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2 years ago

The price of an item has been reduced by $3.05. The original price was $69.54. What was the price now?

Mathematics

1 answer:

zavuch27 [327]2 years ago

5 0

Answer:

$66.49

Step-by-step explanation:

subtract

69.54 - 3.05

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3. Suppose the mystery bag had resulted in the following number of red chips. Using the simulated sampling distributions found e

Vinvika [58]

Answer:

a) 0.172

b) 0.167

c) 0.1404

Step-by-step explanation:

Margin of error, E = $2\times\sqrt{\frac{p(1-p)}{n}}$

here,

p = probability of the event

n = sample size

a) n = 30

p = 10 ÷ 30 = 0.333

Therefore,

E = $2\times\sqrt{\frac{0.333(1-0.333)}{30}}$

= 2 × 0.0861

= 0.172

b) n = 30

p = 21 ÷ 30 = 0.7

Therefore,

E = $2\times\sqrt{\frac{0.7(1-0.7)}{30}}$

= 2 × 0.0836

= 0.167

c) n = 30

p = 22 ÷ 50 = 0.44

Therefore,

E = $2\times\sqrt{\frac{0.44(1-0.44)}{50}}$

= 2 × 0.0702

= 0.1404

3 0

2 years ago

A bookstore sells cookbooks, novels and reference books. The ratio of the number of

Elena-2011 [213]

Step-by-step explanation:

<h3> cookbooks : novels </h3><h3> 2 : 11 </h3><h3> So 6 : 33 </h3>

<h3> cookbooks : reference books </h3><h3> 3 : 4 </h3><h3> So 6 : 8 </h3>

novels : cookbooks : reference books

7 0

1 year ago

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Does (9,8) make the inequality y < 10×+8 true

ExtremeBDS [4]

Answer:

Yes, the point makes the inequality true

Step-by-step explanation:

y < 10x+8

Substitute x =9 and y=8 into the inequality

8 < 10*9+8

8<90+8

8<98

This is true so the point makes the inequality true

7 0

3 years ago

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A certain test preparation course is designed to help students improve their scores on the GRE exam. A mock exam is given at the

Westkost [7]

Answer:

(0.25 ; 21.75)

8.7 (1 decimal place)

Step-by-step explanation:

Net change in scores : X = 6,14,12,23,0

Sample mean, xbar = (6 + 14 + 12 + 23 + 0) /5 = 55 /5 = 11

Sample standard deviation, s = 8.66 ( from calculator)

Sample standard deviation = 8.7( 1 decimal place)

Sample size, n = 5

The 95% confidence interval; we use t, because n is small

Tcritical at 95%, df = 4 - 1 = 3 ; Tcritical = 2.776

Xbar ± standard Error

Standard Error = Tcritical * s/√n

Standard Error = 2.776 * 8.66/√5

Standard Error = 10.751086 = 10.75

Lower boundary = (11 - 10.75) = 0.25

Upper boundary = (11 + 10.75) = 21.75

(0.25 ; 21.75)

The

8 0

1 year ago

Help me 2x-4y-3(7x-2y)

Zinaida [17]

Let's simplify the above expression :

$2x - 4y - 3(7x - 2y)$

$2x - 4y - 21x + 6y$

$- 19x + 2y$

4 0

2 years ago

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