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Bas_tet [7]
3 years ago
10

If the value of y value directly with x, which function represents the relationship between x and y when x=3 and y=21?

Mathematics
1 answer:
Jet001 [13]3 years ago
8 0

Answer:

y

=

2

9

x

Explanation:

If  

y

varies directly with  

x

then

XXX

y

=

k

⋅

x

for some constant  

k

Given  

x

=

30

→

y

=

20

3

implies

XXX

20

3

=

k

⋅

30

XXX

→

k

=

20

3

30

=

20

90

=

2

9

Step-by-step explanation:

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Last year, Leron worked 8 hours a day,5 days a week, for 50 weeks. He earned $28 per hour. How much dd he earn for the entire ye
pickupchik [31]
28(8) = 224

224(5) = 1,120

1,120(50) = 56,000

Answer: 56,000
5 0
3 years ago
Midway through the fundraiser, Mrs Little, the sponsor, discovers a container of buttermilk in the back of the fridge. It has 6
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Answer: 6 recipes

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3 years ago
The 7 in 72 represents how many times the value of the 7 in 78 is what ?
earnstyle [38]

Answer:

One time

Step-by-step explanation:

In both the numbers 72 and 78, the place value of 7 is 70.

Hence, 7 in 72 represents one time the value of the 7 in 78.

7 0
3 years ago
Find the slope of the line that passes through the points (-6,-8) and (-6,12)
yulyashka [42]

Answer:

Undefined

Step-by-step explanation:

m = Δy / Δx

m = (12 − -8) / (-6 − -6)

m = 20 / 0

m = undefined

The slope is undefined.

5 0
3 years ago
Read 2 more answers
A survey is planned to estimate the proportion of voters who support a proposed gun control law. The estimate should be within a
laila [671]

Complete Question

A survey is planned to estimate the proportion of voters who support a proposed gun control law. The estimate should be within a margin of error of ±5% with 90% confidence, and we do not have any prior knowledge about the proportion who might support the law. How many people need to be included in the sample?

Round your answer up to the nearest integer.

sample size = _____

Answer:

The sample size is n = 271    

Step-by-step explanation:

From the question we are told that  

   The margin of error is  E = 5% = 0.05

Generally given that there was no prior knowledge about the proportion of who might support the law, we will assume the sample proportion to be  

     \^ p =  0.5

From the question we are told the confidence level is  90% , hence the level of significance is    

      \alpha = (100 - 90 ) \%

=>   \alpha = 0.05

Generally from the normal distribution table the critical value  of  \frac{\alpha }{2} is  

   Z_{\frac{\alpha }{2} } =  1.645

Generally the sample size is mathematically represented as  

    n = [\frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * \^ p (1 - \^ p )

=>   n = [\frac{1.645 }{0.05} ]^2 * 0.5 (1 - 0.5 )

=>   n = 271    

5 0
3 years ago
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