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3 years ago

4=(1/2)^× solve for x

Mathematics

1 answer:

cricket20 [7]3 years ago

4 0

$4=\left(\frac{1}{2}\right)^x\\
2^2=2^{-x}\\
x=-2
$

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John took all his money from his savings account. He spent $110 on a radio and 4/11 of what was left on presents for his friend

svp [43]

Answer:

$1210

Step-by-step explanation:

Let x be total amount

First John spent $110 on a radio and 4/11 of what was left on presents for his friends so he was left with

$\frac{7}{11}(x-110)=\frac{7}{11}x-70$

Then he put 2/5 of his remaining money into a checking account

$\frac{3}{5}\left(\frac{7}{11}x-70\right)$

Rest he donated to charity

$420=\frac{3}{5}\left(\frac{7}{11}x-70\right)\\\Rightarrow \left(\frac{7}{11}x-70\right)=\frac{2100}{3}\\\Rightarrow \frac{7}{11}x-70=700\\\Rightarrow \frac{7}{11}x=770\\\Rightarrow x=1210$

Hence total amount of money John originally had was $1210

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2 years ago

6.1/5(12b+5) for b = 5/6

Temka [501]

Answer:

Step-by-step explanation:

6.1 / 5 ( 12b + 5 )

b = 5/6

by substituting,

6.1 / 5 ( 12 × 5/6 + 5 )

1.22 × 15

= 18.3

Hope this helps

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7 0

3 years ago

Lynette wanted to run one mile in eight minutes. To be on pace to reach

natta225 [31]

Answer:

0.25 miles

Step-by-step explanation:

assuming that she keeps a constant Velocity/ speed,

find the speed she intends to run with, ie total distance/time

$\frac{1}{8} miles \: per \: minute$

find the distance she travels in two minutes, ie speed multiplied by time.

$\frac{1}{8} \times 2 = \frac{1}{4 } = 0.25$

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3 years ago

Daniel’s school is selling tickets to the annual talent show. On the first day of ticket sales, the school sold 8 senior citizen

zavuch27 [327]

Answer:

the answer is 17

Step-by-step explanation:

You divide 8 and 136 and get 17, you multiply 17 and 8 to double check your answer, Hope this helps :P!

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3 years ago

Read 2 more answers

F(x)=7-3x slope and intercept

solong [7]

Answer:

3 is the slope and 7 is the y intercept

Step-by-step explanation:

3 represents the slope and 7 represents the y intercept

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3 years ago