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Oliga [24]
3 years ago
9

Solve for x. Write the smaller solution first, and the larger solution second. (x -4)(-5x +1)=0

Mathematics
2 answers:
Vesnalui [34]3 years ago
4 0

The product of the two is 0, so one of them have to equal 0 as any number multiplied by 0 is 0.

First solution: x - 4 = 0

If x - 4 = 0, then x = 4. So the first solution for <em>x </em>is 4.

Second Solution: -5x + 1 = 0

Solving...

-5x + 1 = 0

-5x = -1

x = -1/-5

x = 1/5 or 0.2


So x = 0.2 and 4

Liula [17]3 years ago
4 0

Answer: smaller x= 1/5

Larger x=4

Step-by-step explanation:

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What are the roots of x^3-8=0?
algol [13]

Answer:

hello : x = 2

Step-by-step explanation:

note : a^3 = b^3  : a=b

x^3-8=0

x^3=8

x^3= 2^3

so : x=2

7 0
3 years ago
You are curious about the average number of yards Matthew Stafford throws for each game for the Detroit Lions. You randomly sele
Damm [24]

Answer:

The margin of error for this estimate is of 14.79 yards per game.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

T interval

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 20 - 1 = 19

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 19 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.093

The margin of error is:

M = T\frac{s}{\sqrt{n}}

In which s is the standard deviation of the sample and n is the size of the sample.

You randomly select 20 games and see that the average yards per game is 273.7 with a standard deviation of 31.64 yards.

This means that n = 20, s = 31.61

What is the margin of error for this estimate?

M = T\frac{s}{\sqrt{n}}

M = 2.093\frac{31.61}{\sqrt{20}}

M = 14.79

The margin of error for this estimate is of 14.79 yards per game.

3 0
3 years ago
PLEASEEEE HELP MEEEEEEEEEE
umka21 [38]
Answer:
should be A. 5x+2
7 0
3 years ago
Evaluate the expression 9x , when x= 4, 7, and 2.5
satela [25.4K]

Step-by-step explanation:

When x = 4,

9x=9×4=36

When x = 7,

9x = 9×7 =63

When x = 2.5

9x = 9×2.5 = 23.5

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5 0
3 years ago
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Answer:

I don't understand what you are trying to ask? Sorry

5 0
3 years ago
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