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Natali [406]
3 years ago
7

Help me please please help me please thank you

Mathematics
1 answer:
Nikolay [14]3 years ago
4 0

Answer: 7 r 1

Step-by-step explanation:

How many times does 2 go in 15 but the answer is

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How many 8s go into 293 cause i cant work it out so far?
ratelena [41]
Try multiplying it
we know that 8 times 10=80 so multiply 80 by 2, then 3 then 4 untill you get close to that number so
80 times 2=160
80 times 3=240
80 times 4=320
this is over so it is more than 30 8's but less than 40 8's
so start from 320
subtract 293 from 320
320-293=27
divide 27 by 8
27/8=3 and 3/8
add that to 30

33 and 3/8 8's will fit

the teacher probably wants how many whole 8's can fit so get rid of the 3/8 and just put 33 8's
4 0
3 years ago
Element X decays radioactively with a half life of 9 minutes. If there are 610grams of
Nookie1986 [14]

A half-life of 9 minutes corresponds to a decay factor <em>k</em> such that

\dfrac12=e^{9k}\implies k=-\dfrac19\ln\left(\dfrac12\right)

Then the time it takes for the substance to decay from 610 g to 124 g is time <em>t </em>such that

124\,\mathrm g=(610\,\mathrm g)e^{kt}

Solve for <em>t</em> :

\dfrac{62}{305}=e^{kt}

\ln\left(\dfrac{62}{305}\right)=kt

t=\dfrac1k\ln\left(\dfrac{62}{305}\right)\approx20.686

so it takes about 20.7 min for the 610 g sample to decay down to 124 g.

4 0
3 years ago
F(x)= (x+1)/2
xeze [42]

9514 1404 393

Answer:

  g(f(x)) = x . . . so the functions are inverses

Step-by-step explanation:

Two functions f and g are inverses of each other if ...

  g(f(x)) = x   or   f(g(x)) = x

We are asked to evaluate g(f(x)). That will be x if the functions are inverses.

  g(f(x)) = g((x+1)/2) = 2((x +1)/2) -1 = (x +1) -1

  g(f(x)) = x . . . . the functions are inverses

4 0
2 years ago
Find each percent of change. Round to the nearest whole percent if necessary. State whether the percent of change is an increase
Goryan [66]

Answer:

decrease

Step-by-step explanation:

5 0
3 years ago
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List all the prime numbers between 80 and 100
oee [108]

Answer:

81,83,85,87,89,91,93,95,97,99

4 0
3 years ago
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