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2 years ago

Cheryl spent $45 for three scarves and a bracelet. She knows that the cost of the

Mathematics

2 answers:

3241004551 [841]2 years ago

7 0

Answer:

Привет! Кто-нибудь читал Криспину крест ведущего? Если да, то может ли кто-нибудь дать мне представление о том, как он изменился в этой истории! Спасибо за ваше время!

Step-by-step explanation:

Igoryamba2 years ago

4 0

Answer:

x=(45-15)/3

Step-by-step explanation:

x=scarf price

scarf price= $\frac{45-15}{3}$ = 45-15 ÷ 3

we solve the bracket first so 45-15=30

scarf price= $\frac{30}{3}$ = 30÷3

30÷3= 10

x=10

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5. A store owner has 12.58 kg of candy. If she puts the candy

Solnce55 [7]

Answer:

1.4 kg of candy

Step-by-step explanation:

Divide the amount of candy by the number of jars:

12.58/9

= approx. 1.4

So, each jar will have approximately 1.4 kg of candy

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2 years ago

Which expression gives the distance between the points (2,4) and (-4,8)?

cluponka [151]

(y2-y1)/(x2-x1)=(8-4)/(-4-2)

4 0

3 years ago

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Allied Corporation is trying to sell its new machines to Ajax. Allied claims that the machine will pay for itself since the time

kvasek [131]

Answer:

z(s) is in the acceptance region. We accept H₀ we did not find a significantly difference in the performance of the two machines therefore we suggest not to buy a new machine

Step-by-step explanation:

We must evaluate the differences of the means of the two machines, to do so, we will assume a CI of 95%, and as the interest is to find out if the new machine has better performance ( machine has a bigger efficiency or the new machine produces more units per unit of time than the old one) the test will be a one tail-test (to the left).

New machine

Sample mean x₁ = 25

Sample variance s₁ = 27

Sample size n₁ = 45

Old machine

Sample mean x₂ = 23

Sample variance s₂ = 7,56

Sample size n₂ = 36

Test Hypothesis:

Null hypothesis H₀ x₂ - x₁ = d = 0

Alternative hypothesis Hₐ x₂ - x₁ < 0

CI = 90 % ⇒ α = 10 % α = 0,1 z(c) = - 1,28

To calculate z(s)

z(s) = ( x₂ - x₁ ) / √s₁² / n₁ + s₂² / n₂

s₁ = 27 ⇒ s₁² = 729

n₁ = 45 ⇒ s₁² / n₁ = 16,2

s₂ = 7,56 ⇒ s₂² = 57,15

n₂ = 36 ⇒ s₂² / n₂ = 1,5876

√s₁² / n₁ + s₂² / n₂ = √ 16,2 + 1.5876 = 4,2175

z(s) = (23 - 25 )/4,2175

z(s) = - 0,4742

Comparing z(s) and z(c)

|z(s)| < | z(c)|

z(s) is in the acceptance region. We accept H₀ we did not find a significantly difference in the performance of the two machines therefore we suggest not to buy a new machine

The very hight dispersion of values s₁ = 27 is evidence of frecuent values quite far from the mean

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3 years ago

What is equal to 2/4

Travka [436]

Fractions: 4/8, 1/2

Percent: 50%

Decimal: 0.50

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3 years ago

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A camper wants to know the width of a river. From point A, he walks downstream 60 feet to point B and sights a canoe across the

Anarel [89]

<h2>Hello!</h2>

The answer is:

The correct option is:

D. 40 feet.

To solve the problem and calculate the width of the river, we need to assume that the distance from A to B and the angle formed between that distance and the distance from A to the other point (C) is equal to 90°, meaning that we are working with a right triangle, also, we need to use the given angle which is equal to 34°. So, to solve the problem we can use the following trigonometric relation:

$Tan\alpha =\frac{Opposite}{Adjacent}$