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nikitadnepr [17]
3 years ago
7

Evaluate ƒ(x) = –4x – 5 for x = –1.

Mathematics
1 answer:
11111nata11111 [884]3 years ago
4 0
The answer would -1
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2. Suppose (220)_b and (251)_b are the squares of consecutive integers. Determine b.
Andrei [34K]

Let x and x+1 be these consecutive integers. For some base b, we can write

(x_{10})^2=220_b=2b^2+2b

((x+1)_{10})^2=251_b=2b^2+5b+1

If

x^2=2b^2+2b

then

x^2+1=2b^2+2b+1

Now,

x^2+2x+1=2b^2+5b+1

2x+2b^2+2b+1=2b^2+5b+1

\implies2x=3b

Squaring both sides gives

4x^2=9b^2

and so

4(2b^2+2b)=9b^2

\implies8b^2+8b=9b^2

\implies b^2-8b=0\implies\boxed{b=8}

(because the base has to be non-zero)

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3 years ago
Manipulate the triangle so angle A measures 41° and
Sergio039 [100]

Answer: angle B will be 90°

Sum of the angles = 180°

4 0
3 years ago
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Hiiio!❤️ Could someone please help me with this question!❤️❤️❤️
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Answer:

What question

Step-by-step explanation:

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2 years ago
If a rope 36 feet long is cut into two pieces in such a way that one piece is twice as long as the other piece, how long must th
SVEN [57.7K]
24 feet long :)
All I did was I divided the 36 into 3 equal parts of 12, then doubled the 12 to make that longer piece 24 feet. This 24 foot piece would be twice as long as the other leftover 12 foot piece since 12x2=24
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Mr.Scott weekly salary is $37 less than Mr. Khanna's. If Scott weekly salary is $584, what is Khanna's weekly salary?​
ycow [4]

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Khannas salary is $547

Step-by-step explanation

Literally all you have to do is subtract 584 by 37.

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