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kap26 [50]
2 years ago
9

9.58 - 2.2 × 3.5 + 0.32

Mathematics
2 answers:
Scorpion4ik [409]2 years ago
7 0

Answer:

2.2

Step-by-step explanation:

lana66690 [7]2 years ago
5 0

Answer:

2.2

Step-by-step explanation:

Multiply −

2.2 by 3.5

9.58−7.7+0.32

Subtract

7.7 from 9.58

1.88+0.32

Add

1.88 and 0.32

2.2

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Julie spent 1/6 of her money on books , 1/3 of the remainder on a dress and saved the rest.
Lana71 [14]

The answers are 5/9 and $234.

6 0
2 years ago
Read 2 more answers
A manufacturer of golf equipment wishes to estimate the number of left-handed golfers. A previous study indicates that the propo
never [62]

Answer:

A sample of 997 is needed.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the z-score that has a p-value of 1 - \frac{\alpha}{2}.

The margin of error is of:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

A previous study indicates that the proportion of left-handed golfers is 8%.

This means that \pi = 0.08

98% confidence level

So \alpha = 0.02, z is the value of Z that has a p-value of 1 - \frac{0.02}{2} = 0.99, so Z = 2.327.  

How large a sample is needed in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 2%?

This is n for which M = 0.02. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.02 = 2.327\sqrt{\frac{0.08*0.92}{n}}

0.02\sqrt{n} = 2.327\sqrt{0.08*0.92}

\sqrt{n} = \frac{2.327\sqrt{0.08*0.92}}{0.02}

(\sqrt{n})^2 = (\frac{2.327\sqrt{0.08*0.92}}{0.02})^2

n = 996.3

Rounding up:

A sample of 997 is needed.

3 0
3 years ago
Chantal cut an apple into a equal slices. She ate 4 slices and had 4 slices left. Which equation models the problem?
Citrus2011 [14]
So equal slices
total=x
she ate 4 slices from x so -4
x-4
she had 4 left
x-4=4
the equation would be x-4=4
8 0
3 years ago
What are the coordinates of the intersection of the graphs of 3x - y^2 = 12 and y = -3
inessss [21]

Answer:

(7,-3)

Step-by-step explanation:

y = -3

substitute in the first equation

3x - y^2 = 12

3x - (-3)^2 = 12

3x - 9 = 12

3x = 12 + 9

3x = 21

x = 7

coordinates of intersection (7,-3)

3 0
2 years ago
Class Size
TEA [102]
I would go with C because if you do A then its all new students and thats one view D is the same. C seems like the best choice.
6 0
3 years ago
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