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3 years ago

Really need help please help me

Mathematics

1 answer:

8_murik_8 [283]3 years ago

3 0

Answer:

Step-by-step explanation:

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What is the simplified expression for the expression below?

olchik [2.2K]

Answer:

I do believe the awnser would be b. (or the second option) in not completly sure but its the awnser I came up with:)

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3 years ago

Evaluate rg + 2d when r = 3, g = 5, and d = 2

qwelly [4]

Answer:

rg+2d= 12

Step-by-step explanation:

(3+5)+2(2)

8+4=12

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3 years ago

A toy car can go 4 mph. How long would it take to go 9 miles?

goldenfox [79]

Answer:

2 hours and 25 mins

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3 years ago

Read 2 more answers

MATH HELP PLEASE 5 AND 6

makvit [3.9K]

Answer:

8, 6, 4, 2= 67°

5,7,1,3= 113°

6) not sure about this one!

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3 years ago

In a solar system, two comets pass near the sun, which is located at the origin. Comet E is modeled by quantity y plus 16 end qu

Leya [2.2K]

Explanation:

The equation of comet E is given below as

$\frac{(y+16)^2}{400}+\frac{x^2}{144}=1$

The equation of comet H is modelled below as

$\frac{(y+13)^2}{144}-\frac{x^2}{25}=1$

Given, that the Sun is located at the origin.

This is an equation of an ellipse. So, the path traveled by Comet e is an elliptic path.

Comparing with the Standard equation of ellipse: below,we will have

$\frac{(y-k)^2}{b^2}+\frac{(x-h)^2}{a^2}$

Whise center is

$\begin{gathered} center=(h,k) \\ vertices=(h\pm a,0) \end{gathered}$

By comparing coefficient, we will have

$\begin{gathered} a^2=144 \\ a=12 \\ b^2=400 \\ b=20 \\ k=-16 \\ h=0 \\ (h,k)=(0,-16) \end{gathered}$

Hence,

The vertex of comet E will be

$\begin{gathered} (h\pm a,0) \\ (0+12,0),(0-12,0) \\ (12,0),(-12,0) \end{gathered}$

The vertex of comet E is

$(12,0),(-12,0)$

Part C:

It is the foci forboth comets

$\begin{gathered} cometE: \\ c=\sqrt{b^2-a^2} \\ c=\sqrt{400-144} \\ c=\sqrt{256} \\ c=16 \\ \\ For\text{ comet F:} \\ c=\sqrt{a^2-b^2} \\ c=\sqrt{144+25} \\ c=\sqrt{169} \\ c=13 \end{gathered}$

Hence,

The foci will be

$\begin{gathered} (16\pm16,0) \\ cometE \\ (0,0),(32,0) \\ cometF: \\ (13\pm13,0) \\ (0,0),(26,0) \end{gathered}$

5 0

1 year ago