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4 years ago

I need help please and thank you

Mathematics

1 answer:

algol134 years ago

4 0

Answer:

If one angle of a triangle is 110 deg and the other two angles are both 35 deg, then the figure is an obtuse isosceles triangle.

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Chef Alfredo has noticed some changes in his business. He usually sells 45 pizzas on Sunday afternoons. During football season,

melomori [17]

Answer:

mmmmm i think its 75

Step-by-step explanation:

7 0

4 years ago

the variable Z1 and Z2 are defined as z1 equals 6i+3i and z2 equals 10 + 8i which expression is equivalent to Z1Z2

Alexxx [7]

If you multiply the two numbers, you will have 36 + 78i.
*I assumed you had a typo in the first expression, it is generally written as 6 + 3i. If you meant, 6i + 3i, it should have been just 9i.

To find this product, we use the foil method.

(6 + 3i)(10 + 8i)
60 + 48i + 30i + 24i^2
60 + 78i + 24(-1)
34 + 78i

8 0

3 years ago

After Megan walked 5 miles her activity tracker had counted 9780 steps David activity calendar had counted 11,928 steps after he

Alex

Answer:

David 1,988-1,956+32

It is David because when you find the unite ratio you get 1,988 for David and 1,956 for Megan.

4 0

3 years ago

Stress at work: In a poll conducted by the General Social Survey, 80% of respondents said that their jobs were sometimes or alwa

Svet_ta [14]

Answer:

a) P=0.019

b) P=0.263

c) P=0.794

Step-by-step explanation:

We assume that the poll gives the population's proportion of respondents said that their jobs were sometimes or always stressful (p=0.8).

Then, a sample of size n=190 is taken.

The sample mean is:

$\mu=np=190*0.8=152$

The sample standard deviation is:

$\sigma=\sqrt{np(1-p)}=\sqrt{190*0.8*0.2}=\sqrt{30.4}=5.514$

The probability that 140 or fewer workers find their jobs stressful is:

$z=(X-\mu)/\sigma=(140.5-152)/5.514=-11.5/5.514=-2.08 \\\\P(X\leq140)=P(X$

Note: a correction for continuity is applied.

The probability that more than 155 workers find their jobs stressful is

$z=(X-\mu)/\sigma=(155.5-152)/5.514=3.5/5.514= 0.635 \\\\P(X>155)=P(X>155.5)=P(z>0.635)=0.263$

The probability that the number of workers who find their jobs stressful is between 145 and 158 inclusive is:

$z_1=(X_1-\mu)/\sigma=(158.5-152)/5.514=6.5/5.514= 1.179\\\\ z_2=(X_2-\mu)/\sigma=(144.5-152)/5.514=-7.5/5.514= -1.360 \\\\ P(145\leq X\leq 158)=P(144.5< X< 158.5)\\\\P(145\leq X\leq 158)=P(X$

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3 years ago

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Problem Page Jessica's boat has a top speed of 6 miles per hour in still water. While traveling on a river at top speed, she wen

stealth61 [152]

I think it is 3:1 so tell me if it is wrong

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3 years ago