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Alenkasestr [34]
2 years ago
7

Evaluate -x + 2.7 for x =0.9

Mathematics
2 answers:
HACTEHA [7]2 years ago
6 0
Hey!

x = 0.9
-x = -0.9

-0.9 + 2.7 ⇒ 2.7 - 0.9 

2.7 - 0.9 = 1.8

Answer ⇒ 1.8

Hope this helps! :)
DiKsa [7]2 years ago
3 0
Plug in 0.9 for x

-(x) + 2.7

- (0.9) + 2.7

simplify

2.7 - 0.9 = 1.8

1.8 is your answer

hope this helps
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steposvetlana [31]

Answer:

-93.5

Step-by-step explanation:

Divide -187 by 2

6 0
3 years ago
0.75 is the square root of what value?
lina2011 [118]
0.75^2 = 0.5625.....sq rt 0.5625 = 0.75
4 0
2 years ago
Read 2 more answers
Help i timed The bill for a pizza was $13.50. Charles paid for 4/5 the entire bill
Afina-wow [57]

Answer:

12.7

Step-by-step explanation:

you have to turn 4/5 into a decimal then subtract that from 13.50

3 0
2 years ago
A random sample of 100 people was taken. Eighty of the people in the sample favored Candidate A. We are interested in determinin
riadik2000 [5.3K]

Answer:

Option b - not significantly greater than 75%.

Step-by-step explanation:

A random sample of 100 people was taken i.e. n=100

Eighty of the people in the sample favored Candidate i.e. x=80

We have used single sample proportion test,

p=\frac{x}{n}

p=\frac{80}{100}

p=0.8

Now we define hypothesis,

Null hypothesis H_0 : candidate A is significantly greater than 75%.

Alternative hypothesis H_1 : candidate A is not significantly greater than 75%.

Level of significance \alpha=0.05

Applying test statistic Z -proportion,

Z=\frac{\widehat{p}-p_0}{\sqrt{\frac{p_0(1-p_0)}{n}}}

Where, \widehat{p}=80\%=0.80 and p=75%=0.75

Substitute the values,

Z=\frac{0.80-0.75}{\sqrt{\frac{0.75(1-0.75)}{100}}}

Z=\frac{0.80-0.75}{\sqrt{\frac{0.1875}{100}}}

Z=\frac{0.05}{0.0433}

Z=1.1547

The p-value is

P(Z>1.1547)=1-P(Z

P(Z>1.1547)=1-0.8789

P(Z>1.1547)=0.1241

Now, the p-value is greater than the 0.05.

So we fail to reject the null hypothesis and conclude that the A is not significantly greater than 75%.

Therefore, Option b is correct.

7 0
3 years ago
Help with 6 a and b please
34kurt

Answer:

a) y=\frac{50}{x}

b) y=25 when x=2

Step-by-step explanation:

y=\frac{k}{x} since y varies inversely with x.

We need to find the constant, k.

Let's use a point (x,y) on the curve.

We are given an (x,y)=(5,10):

10=\frac{k}{5}

Multiply both sides by 5:

10(5)=k

50=k.

So the equation is:

y=\frac{50}{x}

What is y when x=2?

y=\frac{50}{2}

y=25

8 0
2 years ago
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