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Murrr4er [49]
4 years ago
7

How do you solve for b in this expression

Mathematics
1 answer:
Leona [35]4 years ago
7 0
Remember you can do anything to an equation as long as you do it to both sides


8-(3+b)=b-9

remember the distributive property
a(b+c)=ab+ac

distribute that invisible -1
-(3+b)=-1(3+b)=-1(3)-1(b)=-3-b

8-3-b=b-9
add like terms
5-b=b-9
add b to both sides
5=2b-9
add 9 to both sides
14=2b
divide both sides by 2
7=b
b=7
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An = 5 - 7n. What is the value of a12?
Delicious77 [7]

Answer:

The value of a_{12}=-79

Step-by-step explanation:

Being the general expression of the sequence:

a_n=5-7n

We replace the value n=12 to get

a_{12}=5-7\times 12=5-84=-79

7 0
3 years ago
Ron walked 8/10 mile from his grandmothers house to the store. Then he walked 9/10 mile to his house. Use benchmarks to estimate
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Step-by-step explanation:

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What I the value of 1/4x² + 4 when x=4
Daniel [21]

Answer:

5

Step-by-step explanation:

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3 years ago
Prove the identity. sin(−θ) cot(−θ) = cos θ
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4 0
3 years ago
You deposit $2200 in the account that pays 3% annual interest compounded continuously after 20 years you withdraw the money what
Butoxors [25]

Answer: 6600

Step-by-step explanation:

To find the original price, first we need to answer, \$\greenD{1.54}$1.54dollar sign, start color #1fab54, 1, point, 54, end color #1fab54 is \blueD{5.5}\%5.5%start color #11accd, 5, point, 5, end color #11accd, percent of what number?

Hint #22 / 5

Percent means per hundred, so \blueD{5.5}\%5.5%start color #11accd, 5, point, 5, end color #11accd, percent is equivalent to \blueD{\dfrac{5.5}{100}}

100

5.5

​

start color #11accd, start fraction, 5, point, 5, divided by, 100, end fraction, end color #11accd which is also equal to \blueD{5.5\div 100}5.5÷100start color #11accd, 5, point, 5, divided by, 100, end color #11accd.

\blueD{5.5 \div 100 = 0.055}5.5÷100=0.055start color #11accd, 5, point, 5, divided by, 100, equals, 0, point, 055, end color #11accd

Hint #33 / 5

To find the original price, we need to know \blueD{0.055}0.055start color #11accd, 0, point, 055, end color #11accd times what number equals \greenD{1.54}1.54start color #1fab54, 1, point, 54, end color #1fab54.

\blueD{0.055} \maroonD{x} = \greenD{\$1.54}0.055x=$1.54start color #11accd, 0, point, 055, end color #11accd, start color #ca337c, x, end color #ca337c, equals, start color #1fab54, dollar sign, 1, point, 54, end color #1fab54

Hint #44 / 5

\begin{aligned} \blueD{0.055} \maroonD{x} &= \greenD{\$1.54} \\\\ \dfrac{\blueD{0.055} \maroonD{x}}{\blueD{0.055}} &= \dfrac{\greenD{\$1.54}}{\blueD{0.055}} \\\\ \maroonD{x} &= \maroonD{28} \end{aligned}

0.055x

0.055

0.055x

​

x

​

 

=$1.54

=

0.055

$1.54

​

=6600

7 0
3 years ago
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