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2 years ago

Find the value of b +9 when b= 72. X

Mathematics

2 answers:

OlgaM077 [116]2 years ago

7 0

Answer:

Step-by-step explanation:

b ÷ 9 when b = 72

b ÷ 9 <== substitute 72 for b, and solve

72 ÷ 9 = 8

Hope this helps!

telo118 [61]2 years ago

3 0

Answer:

Answer = 8

Step-by-step explanation:

first you write out the equation

next you substitute 72 for b

then you divide them to get your answer of 8

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Answer:

Step-by-step explanation:

Multiply both sides of the equation by 8/5.

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Move 16 to the other side

4x=32+16

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3 years ago

The cost of a canoe rental is $15 deposit plus $6 per hour.The total rental cost is

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Answer:

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Step-by-step explanation:

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3 years ago

Six different second-year medical students at Bellevue Hospital measured the blood pressure of the same person. The systolic re

Yanka [14]

Answer:

$Range=14$

$\sigma^2 =32.4$

$\sigma = 5 .7$

The standard deviation will remain unchanged.

Step-by-step explanation:

Given

$Data: 136, 129, 141, 139, 138, 127$

Solving (a): The range

This is calculated as:

$Range = Highest - Least$

Where:

$Highest = 141; Least = 127$

So:

$Range=141-127$

$Range=14$

Solving (b): The variance

First, we calculate the mean

$\bar x = \frac{1}{n} \sum x$

$\bar x = \frac{1}{6} (136+ 129+ 141+ 139+ 138+ 127)$

$\bar x = \frac{1}{6} *810$

$\bar x = 135$

The variance is calculated as:

$\sigma^2 =\frac{1}{n-1}\sum(x - \bar x)^2$

So, we have:

$\sigma^2 =\frac{1}{6-1}*[(136 - 135)^2 +(129 - 135)^2 +(141 - 135)^2 +(139 - 135)^2 +(138 - 135)^2 +(127 - 135)^2]$

$\sigma^2 =\frac{1}{5}*[162]$

$\sigma^2 =32.4$

Solving (c): The standard deviation

This is calculated as:

$\sigma = \sqrt {\sigma^2 }$

$\sigma = \sqrt {32.4}$

$\sigma = 5 .7$ --- approximately

Solving (d): With the stated condition, the standard deviation will remain unchanged.

5 0

3 years ago

James puts $3,500 into a savings account that earns 2.5% simple interest. He does not touch that account for 3 years. What would

miskamm [114]

Given :

James puts $3,500 into a savings account that earns 2.5% simple interest.

He does not touch that account for 3 years.

To Find :

The new balance of the account be after 3 years.

Solution :

Interest on $3500 after 3 years is :

$I = \dfrac{P_o\times r\times t}{100}\\\\I = \dfrac{3500\times 2.5\times 3}{100}\\\\I = \$262.5$

So, new balance of the account after 3 years is $( 3500+262.5 ) = $3762.5 .

Hence, this is the required solution.

3 0

3 years ago