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2 years ago

What value is equivalent to 8 · 9 − 2 · 5? A) 62 B) 82 C) 280 D) 350

Mathematics

2 answers:

garik1379 [7]2 years ago

8 0

The answer of the question is a 62

Nesterboy [21]2 years ago

4 0

Answer:

the answer to this is a, 62

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Of 97 adults selected randomly from one city, 63 have health insurance. Create a 95% confidence interval for the true proportion

Flura [38]

Answer: 95% confidence interval would be (0.555,0.745).

Step-by-step explanation:

Since we have given that

n = 97

x = 63

So, we get that

$\hat{p}=\dfrac{x}{n}=\dfrac{63}{97}=0.65$

At 95% confidence interval , z = 1.96

so, Margin of error would be

$z\times \sqrt{\dfrac{p(1-p)}{n}}\\\\=1.96\times \sqrt{\dfrac{0.65\times 0.35}{97}}\\\\=0.095$

So, interval would be

$p\pm 0.095\\\\=0.65\pm 0.095\\\\=(0.65-0.095,0.65+0.095)\\\\=(0.555,0.745)$

Hence, 95% confidence interval would be (0.555,0.745).

5 0

2 years ago

The perimeter of a square of side 5 cm is 25 cm. O True O Falsethe perimeter of a circle

larisa [96]

Answer:

false

Step-by-step explanation:

I would assume false as if each of the fours sides of the square are 5 cm, then doing the equation 5×4 (unsing 4 for the each of the congruent sides) would give up 20 cm.

4 0

2 years ago

What is the cosine of angle F A. 4/5 B. 3/4 C. 5/4 D. 3/5

saveliy_v [14]

Answer: option D

Step-by-step explanation:

Remember the cosine identity:

$cos\alpha=\frac{adjacent}{hypotenuse}$

Given the right triangle DFE shown in the image, you can identify that the adjacent side and the hypotenuse for the angle F of this triangle are:

$adjacent=15\\hypotenuse=25$

Now you can substitute values into $cos\alpha=\frac{adjacent}{hypotenuse}$ and then reduce the fraction.

THerefore you get: $cos(F)=\frac{15}{25}\\\\cos(F)=\frac{3}{5}$

6 0

2 years ago

Read 2 more answers

Origin, one of the four characteristics of mapping rules, refers to _____. the use of a number that is not used again the use of

labwork [276]

Answer:

the use of a series of numbers with a unique origin indicated by the number zero.

Step-by-step explanation:

In Science, mapping experiment refers to an investigation which typically involves the process of manipulating an independent variable (the cause) in order to be able to determine or measure the dependent variable (the effect).

This ultimately implies that, an experiment can be used by scientists to show or demonstrate how a condition causes or gives rise to another i.e cause and effect, influence, behavior, etc in a sample.

Origin, one of the four characteristics of mapping rules, refers to the use of a series of numbers with a unique origin indicated by the number zero.

In Mathematics, the origin is generally chosen to start from zero on a graph that gives the relationship between two variables.

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2 years ago

(a) If a = b = c and a, b, c are in G.P. then prove that x, y, z in H.P.

Oduvanchick [21]

Answer:

neeeeeeeeeeeeeeeeeuuuuuuuuuuuuu58907

Step-by-step explanation:

8 0

2 years ago