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3 years ago

(11 – 9)' – 2 x 4= Please help

Mathematics

2 answers:

PIT_PIT [208]3 years ago

7 0

Answer: 2 − 8x

Step-by-step explanation:

shusha [124]3 years ago

4 0

The answer is -6 (negative Six)

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D.only 1 <br> Geometry math question no Guessing

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The answer would be B. Only 3.

An object has a line of symmetry when it is cut a certain way and both parts are identical. Only line 3 will give you two identical halves when cut in that way.

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4 years ago

Chef Rita is cooking for a Sunday brunch.She knows that 22 pancakes can feed 8 people. She is wondering how many people(p) she c

sergij07 [2.7K]

Answer:24

Step-by-step explanation:

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3 years ago

Solve for x: 4(x-5) 8. = 9y

lora16 [44]

Answer:

X=18y+5

EXPLANATION

4(X-5)/8 =9Y

(4X-20)/8 =9Y

4X-20=9Y×8

4X=72Y+20

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2 years ago

The radioactive isotope of lead, Pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.

blagie [28]

Answer:

$N(t) =N_o (\frac{1}{2})^{\frac{t}{t_{1/2}}}$

Where $t_{1/2}= 3.3 hr$ represent the half life and the intial amount would be $N_o = 1$

And we want to find the time in order to have a 95% of decay so we can set up the following equation:

$0.05 = 1 (0.5)^{t/3.3}$

If we apply natural log on both sides we got:

$ln(0.05) = \frac{t}{3.3} ln (0.5)$

And solving for t we got:

$t= 3.3 *\frac{ln(0.05)}{ln(0.5)}= 14.26$

So then would takes about 14.26 hours in order to have 95% of the lead to decay

Step-by-step explanation:

For this case we can define the variable of interest amount of Pb209 and for the half life would be given:

$N(t) =N_o (\frac{1}{2})^{\frac{t}{t_{1/2}}}$

Where $t_{1/2}= 3.3 hr$ represent the half life and the intial amount would be $N_o = 1$

And we want to find the time in order to have a 95% of decay so we can set up the following equation:

$0.05 = 1 (0.5)^{t/3.3}$

If we apply natural log on both sides we got:

$ln(0.05) = \frac{t}{3.3} ln (0.5)$

And solving for t we got:

$t= 3.3 *\frac{ln(0.05)}{ln(0.5)}= 14.26$

So then would takes about 14.26 hours in order to have 95% of the lead to decay

4 0

4 years ago

If angle y measures 65 degrees how much does x measure?

belka [17]

Answer:

supplementary angles add up to 180°

given y=65° thus...

x+y=180°

x + 65°=180°

x=180°- 65°

x=115°

8 0

3 years ago

Read 2 more answers