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2 years ago

C

Mathematics

2 answers:

jenyasd209 [6]2 years ago

5 0

Answer:

Paul can afford 2 pizzas

Step-by-step explanation:

Equation: 26 = 3 + 8x

Solve for x

26 - 3 = 23

8x = 23

23/8 = 2.875

Round down because he can't buy half a pizza

2 pizzas

Elden [556K]2 years ago

4 0

Answer:

Paul can buy the pizza with 15 dolars left

step-by-step explanation:

8+3=11

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What is the product ?

Aneli [31]

Answer: 25x^2 - 1^2

Explanation:

(5x+1) (5x-1)

(5x)^2 - 1^2

25x^2 - 1^2

7 0

1 year ago

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Extreme cold and hot temperatures are known to affect the operation of electronic components. Winter is approaching and you are

Musya8 [376]

Answer:

A 95% confidence interval for the true mean minimum temperature that will damage an iPod is between 2.55°F and 7.45°F

Test statistic(Z) = 2.31

P-value = 0.0104

Step-by-step explanation:

Step 1

Null hypothesis: The average damaging temperature of nine iPods is 5°F

Alternate hypothesis: The average damaging temperature of nine iPods differs from 5°F

Step 2

Mean=5°F, Sd=3, df=n-1=9-1=8

The t-value corresponding to 8 degrees of freedom and 95% confidence level (5% significance level) is 2.306

Confidence Interval(CI) = (mean + or - t×sd/√n)

CI = (5 + 2.306×3/√8) = 5 + 6.918/2.828= 5+2.45=7.45°F

CI = (5 - 2.306×3/√8) = 5-2.45 = 2.55°F

Z = (sample mean - population mean)/(sd÷√n) = (5-2.55)/(3÷√8) = 2.45/1.061 = 2.31

Step 3

Using the standard distribution table, the cumulative area to the left of Z = 2.31 is 0.9896

P-value = 1 - 0.9896 = 0.0104

Step 4

Conclusion: A 95% confidence interval for the true mean minimum temperature that will damage an iPod is between 2.55°F and 7.45°F

7 0

3 years ago

If mZDEC = (12x - 3), mZBCE =

kati45 [8]

Answer:

Step-by-step explanation:

12x - 3 = 180 - (7x - 26) supplementary angles

19x = 209

x = 11

m∠DEC = 12(11) - 3 = 129°

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M∠ADE = 129 - 72 = 57° exterior angle rule

m∠EDB = 180 - 57 = 123° supplementary angles

m∠DBC = 57° corresponding angle to ADE

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2 years ago

What does 45 dividend by 5/11

Galina-37 [17]

Answer:

i think the answer is 99 im not completely sure though

but i hope this helps

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3 years ago

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Kisachek [45]

Answer:

honestly, the graph look totally fine...

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Step-by-step explanation:

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2 years ago