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Sergio039 [100]
2 years ago
6

Find the zeros using the quadratic formula x^2-5x+4=y.

Mathematics
1 answer:
Ber [7]2 years ago
8 0

Answer:

(x-4) (x-1)

Step-by-step explanation:

X-4=0

x=4

X-1=0

X=1

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The difference of two sample means is 22, and the standard deviation of the difference of the sample means is 10. The difference
taurus [48]

Answer:

The 95% confidence interval for the difference of the two populations means is ( 2.4, 41.6)

Step-by-step explanation:

Confidence intervals are usually constructed using the formula;

point estimate ± margin of error

In this question we are required to construct a 95% confidence interval for the difference of two populations means. The point estimate for the difference of two population means is the difference of their sample means which in this case is 22.

Assuming normality conditions are met, since we have no information on the sample sizes, the margin of error will be calculated as;

margin of error = z-score for 95% confidence * standard deviation of the difference of the sample means

The z-score associated with a 95% confidence interval is 1.96

The standard deviation of the difference of the sample means is given as 10

The 95% confidence interval for the difference of the two populations means is thus;

22 ± 1.96(10) = 22 ± 19.6 = ( 2.4, 41.6)

8 0
3 years ago
Which expression has a positive value?<br> O (-5)(-9)<br> O 2-4<br> O 12+(-4)<br> O-3+(-7)
PolarNik [594]
(-5)(-9) because a negative times a negative equals a positive.
3 0
2 years ago
Read 2 more answers
Keystones tomorrow please explain
masha68 [24]
If I’m not wrong it’s B
7 0
2 years ago
A piece of carpet is 8 feet wide and 12 feet long. The carpet needs to be reduced by a scale factor so that the reduced carpet i
statuscvo [17]

Answer:

\text{Area of reduced carpet}=6\text{ ft}^2

Step-by-step explanation:

We have been given that a piece of carpet is 8 feet wide and 12 feet long. The carpet needs to be reduced by a scale factor so that the reduced carpet is 2 feet wide.

First of all, let us find the scale factor by which the width of carpet has been reduced.

\text{Original width of carpet}\times \text{Scale factor}=2\text{ ft}

\text{8 ft}\times \text{Scale factor}=2\text{ ft}

Dividing both sides by 8 ft we will get,

\frac{\text{8 ft}\times \text{Scale factor}}{\text{8 ft}}=\frac{2\text{ ft}}{\text{8 ft}}

\text{Scale factor}=\frac{1}{4}

Let us find the length of carpet after reduced by a scale factor of \frac{1}{4}.

\text{Length of the carpet after reducing a factor of }\frac{1}{4}=12\text{ ft}\times \frac{1}{4}

\text{Length of the carpet after reducing a factor of }\frac{1}{4}=3\text{ ft}

Now we will multiply the reduced length and width of carpet to find the area of reduced carpet.

\text{Area of reduced carpet}=2\text{ ft}\times 3\text{ ft}

\text{Area of reduced carpet}=6\text{ ft}^2

Therefore, the area of reduced carpet is 6 square feet.

5 0
3 years ago
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I need to know a answer
Mandarinka [93]

The center-radius form of the circle equation is in the format

(x – h)²+ (y – k)² = r²

with the center being at the point (h, k) and the radius being "r"

So, just plug in the (-5,3) and you get:

(x+5)²+(y-3)²=16

6 0
3 years ago
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