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4 years ago

-

\sqrt{5 } - 3 \sqrt{5} " alt=" - \sqrt{5 } - 3 \sqrt{5} " align="absmiddle" class="latex-formula">

Mathematics

1 answer:

xxTIMURxx [149]4 years ago

3 0

Step-by-step explanation:

$-\sqrt5-3\sqrt5=-1\sqrt5-3\sqrt5=(-1-3)\sqrt5=-4\sqrt5$

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Mandy divided the sum of 12 and

Aleksandr [31]

Answer:

Step-by-step explanation:

I hope this helps you.

12+24=38

38÷6=31

31+4=35

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3 years ago

Giving brainlist to whoever answers

just olya [345]

Answer:

False

Step-by-step explanation:

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3 years ago

(2x² - 5) - (3x² + 4).

Goshia [24]

(2x² - 5) - (3x² + 4).

Pretend that there is a -1 in front of :(3x² + 4).

(2x^2-5)-1(3x^2+4)

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4 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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4 years ago

If y = -5 when x = 2, find y when x = 8.

nasty-shy [4]

Answer:

Y= -20

Step-by-step explanation:

if y=-5 when x=2 find y when x=8

8 /2 = 4

=> x = 2 * 4 => x = 8 Answer

y = -5 * 4 =>

y= -20

4 0

2 years ago