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Lunna [17]
3 years ago
11

Sara bought an $11 mop and 6 sponges. She spend a total of $20. Each sponge coat the same amount. Write an equation that can be

used to find x, the cost in dollars, of each sponge
Mathematics
1 answer:
Reptile [31]3 years ago
4 0

Answer:

6x+11=20

x= 1.5

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Sales of a new line of athletic footwear are crucial to the success of a company. The company wishes to estimate the average wee
MariettaO [177]

Answer:

188 weeks of data must be sampled.

Step-by-step explanation:

From the information given, we can deduce that:

The Margin of error is within = 200

The confidence interval = 95%

The level of significance = 1 - C.I

= 1 - 0.95

= 0.05

The standard deviation = 1400

The number of weeks the data must be sampled can be determined by using the formula for sample size which is:

n =( \dfrac{Z_{\alpha/2} \times \sigma}{E} )^2

n =( \dfrac{Z_{0.05/2} \times 1400}{200} )^2

n =( \dfrac{1.96 \times 1400}{200} )^2

n =( \dfrac{2744}{200} )^2

n =( 13.72)^2

n = 188.24

n ≅ 188

Thus, 188 weeks of data must be sampled.

6 0
2 years ago
Do you guys know this
romanna [79]

Answer && Step-by-step explanation:

Simple plug and chug

we know a+b == 6 so replace the set as 6 so:

2(6)+6/6+(6)^2-2

12+1+36-2

49-2

==47

5 0
2 years ago
The area of a circular place is 45 square inches.estimate the radius to the nearest integer
geniusboy [140]
A = π*r^2
r = √(A/π) = √(45/π) ≈ 3.78

The radius is approximately 4 inches.
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3 years ago
PLEASE HELP! FUNCTIONS
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Answer: 7

Step-by-step explanation:

5 0
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Name the property of real numbers illustrated by the equation 2*(√8*7)=(2*√8)*7
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Associative property of mulipication, the ability to move parenthasees with mltipication or additon
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