3 years ago

Which is the value of this expression

Mathematics

1 answer:

galben [10]3 years ago

5 0

Answer:4/9

Step-by-step explanation:

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What is the value of x in this figure?

crimeas [40]

Answer:

26°

Step-by-step explanation:

x = 90° - 64° = 26°

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3 years ago

Geometric Series assistance

Levart [38]

we have been asked to find the sum of the series

$\sum _{n=1}^5\left(\frac{1}{3}\right)^{n-1}$

As we know that a geometric series has a constant ratio "r" and it is defined as

$r=\frac{a_{n+1}}{a_n}=\frac{\left(\frac{1}{3}\right)^{\left(n+1\right)-1}}{\left(\frac{1}{3}\right)^{n-1}}=\frac{1}{3}$

The first term of the series is $a_1=\left(\frac{1}{3}\right)^{1-1}=1$

Geometric series sum formula is

$S_n=a_1\frac{1-r^n}{1-r}$

Plugin the values we get

$S_5=1\cdot \frac{1-\left(\frac{1}{3}\right)^5}{1-\frac{1}{3}}$

On simplification we get

$S_5=\frac{121}{81}$

Hence the sum of the given series is $\frac{121}{81}$

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3 years ago

Jacon walks 70.4 feet in 0.2 hours. If he walks at the same rate the whole time, what is his spped in feet per hour?

timofeeve [1]

Answer:

12.7

Step-by-step explanation:

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3 years ago

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What the rate of change for f(t)=70(5/2)^t<br> help

denis23 [38]

5/2
70 is the constant number that doesn’t change, but anytime you increase t you are raising it above 5/2. So every time you grow 5/2.

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3 years ago

Solve 3(x+2)+5(x+2)=64

valkas [14]

Answer:

Step-by-step explanation:

3x+6+5x+10=64

3x+5x+6+10=64

8x+16=64

8x=64-16

8x=48

divide both sides by 8

x=6

6 0

3 years ago