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3 years ago

Suppose that 22 inches of wire costs 66 cents.

Mathematics

1 answer:

GaryK [48]3 years ago

8 0

Answer:

51 cents for 17 inches of wire

Step-by-step explanation:

22 = 66

17 = x

22x = 66 * 17

22x = 1122

x = 51 cents

22 inches costs 66 cents

1 inch costs 3 cents (66 / 22 = 3 cents)

17 inches costs 51 cents (17 * 3 = 51 cents)

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Sara had 39 peaches and 25 pears left at her roadside fruit stand. She went to the orchard and picked more to stock up the stand

Maksim231197 [3]

Answer:

Sara picked 48 peaches.

Step-by-step explanation:

Sara originally had 39 peaches, but after picking more, she had 87 peaches.

If x is the number of peaches she picked, then:

x + 39 = 87

x = 48 peaches

3 0

3 years ago

A sample of 100 is drawn from a population with a proportion equal to 0.50. Determine the probability of observing between 43 an

diamong [38]

Answer:

The probability of observing between 43 and 64 successes=0.93132

Step-by-step explanation:

We are given that

n=100

p=0.50

We have to find the probability of observing between 43 and 64 successes.

Let X be the random variable which represent the success of population.

It follows binomial distribution .

Therefore,

Mean, $\mu=np=100\times 0.50=50$

Standard deviation , $\sigma=\sqrt{np(1-p)}$

$\sigma=\sqrt{100\times 0.50(1-0.50)]$

$\sigma=5$

Now,

$P(43\leq x\leq 64)=P(42.5\leq x\leq 64.5)$

$P(42.5\leq x\leq 64.5)=P(\frac{42.5-50}{5}\leq Z\leq \frac{64.5-50}{5})$

$=P(-1.5\leq Z\leq 2.9)$

$P(42.5\leq x\leq 64.5)=P(Z\leq 2.9)-P(Z\leq- 1.5)$

$P(42.5\leq x\leq 64.5)=0.99813-0.06681$

$P(43\leq x\leq 64)=0.93132$

Hence, the probability of observing between 43 and 64 successes=0.93132

4 0

3 years ago

The base of a rectangular solid is 4ft. long and 3ft. wide. What is the volume of the solid if its diagonal is sqrt of 41 ft.?

geniusboy [140]

The diagonal of the figure forms a right angle triangle with the diagonal of the base and the height of the figure.
Diagonal of base = √(3² + 4²)
= 5ft
Diagonal of solid² = Diagonal of base² + height²
height = √((√41)² + 5²)
height = 8.12 feet
Volume = width x length x height
Volume = 3 x 4 x 8.12
= 97.44 cubic feet

8 0

3 years ago

Z varies jointly with x, and y, and z=7 when x= 2, y= 2<br> pleasee I need an answer now!!

Elina [12.6K]

Answer:

(7/4)(2)(2)=7

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

WILL GIVE BRAINLIEST ANSWER THIS PLZ!

Nutka1998 [239]