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dolphi86 [110]
3 years ago
7

Find a number that is 15 more than 4 times its opposite

Mathematics
1 answer:
V125BC [204]3 years ago
5 0
x-\ number\\\\
x-15=4(-x)\\\\
x-15=-4x\ \ \ \ |subtract\ x\\\\
-15=-5x\ \ \ \ |divide\ by\ -5\\\\
x=3\\\\Number\ is\ equal\ to\ 3.
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On a test that has a normal distribution, a score of 60 falls two standard deviations above the mean, and a score of 42 falls on
Sergeu [11.5K]

Answer:

48

Step-by-step explanation:

Given that:

A  \ score  \ of \  60  \ falls \  two  \ standard   \ deviations \  above \  the \ mean \\ \\ A \  score \ of \ 42  \ falls \  one  \ standard  \ deviation \ below  \ the \ m ean

The interval for score = 60 - 42 = 18

If we divide it by the 3 standard deviations; the interval result into

= 18/3

= 6

So, the standard deviation is 6, and the mean = 42 + 6

= 48

7 0
2 years ago
Read 2 more answers
If g(x)=f(x+1), then g(x) translates the function f(x) 1 unit _[blank]_.
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4 0
3 years ago
Find the distance between xequals[Start 2 By 1 Matrix 1st Row 1st Column 8 2nd Row 1st Column negative 5 EndMatrix ]and yequals[
kherson [118]

Answer:

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Step-by-step explanation:

The Matrix X and Y could also be referred to as vectors in Rⁿ dimensions.

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then, Distance (X-Y) = ||X-Y|| = √(x₁ - y₁)²+ (x₂ - y₂)²

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Distance = √(8 - (-1))²+ (-5 - (-9))² = √9² + 4² =√97 = 9.85

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IgorLugansk [536]

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Step-by-step explanation:

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3 years ago
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storchak [24]

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Step-by-step explanation:

3x+3(x+y)= 3x+3x+3y=6x+3y

6 0
3 years ago
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