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3 years ago

Find the value of x and y

Mathematics

1 answer:

AleksandrR [38]3 years ago

8 0

Answer:

x=55 y=62.5

Step-by-step explanation:

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Which is equivalent to 3 square foot of 8 1/4 x

Oxana [17]

$( \sqrt[3]{8}) \frac{1}{4} x = 8 \frac{1}{3} \frac{1}{4} x = 8 \frac{1}{12} x = ( \sqrt[12]{8}$

6 0

3 years ago

US consumers are increasingly using debit cards as a substitute for cash and checks. From a sample of 100 consumers, the average

scoray [572]

Answer:

A. Margin of error = 128.79

B. The 99% confidence interval for the population mean is (7661.21, 7918.79).

Step-by-step explanation:

We have to calculate a 99% confidence interval for the mean.

The population standard deviation is know and is σ=500.

The sample mean is M=7790.

The sample size is N=100.

As σ is known, the standard error of the mean (σM) is calculated as:

$\sigma_M=\dfrac{\sigma}{\sqrt{N}}=\dfrac{500}{\sqrt{100}}=\dfrac{500}{10}=50$

The z-value for a 99% confidence interval is z=2.576.

The margin of error (MOE) can be calculated as:

$MOE=z\cdot \sigma_M=2.576 \cdot 50=128.79$

Then, the lower and upper bounds of the confidence interval are:

$LL=M-t \cdot s_M = 7790-128.79=7661.21\\\\UL=M+t \cdot s_M = 7790+128.79=7918.79$

The 99% confidence interval for the population mean is (7661.21, 7918.79).

8 0

3 years ago

Find two consecutive integers such that 3 times larger exceeds twice the smaller by 34

Katen [24]

Answer:

x - a smaller number

(x+1) - a larger number

3(x+1) - 2x = 34

3x + 3 - 2x = 34

x= 31

(x+1) = 32

Step-by-step explanation:

7 0

3 years ago

Help meeeeeeeeeee I need help please please please please please please please please please please please

Kamila [148]

Its 1 = 5 im pretty sure

6 0

4 years ago

In which pair do both decimals represent rational numbers?

aleksandr82 [10.1K]

Answer:

Option b

step by step explanation:

5 0

3 years ago

Read 2 more answers