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Mariana [72]
3 years ago
8

May I please Get some help?

Mathematics
1 answer:
chubhunter [2.5K]3 years ago
5 0
<span>The answer is:
</span>a. a greater curve
Thanks for choosing brainly and let me know if you have any questions, hope you have a great day!
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The faucet drips 6 ¾ gallons of water in 4 hours<br><br> what is the unit rate?
Finger [1]

Answer:

1.6875 gallons per hour

Step-by-step explanation:

6 0
2 years ago
Use the grouping method to factor this polynomial.
tankabanditka [31]

Answer:

C

Step-by-step explanation:

Given

x³ + 3x² + 3x + 9 ( factor first/second and third/fourth terms )

= x²(x + 3) + 3(x + 3) ← factor out (x + 3) from each term

= (x² + 3)(x + 3) → C

5 0
3 years ago
Ethan ordered 4 sub sandwiches for a party. Each 1/2 sandwich is one serving. Does he have enough to serve 7 friends? How much i
Dima020 [189]
Yes because there is 12
4 0
3 years ago
Amanda bought 4 shirts and 9 skirts for $168.75. On another day she bought 3 shirts and 12 skirts for $172.50. How much did she
Karolina [17]

Answer:shirt = $22.5

skirt= $8.75

Step-by-step explanation:

Let shirt be x and skirt be y

4x + 9y = 168.75--------1

3x + 12y = 172.5---------2

Using elimination method

Multiply eqn 1 by 3 and eqn 2 by 4

12x + 27y= 506.25

12x + 48y = 690

Subtracting

-21y = -183.75

y = $8.75

Put in eqn 1

4x + 9×8.75 = 168.75

4x = 168.75 - 78.75

4x = 90

x = $22.5

3 0
2 years ago
A survey of data base administrators is conducted. In a random sample of equation, n=150, x=63 of them were found to have over 1
Inessa [10]

Answer:

Step-by-step explanation:

Sample proportion is x/n

Where

p = probability of success

n = number of samples

p = x/n = 63/150 = 0.42

q = 1 - p = 1 - 0.42 = 0.58

To determine the z score, we subtract the confidence level from 100% to get α

Since 1 - α = 0.9

α = 1 - 0.9 = 0.1

α/2 = 0.1/2 = 0.05

This is the area in each tail. Since we want the area in the middle, it becomes

1 - 0.05 = 0.95

The z score corresponding to the area on the z table is 1.645. Thus, confidence level of 90% is 1.645

Confidence interval is written as

(Sample proportion ± margin of error)

Margin of error = z × √pq/n

= 1.645 × √(0.42 × 0.58)/150

= 0.066

The lower end of the confidence interval is

0.42 - 0.066 = 0.354

The upper end of the confidence interval is

0.42 + 0.066 = 0.486

Therefore, the answers to the given questions are

1) d. 0.42

2) the quantity after the ± is the half width. It is also the margin of error. Thus

The half width of this confidence interval is closest to

d. 0.0663

3) c.0.3537

4) b.0.4863

5) d.With 90% confidence, 0.3537 < p < 0.4863

7 0
3 years ago
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