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Arturiano [62]
3 years ago
10

Eight values have a mean of 7. a ninth value is added. the new mean is 9. what is the new value

Mathematics
1 answer:
My name is Ann [436]3 years ago
4 0

Answer:

25 because the 8 values must times with 7 and will get 56. when the ninth value added , let the ninth value as y , 56+y , the new mean is 9 . so it will be like this , 56+y over 9 times with 9

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Which quadratic equation is equivalent to (x + 2)2 + 5(x + 2) – 6 = 0?
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ax^2+bx+c=0

so distribute and stuff and simplify
remember
a(b+c)=ab+ac

(x+2)^2+5(x+2)-6=0
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3 0
3 years ago
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Minimize Q=x^2+2y^2, where x+y=3
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6 0
3 years ago
Select all that apply.
Lelechka [254]

Answer: The second option and the third option are true.

Step-by-step explanation:

The formula of the line in slope-intercept form is:

y=mx+b

Where <em>m </em>is the slope and <em>b </em>is the y-intercept.

By definition, the y-intercept in a direct variation is 0.

Therefore, substituting m=-3 and b=0 into the equation, you obtain:

y=-3x+0

Then, the equation is:

y=-3x

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Therefore, the second option and the third option are true.

8 0
3 years ago
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svetlana [45]

Answer:

x= 1

Step-by-step explanation:

Solve

Let's solve your equation step-by-step.

4x−2=2x

Step 1: Subtract 2x from both sides.

4x−2−2x=2x−2x

2x−2=0

Step 2: Add 2 to both sides.

2x−2+2=0+2

2x=2

Step 3: Divide both sides by 2.

2x

2

=

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8 0
3 years ago
X * 4 = x + 1.5 = help plzzzzzz!
Leona [35]

Answer:

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-- --

3 3

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// have a great day //

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3 years ago
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