3 D) -4/3

Mathematics
1 answer:
Cerrena [4.2K]2 years ago
7 0

Answer:

B) -6

Step-by-step explanation:

5/6 x 8 = 5/6 x 8/1 = 40/6 / 2 = 20/3 = 2/3 - 20/3 = -18/3 / 3 = -6

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Please help me if you can thanks
iren2701 [21]

Step-by-step explanation:

a, 3

b,

draw lines through the corresponding corners of each shape  These lines will cross at the centre of enlargement O

3 0
3 years ago
(x+3)(x-5)-(4x+1)(1-4x)=17x^
Greeley [361]

Answer: \boxed{Sol=\{\dfrac{7}{4} \}}\\

I suppose 17x^ means 17x².

and that we must solve the equation.

Step-by-step explanation:

(x-3)(x-5)-(4x+1)(1-4x)=14x^2\\\\x^2-3x-5x+15+(4x+1)(4x-1)=17x^2\\\\x^2-8x+15+16x^2-1=17x^2\\\\-8x+14=0\\\\8x=14\\\\x=\dfrac{7}{4} \\\\\boxed{Sol=\{\dfrac{7}{4} \}}\\

6 0
3 years ago
A research article described a random sample of 584 smokers who tried to quit smoking by using either a nicotine patch or e-ciga
vitfil [10]

Answer:

D. Chi-square test for two-way table

Step-by-step explanation:

To test if there is an association between the percentage of people that successfully stop smoking and the method they used to do so, a random sample of 584 smokers who tried to quit smoking and was orted by the method they used to help themselves to achieve their goal (nicotine-patch or e-cigarettes). After six months, the proportion of subjects that successfully stopped smoking.

In this case, the t-test is not applicable, this statistic is to test the population mean. The variable of the study is the proportion of people that successfully stopped smoking using either method.

To apply Chi-Square tests the condition to be met is that the variable is categorizable and since the data can be organized in a 2x2 table, all expected frequencies should be >5.

The objective of the Goodness-to-fit test is to test if a population follows a certain theoretical model.

In this example, the objective is to compare the proportion of people that successfully quit smoking and the proportion of people that failed by using either method.

8 0
3 years ago
Sales of $10,000 increase by 65% each year.<br> Whats the y
Elan Coil [88]

Answer:

153.8 I guess... this is your answer

3 0
3 years ago
-10=3(2m+5)+5 whats the answer
pshichka [43]

Answer:

m=5

Step-by-step explanation:

multiply 3 with the numbers in the parentheses (2m + 5) when you have 6m + 15 you will plug it into -10=6m+15+5 add your commons which will be 15 + 5 which will be 20 so the equation will be -10=6m+20, now cross your 6m with your -10 which will be -10 + 6m = 20, now cross over your -10 with 20, now your equation will be 6m=20 + 10 so now you will get 6m = 30 now divide both sides by 6 and m=5

8 0
3 years ago
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