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madreJ [45]
2 years ago
15

Name the plane on here

Mathematics
1 answer:
umka21 [38]2 years ago
7 0

Answer:

The answer is A.

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PLEAS HELP ASAP PLEAS 20 points<br> 1 over 3b = 4 over 5. what equals b in this equation?
White raven [17]

Answer:

b = 5/12

Step-by-step explanation:

You have the proportion

1/(3b) = 4/5        

Cross multiply to get rid of the fractions...

5 = 12b                now solve for b

5/12 = b                 (divide by 12 on both sides)

8 0
3 years ago
PLEASE I REALLY NEED HELP&gt; DONT SKIP. NO LINKS PLEASE. BRANLIEST WILL BE GIVEN
LiRa [457]

Answer:

A. 165 ft²

Step-by-step explanation:

volume = (½×5×6) x 11

= 15 × 11

= 165 ft²

8 0
3 years ago
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I think its 210 ≤ t
6 0
3 years ago
A local car dealer claims that 25% of all cars in San Francisco are blue. You take a random sample of 600 cars in San Francisco
Delvig [45]

Answer:

Step-by-step explanation:

a) We would set up the hypothesis test.

For the null hypothesis,

p = 0.25

For the alternative hypothesis,

p ≠ 0.25

b) The test statistic to be used is the z test. The formula is

z = (P - p)/√pq/n

c) Considering the population proportion, probability of success, p = 0.25

q = probability of failure = 1 - p

q = 1 - 0.25 = 0.75

Considering the sample,

Sample proportion, P = x/n

Where

x = number of success = 141

n = number of samples = 600

P = 141/600 = 0.235

Therefore

z = (0.235 - 0.25)/√(0.25 × 0.75)/600 = - 0.85

d) Recall, population proportion, p = 0.25

The difference between sample proportion and population proportion is 0.25 - 0235. = 0.015

Since the curve is symmetrical and it is a two tailed test, the p for the left tail is 0.25 - 0.015 = 0.235

the p for the right tail is 0.25 + 0.015 = 0.265

These proportions are lower and higher than the null proportion. Thus, they are evidence in favour of the alternative hypothesis. We will look at the area in both tails. Since it is showing in one tail only, we would double the area

From the normal distribution table, the area below the test z score in the left tail 0.198

We would double this area to include the area in the right tail of z = 0.85. Thus

p = 0.198 × 2 = 0.396

e) Since alpha, 0.01 < than the p value, 0.396, then we would fail to reject the null hypothesis.

f) In a sample of 600 cars, we would observe a sample proportion of 0.015 or more away from 0.25 about 39.6% of the time by chance alone. Therefore, the sample result is not statistically significant because it could occur in 39.6% of the time by chance alone.

8 0
3 years ago
Analyze Lorena's work to determine which statements are correct. Check all that apply. In Step 1, she correctly distributed –3
12345 [234]

Answer:

The answer is "The correct step are 1, 2 and 4 ".

Step-by-step explanation:

In the question some data is missing so, its correct question can be defined as follows:

In the given equation:  

\to \bold{5k -3(2k- \frac{2}{3}) -9 =0}

Lorena's steps should be evaluated  

In Stage 1: It is right because it allocates – 3 to parentheses appropriately, , that's why she has 5k-6k+2-9=0  

In Stage 2:  It is right because in this term  5k and 2k are merged, that's why  she got -k-7=0  

In Stage 3:  It is not right because the propagation property of fair treatment was not used.  

In Stage 4: It is right because it multiplies the variable on one of the two sides by -1. So, k=-7 to get.

6 1
3 years ago
Read 2 more answers
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