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2 years ago

I really need help with these questions !!!! Plzzz! 2-4

Mathematics

2 answers:

tresset_1 [31]2 years ago

6 0

The picture I sent is how to do #2

Igoryamba2 years ago

4 0

4) Triangle DMC is Isosceles because only two of its sides are equal and the other is not which is the bottom one therefore it makes it isosceles and not equilateral because not all of it’s sides are equal

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Find positive integers that satisfy

tankabanditka [31]

9514 1404 393

Answer:

(x, y, z) = (1, 2, 3)

Step-by-step explanation:

The equations that result from reduction to row-echelon form are ...

x = 0.4 +0.2t

y = 5.6 -1.2t

z = t

Then t must have a value 5n+3 for 0 ≤ n < 1. That is, t=3.

x = 0.4 +0.2(3) = 1

y = 5.6 -1.2(3) = 2

z = 3

The integers that satisfy are (x, y, z) = (1, 2, 3).

4 0

2 years ago

Read 2 more answers

Assume the time required to complete a product is normally distributed with a mean 3.2 hours and standard deviation .4 hours. Ho

Alex787 [66]

Answer: 3.712 hours or more

Step-by-step explanation:

Let X be the random variable that denotes the time required to complete a product.

X is normally distributed.

$X\sim N(\mu=3.2\text{ hours},\ \sigma=0.4\text{ hours} )$

Let x be the times it takes to complete a random unit in order to be in the top 10% (right tail) of the time distribution.

Then, $P(\dfrac{X-\mu}{\sigma}>\dfrac{x-\mu}{\sigma})=0.10$

$P(z>\dfrac{x-3.2}{\sigma})=0.10\ \ \ [z=\dfrac{x-\mu}{\sigma}]$

As, $P(z>1.28)=0.10$ [By z-table]

Then,

$\dfrac{x-3.2}{0.4}=1.28\\\\\Rightarrow\ x=0.4\times1.28+3.2\\\\\Rightarrow\ x=3.712$

So, it will take 3.712 hours or more to complete a random unit in order to be in the top 10% (right tail) of the time distribution.

3 0

2 years ago

Write the resulting inequality. −7 ≤ −2; Add 8 to both sides

Cloud [144]

Answer:

1 is less than or equal to 6

Step-by-step explanation:

1 is less than or equal to 6

7 0

3 years ago

3) Keith took a ferry to a nearby island that lasted for 82 minutes. Although he forgot to check the

adell [148]

Answer:

Step-by-step explanation:

so if he arrived at 11:22 AM.....and it took him 82 minutes....

82 minutes = 1 hr and 22 minutes

then he departed at :

11:22 - 1 hr and 22 minutes = 10:00 AM <==

6 0

2 years ago

PLEASE HELP 50 POINTS

Arte-miy333 [17]

Answer:

30°

Step-by-step explanation:

A and B are same side interior angles and hence supplementary:

m∠A + m∠B = 180°

Substitute values and solve for x:

6x - 18 + 14x + 38 = 180
20x + 20 = 180
20x = 160
x = 160/20
x = 8

Find the measure of ∠A:

m∠A = 6*8° - 18° = 30°

3 0

2 years ago