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Naddik [55]
3 years ago
15

Someone please help me? Answe is NOT 4/7 , tried that already

Mathematics
1 answer:
pishuonlain [190]3 years ago
5 0
Yes the answer is not 4/7 its 7/4
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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

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(because the base has to be non-zero)

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3 years ago
A 7-foot ladder is leaned against a building in such a way that the bottom of the ladder is 4 feet from the base of the wall. Fi
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Ii think it’s t’s 55 degree, use cos
7 0
3 years ago
A giraffe can run 40 meters per second what is its speed in miles per hour
lora16 [44]
Bearing in mind that, there are

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1000 meters in 1 km,
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\\\\\\
\cfrac{144000mi}{1609hr}\approx 89.496581\frac{mi}{hr}
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John buys a new motorcycle for $1,420.00 and a helmet for $75.00. If there is an 8% sales tax, how much will John pay when purch
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He will pay 2,340 dollars
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4 years ago
Use a calculator to find the r-value of these data. Round the value to three decimal places.
Sindrei [870]

Answer:

-0.985

Step-by-step explanation:

Refer to the image below for explanation:

4 0
2 years ago
Read 2 more answers
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