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4 years ago

The second of two numbers is 8 less than twice the first number, what are the two numbers?

2 answers:

5 0

$x\ \ \rightarrow\ \ the\ first\ number\\y\ \ \rightarrow\ \ the\ second\ number\\\\ y=2\cdot x-8\\\\for\ example:\\\\x=-2\ \ \ \Rightarrow \ \ \ y=2\cdot(-2)-8=-4-8=-12\\x=0\ \ \ \Rightarrow \ \ \ y=2\cdot0-8=0-8=-8\\x=7\ \ \ \Rightarrow \ \ \ y=2\cdot7-8=14-8=6\\$

Mashutka [201]4 years ago

3 0

So the two numbers can be represented as x and y

so x is first and y is second

y=2(x)-8

so y=2x-8

IF THEY ARE CONSECUTIVE
If they are consecutive numbers then
x+1=y
subtitute
x+1=2x-8
subtract x from both sides
1=x-8
add 8 to both sides and get
9=x
put it into the equation and get
y=2(9)-8
y=18-8
y=10
so x=9
y=10
IF X AND Y ARE CONSECUTIVE INTEGERS (1,2,3,4 not 2.3 or 1,3,5,8)

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3 years ago

A person's resting heart rate is typically between 60 and 100 beats per minute. Noah looks at his watch, and counts 8 heartbeats

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3 years ago

Approximately how many times greater is 2.3x10^-4 than 1.15x10^-8 ?

Minchanka [31]

Answer:

2.3 × $10^{-4}$ is 20,000 times greater than 1.15 × $10^{-8}$

Step-by-step explanation:

Given as :

The first number= x = 2.3 × $10^{-4}$

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Let The first number is z times greater than second number

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Or, z = $\dfrac{2.3\times 10^{-4}}{1.15\times 10^{-8}}$

Or, z = 2 × $10^{4}$

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4 years ago

If Body temperatures of healthy adults have a bell-shaped distribution with a mean of 98.20°F anda standard deviation of 0.93°F.

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Step 1

Given; If Body temperatures of healthy adults have a bell-shaped distribution with a mean of 98.20°F and a standard deviation of 0.93°F.

Using the empirical rule, what is the approximate percentage of healthy adults with body temperatures between 96.34°F and 100.06°F?

Step 2

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1 year ago

8. A number is of another number. The difference of the numbers is 18. (Assume that you are subtracting the

bezimeni [28]

Answer:

Step-by-step explanation:

"A number is [WHAT?] of another number." It appears the WHAT?? is missing. If it is a word such as "twice," it can be solved in this fashion.

Let the numbers be X and Y, with Y the larger number.

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Use the first equation (Y = 2X) in the second by replacing "Y" with (2X):

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3 years ago