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3 years ago

Find the perimeter of the figure. ( Its a square, and one side says 20 ft while another says 18ft. I am confused. )

Mathematics

1 answer:

Luba_88 [7]3 years ago

3 0

It might look like a square but it might actually be a rectangle but the answer is 76ft

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A submarine sits at –300 meters in relation to sea level. Then it descends 115 meters. What is its new position in relation to s

avanturin [10]

Answer:

$New\ Position = -415m$

Step-by-step explanation:

Given

$Position= -300m$

$Descend = 115m$

Required

Determine the new position

It descends means that it moved in the downward position.

So, the new position is:

$New\ Position = Position - Descend$

$New\ Position = -300m - 115m$

$New\ Position = -415m$

Hence, the new position f the submarin is -415m

3 0

3 years ago

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A triangular flag has an area of 187.5 square inches. The base of the flag measures 25 inch How tall is the triangular flag?

SpyIntel [72]

To find the height, you would do the area divided by the base, or in this case,187.5 / 25 which equals 7.5 inches. Hope this helped!

6 0

3 years ago

4) y=-4x-1 Finding slope

Lisa [10]

Answer:

4/1

Step-by-step explanation:

this is because it is 4x

6 0

3 years ago

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The Department of Transportation would like to test the hypothesis that the average age of cars on the road is less than 12 year

puteri [66]

Answer:

$z=\frac{10.6-12}{\frac{4.1}{\sqrt{45}}}=-2.29$

Step-by-step explanation:

information given

$\bar X=10.6$ represent the sample mean

$\sigma=4.1$ represent the population standard deviation

$n=45$ sample size

$\mu_o =12$ represent the value that we want to test

$\alpha=0.05$ represent the significance level for the hypothesis test.

z would represent the statistic

$p_v$ represent the p value for the test

Hypothesis to test

We want to test if the true mean is less than 12, the system of hypothesis would be:

Null hypothesis: $\mu \geq 10$

Alternative hypothesis: $\mu < 10$

The statistic is given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

Replacing the info given we got:

We can replace in formula (1) the info given like this:

$z=\frac{10.6-12}{\frac{4.1}{\sqrt{45}}}=-2.29$

8 0

3 years ago

Please help i don’t understand

olganol [36]

9514 1404 393

Answer:

Step-by-step explanation:

Vertical angles share a vertex point, and have opposite rays for sides. In short, they are across the point of intersection from each other. Vertical angles do not have a common side (they are not adjacent).

The first part of the problem is to identify angle NCA. That is shown in red in the attachment. The vertical angle is across the point of intersection. It is angle 3.

5 0

3 years ago