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LenaWriter [7]
3 years ago
5

If 1 + + 2 + 3 = 60, then the average (arithmetic mean) of , 2 , 3 , and 4 is equal to what

Mathematics
1 answer:
Zielflug [23.3K]3 years ago
3 0

Step-by-step explanation:

1x+2x+3x=60

x=10

2x+3x+4x=20+30+40=90

average=90÷3=30

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Carlos is using the quadratic formula to find the solutions of y=3x^2-5x-2. Which of the following will simplify to the correct
Nana76 [90]

Answer:

Fx=\frac{5\pm\sqrt{25+24} }{6}

Step-by-step explanation:

A quadratic equation in one variable given by the general expression:

ax^2+bx+c

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a\neq 0

The roots of this equation can be found using the quadratic formula, which is given by:

x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}

So:

y(x)=3x^2-5x-2=0

As you can see, in this case:

a=3\\b=-5\\c=-2

Using the quadratic formula:

x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}=\frac{-(-5)\pm\sqrt{(-5)^2-4(3)(-2)} }{2(3)}=\frac{5\pm\sqrt{25+24} }{6}

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Fx=\frac{5\pm\sqrt{25+24} }{6}

4 0
3 years ago
Subtract the following polynomials
Olegator [25]

Answer:

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Simplify each term.

q²+8−4q²−1

Simplify by adding terms.

−3q²+7

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3x+7x²−6−5x²−x−9

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Step-by-step explanation:

4 0
2 years ago
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How many counting numbers have three distinct nonzero digits such that the sum of the three digits is 7?​
SOVA2 [1]

Answer:

6

Step-by-step explanation:

You have 2 conditions.

1. The digits must be different.

2. The digits must add to 7.

There aren't very many

124

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214

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That's it. That's your answer. There are 6 of them

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3 years ago
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21.5, just took the test!!!!
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lesya [120]

x + 1 = -x + (-5)

2x + 1 = -5

2x = -6

x = -3

4 0
2 years ago
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