3 years ago

7. Which graph represents a proportional relationship PLEASE HELP ME

Mathematics

1 answer:

Cloud [144]3 years ago

8 0

Answer:

Step-by-step explanation:

It's a relationship

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Multiply. express your anwser in simplist form.. 1 7\8 × 2 1\3

Vera_Pavlovna [14]

Answer:

If not simplified 35/8 if simplified 4 and 3/8.

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3 years ago

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Evan saves 7 dollars each week. let d represents the total amount of money in dollars Evan saves after w weeks.

DerKrebs [107]

D=7
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2 years ago

Which is f(-1) for the function f(x)= 3x^2+9

blsea [12.9K]

Answer:

C. f(-1) =12

Step-by-step explanation:

f(x)= 3x^2+9

Let x=-1

f(-1) = 3(-1)^2 +9

= 3(1)+9

= 3+9

= 12

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3 years ago

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. A retailer buys pants at $22.00 and sells them for $26.40 The percent of markup on cost is 50 percent. 13 percent. 20 percent.

lana [24]

22 = 100%
26,40 = x%

26,4*100/22=120%
x=120%

120%-100%=20%
The answer is 20%

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3 years ago

4. A statistician working for the National Basketball Association supplies the television announcers with interesting statistics

Sonbull [250]

Answer: 0.038

Step-by-step explanation:

Given: Total games : n= 375

Number of games won by the team that was winning the game at the end of the third quarter. = 300

The proportion (p) of the team that was winning the game at the end of the third quarter: $p=\dfrac{300}{375}=0.8$

Critical z-value for 90% confidence: z* = 1.645

Margin of error = $z^*\sqrt{\dfrac{(1-p)p}{n}}$

The margin of error in a 90% confidence interval estimate of p $=1.645\sqrt{\dfrac{0.2\times0.8}{300}}\\= 1.645\times\sqrt{0.00053333}\\\\=1.645\times0.0231\\\\=0.0379995\approx$$0.038$

Hence, the required margin of error = 0.038

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3 years ago