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4 years ago

If b= 7, what is 1/3(2b+10)? Please help

Mathematics

2 answers:

nignag [31]4 years ago

8 0

<h3>Answer: 8</h3>

=========================================

b = 7 means we can replace b with 7

2*b = 2*7 = 14

2*b+10 = 14+10 = 24

Take 1/3 of this to get 8 as the final answer

goblinko [34]4 years ago

3 0

Answer:8

Step-by-step explanation:

First, substitute 7 into the equation for b:

1/3(2x7+10)

Now, simplify using the order of operations:

1/3(14+10)

Then:

1/3 (24)

And you arrive at your answer:

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Answer:

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4 years ago

Find the Perimeter of the Square with One side is 75cm

Korvikt [17]

Answer:

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Step-by-step explanation:

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2 years ago

Read 2 more answers

Calculate s5 for the sequence defined by

pantera1 [17]

ANSWER

$S_5= 42.5$

EXPLANATION

The general term of the arithmetic sequence is

$a_n=1+\frac{5}{2}n$

For the first term,we substitute $n=1$ to get,

$a_1=1+\frac{5}{2}\times 1$

$a_1=1+2.5=3.5$

Similarly

$a_5=1+\frac{5}{2}\times 5$

$a_5=13.5$

The sum of the first n-terms is given by the formula,

$S_n=\frac{n}{2}(a_1+l)$

where l is the last term.
In this case

$l=a_5=13.5$

We substitute these values to get,

$S_5= \frac{5}{2} (3.5 + 13.5)$

$S_5= \frac{5}{2} (17)$
$S_5=42.5$

We could have also used the formula,

$S_n=\frac{n}{2}(2a_1+(n-1)d)$

$S_5=\frac{5}{2}(2(3.5)+(5-1)2.5)$

$S_5=42.5$

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4 years ago

Read 2 more answers

Simplify the expression: -2x + 3 - (5-6x)

levacccp [35]

Answer:

4x+3

How: -2x - (-6x) = 4

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8 0

3 years ago

Roberto is x years older than his only sister but 10 years ago he was twice her age. What are the current ages of the siblings?

adell [148]

Answer:

S = x + 10

R = 2x + 10

Step-by-step explanation:

If R is Roberto's age, and S is his sister's age, then:

R = S + x

R − 10 = 2 (S − 10)

Solve with substitution.

S + x − 10 = 2 (S − 10)

S + x − 10 = 2S − 20

S = x + 10

R = 2x + 10

6 0

3 years ago