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rodikova [14]
4 years ago
6

−20≤59(F−32)≤−15 please i need help v+8 <3v+8 <3 or −8v<−40−8v<−40 6

Mathematics
1 answer:
ozzi4 years ago
6 0
The answer is -148≤ F≤ -103!
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Express the mixed number 6 3/8 as a improper fraction? please show work.
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6 3/8

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48+3= 51

51/8

Answer: 51/8

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Find sec 2Theta in exact value
forsale [732]

Answer:

sec(2\theta)=-\frac{5}{4}

Step-by-step explanation:

we know that

step 1

Find cos(\theta)

we know that

tan^2(\theta)+1=sec^2(\theta)

we have

tan(\theta)=3

substitute

3^2+1=sec^2(\theta)

sec^2(\theta)=10

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Remember that

Angle theta lie in Quadrant I

so

sec(\theta) is positive

sec(\theta)=\sqrt{10}

Remember that

sec(\theta)=\frac{1}{cos(\theta)}

therefore

cos(\theta)=\frac{1}{\sqrt{10}}

step 2

Find sin(\theta)

we know that

tan(\theta)=\frac{sin(\theta)}{cos(\theta)}

sin(\theta)=tan(\theta)cos(\theta)

we have

cos(\theta)=\frac{1}{\sqrt{10}}

tan(\theta)=3

substitute

sin(\theta)=(3)(\frac{1}{\sqrt{10}})

sin(\theta)=\frac{3}{\sqrt{10}}

step 3

Find cos(2\theta)

we know that

cos(2\theta)=2cos^2(\theta)-1

we have

cos(\theta)=\frac{1}{\sqrt{10}}

substitute

cos(2\theta)=2(\frac{1}{\sqrt{10}})^2-1

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Remember that

sec(2\theta)=\frac{1}{cos(2\theta)}

therefore

sec(2\theta)=-\frac{5}{4}

8 0
3 years ago
Max ran 5 miles on Thursday. One mile is equal to 5,280 feet. Which proportion can be used to determine how many feet, x, Max ra
Scorpion4ik [409]

Answer:

1 mi/5280 ft = 5 mi/x ft

Step-by-step explanation:

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This is the first fraction:

1 mi/5280 ft

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If the problem asked specifically for the value of variable x, you would multiply 5 miles by 5280 feet to find it.

The problem only asks for the set up of the proportion though so:

1 mi/5280 ft = 5 mi/x ft

5 0
3 years ago
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