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3 years ago

EMERGENCY PLZ HELP ASAP

Mathematics

2 answers:

USPshnik [31]3 years ago

5 0

Answer:

C) 50

Step-by-step explanation:

x+90+90+y+z=360

270+y+z=360

y+z=90

Therefore, C) 50

frozen [14]3 years ago

3 0

Answer:

50 degrees

Step-by-step explanation:

Ah ok so we know that x= 80 degrees.

y+z= x.

So all you have to do is input the values.

80-30=50

Hence the answer is C) 50

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If there's a sale and the original price is 140 and it's one fifth off how much is the sale?

Alex777 [14]

$112
1-1/5=4/5
4/5 x 140 =112
hope this helps :)

6 0

2 years ago

Modeling Radioactive Decay In Exercise, complete the table for each radioactive isotope.

Travka [436]

Answer :

The amount after 1000 years will be, 5.19 grams.

The amount after 10000 years will be, 0.105 grams.

Step-by-step explanation :

Half-life = 1599 years

First we have to calculate the rate constant, we use the formula :

$k=\frac{0.693}{t_{1/2}}$

$k=\frac{0.693}{1599\text{ years}}$

$k=4.33\times 10^{-4}\text{ years}^{-1}$

Now we have to calculate the amount after 1000 years.

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $4.33\times 10^{-4}\text{ years}^{-1}$

t = time passed by the sample = 1000 years

a = initial amount of the reactant = 8 g

a - x = amount left after decay process = ?

Now put all the given values in above equation, we get

$1000=\frac{2.303}{4.33\times 10^{-4}}\log\frac{8}{a-x}$

$a-x=5.19g$

Thus, the amount after 1000 years will be, 5.19 grams.

Now we have to calculate the amount after 10000 years.

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $4.33\times 10^{-4}\text{ years}^{-1}$

t = time passed by the sample = 10000 years

a = initial amount of the reactant = 8 g

a - x = amount left after decay process = ?

Now put all the given values in above equation, we get

$10000=\frac{2.303}{4.33\times 10^{-4}}\log\frac{8}{a-x}$

$a-x=0.105g$

Thus, the amount after 10000 years will be, 0.105 grams.

4 0

3 years ago

Solve for x. -3x 4 = -8

agasfer [191]

This question is false, there are no solutions, even if u take away the x and make it multiplication instead of a variable, still no solutions exist

5 0

2 years ago

De cite ori trebuie micsorat numarul 1000 pentru a obtine numarul cu 10 mai putin decit 50.

amid [387]

The answer is 19.8 to ur problem

5 0

2 years ago

If ΔRED ≅ ΔTAN, then which of the following statements is not true? RE ≅ TA ∠E ≅ ∠A RD≅ TA ∠D ≅ ∠N

Assoli18 [71]

Answer:

RD≅ TA

Step-by-step explanation:

RD≅ TA is not true statement as they are not corresponding sides.

4 0

3 years ago