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Art [367]
3 years ago
7

Solve x^2 - 13x + 40 = 0​

Mathematics
1 answer:
hodyreva [135]3 years ago
4 0

Answer:

(x-8)(x-5)

Step-by-step explanation:

The only way to solve this equation is to factor it. You would have to use the sum and product rule.

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Last year, the mean running time for a certain type of light bulb was 8.5 hours. This year, the manufacturer has introduced a ch
Free_Kalibri [48]

Answer:

H0 : μ = 8.5

H1 : μ > 8.5

1 sample t test ;

Test statistic = 2.53

Pvalue = 0.994

No, we fail to reject the Null ;

There is no significant evidence to support the Claim that the mean running time of light bulb is greater Tha last year.

Step-by-step explanation:

H0 : μ = 8.5

H1 : μ > 8.5

Test statistic :

(xbar - μ) ÷ (s/sqrt(n))

(8.7 - 8.5) ÷ (0.5 / sqrt40)

Test statistic = 2.53

The Pvalue :

P(Z < 2.53) = 0.9943

Pvalue = 0.994

Decison region :

Reject H0 ; if Pvalue < α

0.9943 > 0.05 ; We fail to reject the Null

5 0
3 years ago
Evaluate this expression by distributing the multiplication over division: 5 x (7+4)
Maru [420]

Answer:

I think you can write like this:

5 x (5+2+4)

OR

5 x 11

Step-by-step explanation:

My own knowladge

Hope it helps

Put a thanks

Thank you

6 0
3 years ago
A cookie has 130 calories.
pychu [463]
I think the answer would be B
5 0
3 years ago
Desi says that there are more ounces in 1 t than there are pounds. Do you agree?
Alenkinab [10]

Answer: Yes, I agree.

Step-by-step explanation: I Agree to this because there are 2,00 pounds in 1 ton, But there are 32,000 ounces in 1 ton.

5 0
3 years ago
joe boght 15 tolets. 1 was pure gold 2 were pure silver and the rest were wooden. how many wooden toilets were there?
borishaifa [10]
12.
It is easy all you have to do is 15-3 because 1+2=3
3 0
2 years ago
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