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adelina 88 [10]
3 years ago
11

A bike and helmet worth $320. The bike is 7 times more than helmet. Find the value

Mathematics
2 answers:
Yuliya22 [10]3 years ago
7 0

The Bike costs $45.71

mojhsa [17]3 years ago
3 0

The answer is $2,250 :)

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Elan Coil [88]

Answer:

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3 years ago
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A grocery store has an average sales of $8000 per day. The store introduced several advertising campaigns in order to increase s
Ann [662]

Answer:

a) Z= 0.0228

b) based on the critical value, it is a one tailed test

c) Since the p-value is less than the level of significance (α= 0.05) so we reject the null hypothesis.

This implies that the advertising campaign has been effective in increasing sales.

Step-by-step explanation:

The null hypothesis is H₀ : µ = 8000

The alternative hypothesis is H₁ : µ ˃ 8000

Mean (µ) = 8000

Standard deviation (σ) = 1200

n = 64

We will use the Z test to test the hypothesis

Z = (X - µ)/ (σ/√n)

Z = (8300 – 8000)/ (1200/√64)

Z = 300/ (1200/8)

Z = 300/ 150

Z= 2

From the normal distribution table,

2 = 0.4772

Φ(z) = 0.4772

Since Z is positive,

P(x˃a) =0.5 - Φ(z)

= 0.5 – 0.4773

= 0.0228

The required P-value = 0.0228

The P-value of one tail Z test at α= 0.05 level of significance

P-value = p(Z˃2.5)

= 0.0228

Since the p-value is less than the level of significance (α= 0.05) so we reject the null hypothesis.

This implies that the advertising campaign has been effective in increasing sales.

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2 years ago
HURRY I NEED HELP!!!!!
Daniel [21]

Answer:

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A person lost in an office building travels up 3 floors in an
soldier1979 [14.2K]

Answer:

B. +3 - 1 + 5 - 4

Step-by-step explanation:

The plus means going up and the negative means you are going down.

You are going up 3 floors (+3)

You are going down 1 floor ( -1)

You are going up 5 floors (+5)

You are going down 4 floors (-4)

Let me know if this helps!

6 0
3 years ago
Please help explanation need it ?
ahrayia [7]

Answer:

Sin(?)=35/48

?=Sin^-1(35/48)

?=46.82

<u>? ≈ 47</u>

<u>OAmalOHopeO</u>

6 0
3 years ago
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