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Nataliya [291]
2 years ago
8

Help please I would be so grateful

Mathematics
1 answer:
aalyn [17]2 years ago
4 0

Answer:

19.625

Step-by-step explanation:

Find the radiu

Radius = Diameter ÷ 2

Radius = 5 ÷ 2 = 2.5 cm

Find the area:

area = πr²

area = 3.14 x 2.5² = 19.625 cm²

Answer: The area is 19.625 cm²

(hope this helps can i plz have brainlist :D hehe)

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CAN YOU HELP WITH THIS ONE QUESTION , JUST TRYING TO GET BACK ON HONOR ROLL !
Ivanshal [37]

Answer:

B. TRUE.

(3, 2) is the intersection point of the graphs of

x + y = 5 and x - y = 1.

Step-by-step explanation:

Option B is TRUE because intersection point should satisfy both the equation

and in option be it comes true.

i.e x = 3  and y = 2 we have

3 + 2 = 5 and  3 - 2 = 1

5 = 5       and    1 = 1

Hence TRUE

A.

(3, 2) is the intersection point of the graphs of

3x + 2y = 5 and 3x - 2y = 1.

i.e x = 3  and y = 2 we have

3×3 + 2×2 = 5 and 3×3 - 2×2 = 1

13 ≠ 5               and 5 ≠ 1

Hence FALSE

C.

(5, 1) is the intersection point of the graphs of

3x + 2y = 5 and 3x - 2y = 1.

i.e x = 5  and y = 1 we have

3×5 + 2×3 = 5 and 3×5 - 2×3 = 1

21 ≠ 5               and  9 ≠ 1

Hence FALSE

D.

(5, 1) is the intersection point of the graphs of

x + y = 5 and x - y = 1.

i.e x = 5  and y = 1 we have

5 + 1 = 5 and 5 - 1 = 1

6 ≠ 5      and 4 ≠ 1

Hence FALSE

6 0
3 years ago
The effectiveness of a blood-pressure drug is being investigated. an experimenter finds that, on average, the reduction in systo
Blizzard [7]

Using the z-distribution, the estimate for how much the drug will lower a typical patient's systolic blood pressure is:

46.6 \leq \mu \leq 48

<h3>What is a z-distribution confidence interval?</h3>

The confidence interval is:

\overline{x} \pm z\frac{\sigma}{\sqrt{n}}

In which:

  • \overline{x} is the sample mean.
  • z is the critical value.
  • n is the sample size.
  • \sigma is the standard deviation for the population.

In this problem, we have a 80% confidence level, hence\alpha = 0.8, z is the value of Z that has a p-value of \frac{1+0.8}{2} = 0.9, so the critical value is z = 1.28.

The other parameters are given by:

\overline{x} = 47.3, \sigma = 15.9, n = 878

Then the bounds of the interval are:

\overline{x} - z\frac{\sigma}{\sqrt{n}} = 47.3 - 1.28\frac{15.9}{\sqrt{878}} = 46.6

\overline{x} + z\frac{\sigma}{\sqrt{n}} = 47.3 + 1.28\frac{15.9}{\sqrt{878}} = 48

Hence the interval is:

46.6 \leq \mu \leq 48

More can be learned about the z-distribution at brainly.com/question/25890103

#SPJ1

7 0
2 years ago
Explain how this method is correct...2 times 3 is 6, and 6 times 5 is 30.
ikadub [295]

Answer:

2+2+2=6 and 6+6+6+6+6=30

Step-by-step explanation:

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3 years ago
In a quadrilateral, consecutive angles and opposite angles are congruent. What is the most specific name of the figure?
ratelena [41]
The four angles are congruet. So each angle is 90°.

So the figure is a rectangle. It could be a square but not necessarily. You can consider a square a special case of rectangle.

The four angles of a rectangle are congruent. And the opposite sides are congruent.

The four angles of a square are congruent. The opposite sides are congruent, furthermore the four sides are congruent.
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3 years ago
Angel runs 4 miles per day.What is the relationship between the number of days and how many miles he has run?
forsale [732]
The answer is D. Ratio. When ever you see “per” another number it’s a ratio.
3 0
3 years ago
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