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3 years ago

6

Marcia has x number of homework problems. When she has done 10 of them, she is 1/4 finished. How many homework problems did she

have

1 answer:

professor190 [17]3 years ago

8 0

Answer:

so in 10 it is 1/4 so

here it's obvious if 10 in 1 then 40 in 4

so she have 40 problems

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If a train traveled at 50 meters within 120 seconds, what is its speed?

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v = 0.416 m/s

Step-by-step explanation:

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3 years ago

In the problem below, AB, CD, and EF are two-digit numbers, where A, B, C, D, E and F represent distinct digits from 1 to 9. Is

Oksi-84 [34.3K]

Answer:

<em>When both the conditions hold true, F is prime.</em>

Step-by-step explanation:

AB, CD, and EF are two-digit numbers, where A, B, C, D, E and F represent distinct digits from 1 to 9.

AB

+ CD

--------

EF

1st condition, B and D are consecutive.

Adding B and D gives us F.

Possible values can be (F being the unit value after adding not considering the carry over):

B + D = F

1+2=3

2+3=5

3+4=7

4+5=9

5+6=1

6+7=3

7+8=5

8+9=7

Here F is not prime (because 9 is not prime).

Now, let us consider the 2nd condition as well.

i.e. C = 8

For the following

AB

+ CD

--------

EF

C is 8 then A must be 1 because any value other than 1 for A will make the sum of A and C greater than 9 and there will be a carry which is not the case here.

So, E = 8 + 1 = 9

Now, B and D are consecutive and can not be 1, 8 or 9.

So, possible values are:

B + D = F

2 + 3 = 5

3 + 4 = 7

Here F is prime.

So, when both the conditions hold true, F is prime.

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3 years ago