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2 years ago

√2+1 b) Rationalize the denominator: √2+1

Mathematics

1 answer:

Misha Larkins [42]2 years ago

4 0

Answer:

there is not a complete question here ...

$\sqrt{2} +1$ is not in a denominator to rationalize

if it were you would multiply the rational expression (the fraction)

by $\frac{\sqrt{2} -1}{\sqrt{2} -1}$ the result (in the denominator would end up being "2 -1"

which is 1

Step-by-step explanation:

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The value of a car declined 20% per year. what percent of the original value remains after 2 years

GalinKa [24]

60% is answer...20% is taken each year so After 2 yrs it's 40% less 100-40 is 60

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3 years ago

Y is directly proportional to x,and y=216 when x=2. Find y when x=7.

makkiz [27]

$\bf \qquad \qquad \textit{direct proportional variation}\\\\
\textit{\underline{y} varies directly with \underline{x}}\qquad \qquad y=kx\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad variation
\end{array}\\\\
-------------------------------\\\\
\textit{we also know that }
\begin{cases}
y=216\\
x=2
\end{cases}\implies 216=k2\implies \cfrac{216}{2}=k
\\\\\\
108=k\qquad therefore\qquad \boxed{y=108x}
\\\\\\
\textit{when x = 7, what is \underline{y}?}\qquad y=108(7)$

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3 years ago

In one week the owner of Carly's Coffeehouse found that the number of orders for bagels was 2/3 the number of orders for chocola

Novosadov [1.4K]

Answer:

210

Step-by-step explanation:

We can write the ratio as ...

bagels : scones = 2 : 3

Then bagels are 2/(2+3) = 2/5 of the total.

# bagels = (2/5)(525)

# bagels = 210

3 0

3 years ago

If f(x) = 2x + 3, what is f(–1)?

Helen [10]

Answer:

Normally, sequences don't go behind 1, but let's see for this one.

f(-1) = 1

Step-by-step explanation:

Let's sub for -1 in x.

f(-1) = 2(-1) + 3.

f(-1) = -2 + 3

f(-1) = 1

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2 years ago

Read 2 more answers

2. You deposit $1200 into a bank account. Every year that accounts increase by 15 %.

lord [1]

Answer:

Exponential Growth, 1200(1.15)

Step-by-step explanation:

It is a Growth function because it is "increasing" yearly. The equation is multiplying with 1.15 because when it is increasing, you need to add 1 to the percentage rate.

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2 years ago