3 years ago

What is the first step in evaluating (12.9 – 3.1) × 6.2 – 2 + 43

Mathematics

2 answers:

jeka943 years ago

7 0

Answer:

(12.9 - 3.1) i'm in middle school so if i can do it you can

Step-by-step explanation:

UNO [17]3 years ago

4 0

Answer:

101.76

Step-by-step explanation:

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1. A poll asked 15 teenagers their gender and whether or not they play basketball. The results are recorded in the table.

masya89 [10]

8 were boys and 2 didn't play basketball

6 0

4 years ago

A gondola (cable car) at a ski area holds 50 people. Its maximum safe load is 10000 pounds. A population of skiers has a distrib

fenix001 [56]

Answer: 0.03855

Step-by-step explanation:

Given :A population of skiers has a distribution of weights with mean 190 pounds and standard deviation 40 pounds.

Its maximum safe load is 10000 pounds.

Let X denotes the weight of 50 people.

As per given ,

Population mean weight of 50 people = $\mu=50\times190=9500\text{ pounds}$

Standard deviation of 50 people $=\sigma=40\sqrt{50}=40(7.07106781187)=282.84$

Then , the probability its maximum safe load will be exceeded =

$P(X>10000)=P(\dfrac{X-\mu}{\sigma}>\dfrac{10000-9500}{282.84})\\\\=P(z>1.7671-8)\\\\=1-P(z\leq1.7678)\ \ \ \ [\because\ P(Z>z)=P(Z\leq z)]\\\\=1-0.96145\ \ \ [\text{ By p-value of table}]\\\\=0.03855$

Thus , the probability its maximum safe load will be exceeded = 0.03855

3 0

4 years ago

5 Divided by (1200+700)

solmaris [256]

Answer:

380

Step-by-step explanation:

1200 + 700 = 1900/5 = 380

7 0

3 years ago

8000000000000000 minus 280000000000000 In standard form

zavuch27 [327]

Answer:

7.72 * 10^15

Step-by-step explanation:

8*10^15 - 2.8*10^14 = 7.72 * 10^15

5 0

3 years ago

Simplify the answer pls

disa [49]

Answer:

Step-by-step explanation:

24/3 - 4

8 - 4 = 4

4 0

4 years ago