3 years ago

14. What is the rate if the distance traveled is 360 miles for 6 hours?

Mathematics

1 answer:

Mekhanik [1.2K]3 years ago

8 0

Answer:

Step-by-step explanation:

360/6=60

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Rewrite each expression as a sum -8x^2 + 3xy - 9x - 3

Gnesinka [82]

$-8x^2 + 3xy - 9x - 3
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$There \ are \ no \ like \ terms.$

$No \ Solution$

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3 years ago

Right triangles abc and dbc with right angle c are given below. If cos(a)=15,ab=12 and cd=2, find the length of bd.

dmitriy555 [2]

see the attached figure to better understand the problem

we have that

$cos(A)=\frac{1}{5} \\ AB=12\ units\\ CD=2\ units$

Step 1

Find the value of AC

we know that

in the right triangle ABC

$cos (A)=(AC/AB)\\AC=AB*cos(A)$

substitute the values in the formula

$AC=12*(1/5)\\ AC=2.4\ units$

Step 2

Find the value of BC

we know that

in the right triangle ABC

Applying the Pythagorean Theorem

$AB^{2} =AC^{2}+BC^{2}\\ BC^{2}=AB^{2} -AC^{2}$

substitute the values

$BC^{2}=12^{2} -2.4^{2}\\BC^{2}= 138.24\\ BC=11.76\ units$

Step 3

Find the value of BD

we know that

in the right triangle BCD

Applying the Pythagorean Theorem

$BD^{2} =DC^{2}+BC^{2}$

substitute the values

$BD^{2} =2^{2}+11.76^{2}$

$BD=11.93\ units$

therefore

the answer is

the length of BD is 11.93 units

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3 years ago

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Y=x^2-3x-6 x+y=2 Help 50 Points!!! Show Work

Alborosie

X + y = 2 —> y = 2 - x
insert to first equation
2-x=x^2-3x-6
x^2 - 3x - 6 - 2 + x = 0
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The graph shows a proportional relationship.What is the unit rate? Enter your answer as an improper fraction in simplest form in

ruslelena [56]

That is the slope
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we see we have (2/5,1/2)
rise is y, run is x
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unit rate is y=(1/5)x

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Suppose the population of a certain city is 4251 thousand. It is expected to decrease to 3360 thousand in 50 years. Find the per

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Answer:

22.77%

Step-by-step explanation:

4351-3360 / 4351 x 100 = 22.77%

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