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3 years ago

WILL GIVE BRAINLYEST

Mathematics

2 answers:

zalisa [80]3 years ago

5 0

Answer:

Step-by-step explanation:

Let us factor out the 5:

5*x + 5*2y- 5*3

5(x+2y-3)

Therefore, C

I hope this helps! :)

Ronch [10]3 years ago

5 0

Answer:

I think it C

Step-by-step explanation: may i get brainliest please

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Half-life of Po-210 is 140 days. If the initial mass of the sample is 5

Anna35 [415]

Answer:

$0.625kg$

Step-by-step explanation:

we are given half-life of PO-210 and the initial mass

we want to figure out the remaining mass after 420 days

in order to solve so we can consider the half-life formula given by

$\displaystyle f(t) = a {0.5}^{t/T}$

where:

f(t) is the remaining quantity of a substance after time t has elapsed.
a is the initial quantity of this substance.
T is the half-life

since it halves every 140 days our T is 140 and t is 420. as the initial mass of the sample is 5 our a is 5

thus substitute:

$\displaystyle f(420)=5\cdot{0.5}^{420/140}$

reduce fraction:

$\displaystyle f(420)=5\cdot{0.5}^{3}$

By using calculator we acquire:

$\displaystyle f(420)=0.625$

hence, the remaining sample after 420 days is 0.625 kg

4 0

3 years ago

Percents

LUCKY_DIMON [66]

Given that,

Michael is leaving a 15% tip for his waitress.

To find,

What percent of the original price will he pay.

Solution,

Let the original price was 100%.

When he leaves a 15% tip for the waitress, he is really paying 100%+15%=115% of the original price.

$115\%=\dfrac{115}{100}\\\\=1.15$

$\dfrac{115}{100}=\dfrac{23}{20}$

So, this is the required solution.

8 0

3 years ago

the distance between california and mexico border is 100 miles less than thrice the distance between california and washington.

harina [27]

Answer: B. 3m-100

Step-by-step explanation:

3 0

1 year ago

IM BEGGING FOR HELP! I AM SO CONFUSED I WILL AWARD YOU BRAINLIEST ANSWER IF YOU ANSWER THIS QUESTION PLEASE!!!! SOS!! (P.S. sorr

umka2103 [35]

32 floors
32*11=total feet from ground to top
h=297-4.4t
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3 years ago

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|4| |-4|, greater than, less than, or equal to?

vovikov84 [41]

The absolute value is always positive, so the numbers would be 4 and 4.
Those are two equal numbers so it is: equal to
Hope this helps.

6 0

3 years ago

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