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sveta [45]
3 years ago
14

a normal distribution pf data has a mean of 15 and a standard deviation of 4 how many standard deviations from the mean is 25

Mathematics
2 answers:
LuckyWell [14K]3 years ago
8 0
What were your given answer choices
marin [14]3 years ago
5 0

Answer:

c 2.5

Step-by-step explanation:

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One alloy is 2 parts iron to 3 parts silver and another alloy is 7 parts iron to 3 parts silver. How much of each should be comb
Shalnov [3]
Let x be your first alloy
2/5x+7/10(30-x)=1/2(30)
4x+210-7x=150
3x=60
x=20
So, you need 20 lbs of the first alloy, and 10 parts of the second to make 30 lbs of half iron and half silver alloy!
8 0
3 years ago
In two or more complete sentences, explain how to use ordered pairs of points in x) = 2x + 5 and g(x)=
Naddika [18.5K]

Answer:

see the explanation

Step-by-step explanation:

we have

A(x)=2x+5

Find the inverse of A(x)

Let

y=A(x)

y=2x+5

Exchange the variables x for y and y for x

x=2y+5

Isolate the variable y

2y=x-5

y=\frac{x-5}{2}

Let

g(x)=y

g(x)=\frac{x-5}{2} ------> function inverse of A(x)

<em>Explanation</em>

For x=1

Find the value of A(x)

A(1)=2(1)+5=7

The point (1,7) is a solution for A(x)

That means-----> The point (7,1) is a solution for the function inverse g(x)

Verify

For x=7

g(7)=\frac{7-5}{2}=1

The point (7,1) is a solution for g(x)

therefore

A(x) and g(x) are inverses of each other if the point (x,y) is a solution of A(x) and the point (y,x) is a solution of g(x)

8 0
3 years ago
Find the x and y intercepts of -5x+y=10
liubo4ka [24]

Answer:

x-int: (2, 0)

y-int: (0, -5)

To find the x-intercept, substitute in 0 for y.

To find the y-intercept, substitute in 0 for x.

hope this helps please make mine the brainliest

7 0
3 years ago
Can someone help please?!! Major Help Pic above
Mila [183]
I believe it’s c. I hope that this is helpful!
8 0
3 years ago
If p(x) = x 3 + x 2+ root 5 x + root 5 , then find p( – 5 )
Morgarella [4.7K]

Answer:

-100-4√5

Step-by-step explanation:

Given the polynomial expression

p(x) = x³+x²+√5x + √5

p(-5) = (-5)³+(-5)² + √5(-5) + √5

p(-5) = -125 + 25 -5√5 + √5

p(-5) = -100-4√5

This gives the required answer

6 0
3 years ago
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