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3 years ago

What is a decimal that is equivalent to the expression (3 x 10) + (4•1) + ( 7 • 1/10) + ( 5• 1/100)

Mathematics

1 answer:

riadik2000 [5.3K]3 years ago

6 0

The decimal form of the answer to that expression is

34.75

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Determine if the sequence is arithmetic. If it is, find the common difference. Is the sequence a function ?

BaLLatris [955]

$6)\\r=a_{n+1}-a_n\to r=a_2-a_1=a_3-a_2=a_4-a_3=...\\\\a_1=-7;\ a_2=-10;\ a_3=-11;\ a_4=-13\\\\a_2-a_1=-10-(-7)=-10+7=-3\\a_3-a_2=-11-(-10)=-11+10=-1\\\\a_3-a_2\neq a_2-a_1\\\\\text{It's not an arithmetic sequence}$

$\r=\dfrac{a_{n+1}}{a_n}\\\\r=\dfrac{a_2}{a_1}=\dfrac{a_3}{a_2}=\dfrac{a_4}{a_3}=...\\\\8.)\\a_1=4;\ a_2=20;\ a_3=100;\ a_4=500\\\\r=\dfrac{20}{4}=\dfrac{100}{20}=\dfrac{500}{100}=5\\\\10.)\\a_1-30;\ a_2=-45;\ a_3=-50;\ a_4=-65\\\\\dfrac{a_2}{a_1}=\dfrac{-45}{-30}=\dfrac{3}{2}\\\\\dfrac{a_3}{a_2}=\dfrac{-50}{-45}=\dfrac{10}{9}\\\\\dfrac{a_2}{a_1}\neq\dfrac{a_3}{a_2}\\\\\text{It's not a geometric sequence}$
$12.)\\a_1=-7;\ a_2=-14;\ a_3=-21;\ a_4=-28\\\\\dfrac{a_2}{a_1}=\dfrac{-14}{-7}=2\\\\\dfrac{a_3}{a_2}=\dfrac{-21}{-14}=\dfrac{3}{2}\\\\\dfrac{a_2}{a_1}\neq\dfrac{a_3}{a_2}\\\\\text{It's not a geometric sequence}\\\\\text{It's a function}$

8 0

3 years ago

On her first two quizzes Barbara averaged nine correct answers on the next 3 quizzes she averaged 10 correct answers what decima

kolbaska11 [484]

Answer:

0.98

Step-by-step explanation:

Assuming the number of questions on all the tests is 10,

9+9+10+10+10 / 50

You get 50 by doing 5 quizzes x 10 questions per quiz.

48/50 = 0.98

4 0

3 years ago

__x90.3=903<br><br> __x90.6=906 <br> What goes in the blanks

Maslowich

10 x 90.3 = 903
10 x 90.6 = 906

6 0

3 years ago

The family size bottle of sunscreen holds 12 fluid ounces (fl oz) of sunscreen. the regular bottle holds 75% less. how many fewe

konstantin123 [22]

Answer:

Step-by-step explanation:

12×0.75=9

6 0

3 years ago

5. Suppose the probability distribution for X = number of jobs held during the past year for work

Sergeu [11.5K]

Answer:

what is x equal to

Step-by-step explanation:

for example x= 3

and then you put

f(3)= slope + y - intercept

see how i changed f(x) to f(3) becuase the x was 3 and i put it there

8 0

3 years ago