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3 years ago

What is 145.4 - 140.02 ?

Mathematics

2 answers:

Assoli18 [71]3 years ago

3 0

Answer:

5.38

Step-by-step explanation:

145.4 - 140.02 = 5.38

koban [17]3 years ago

3 0

5.38 that is the answer, 145.5 - 140.02 = 5.38

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Find measure of angle BDC

Liula [17]

The 2 angles are complemantary or form right angles so $-3x+20-2x+55=90=-5x+75=90=-5x=15
$ so $x=3$ . Plugging that into BDC we get 11

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3 years ago

Type 11/5 in the simplest form

aleksklad [387]

Answer:

$2\frac{1}{5}$

Step-by-step explanation:

11 ÷ 5 = 2 R 1 → $2\frac{1}{5}$

Hope this helps! :)

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3 years ago

MathsWatch Question <br> Please Help

elena-s [515]

Answer:

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Step-by-step explanation:

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2 years ago

The value of a certain car decreases by 16% each year. What is the 1⁄2-life of the car?

svet-max [94.6K]

Answer:

The half life of the car is 3.98 years.

Step-by-step explanation:

The value of the car after t years is given by the following equation:

$V(t) = V(0)(1-r)^{t}$

In which V(0) is the initial value and r is the constant decay rate, as a decimal.

The value of a certain car decreases by 16% each year.

This means that $r = 0.16$

$V(t) = V(0)(1-r)^{t}$

$V(t) = V(0)(1-0.16)^{t}$

$V(t) = V(0)(0.84)^{t}$

What is the 1⁄2-life of the car?

This is t for which V(t) = 0.5V(0). So

$V(t) = V(0)(0.84)^{t}$

$0.5V(0) = V(0)(0.84)^{t}$

$(0.84)^{t} = 0.5$

$\log{(0.84)^{t}} = \log{0.5}$

$t\log{0.84} = \log{0.5}$

$t = \frac{\log{0.5}}{\log{0.84}}$

$t = 3.98$

The half life of the car is 3.98 years.

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3 years ago

Which expression is equivalent to - (4-3)

LenaWriter [7]

This is equivalent to -1 ( 4 - 3 )
which simplified is -1
because 4-3 is 1 and 1 times -1 is -1

Hope this helps ;)

5 0

3 years ago

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