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lozanna [386]
3 years ago
7

Solve for c. -3b+ac=c-4. Please show all work.

Mathematics
2 answers:
dangina [55]3 years ago
8 0
-3b + ac = c - 4
+ 4 - ac = - ac + 4

-3b + 4 = -ac + c

-ac + c = c(-a + 1)

-3b + 4/-a + 1 = c

i hope i explained it well
Luden [163]3 years ago
6 0
-3b+ac=4
Move c to the left and - 3b to the right
ac-c=-4+3b
Now factor by c at the left
c(a-1)=-4+3b
Divide the right by a-1
C=(-4+3b)/(a-1)
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Jasmin is adding 29 photographs to her album. How many sheets of the album will she use if each sheet holds 6 photographs? Can s
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3 years ago
For how many three digit numbers (100 to 999) is the sum of the digits even? (For example, 343 has an even sum of digits: 3 + 4
n200080 [17]

Answer:

there are 425 numbers of three digits whose the sum of the digits is even.

Step-by-step explanation:

Option 1:

It is necessary to accomplish one of the next conditions:

(1) all of the digits are even.

(2) exactly 2 of the digits are odd

Then, for the first condition:

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for the second condition:

(3C1)*5*5*5-1*5*5 =3*125-25=350

where 3C1 is a combination.  The 3C1 determines which of the three digits is even, and it is necessary to subtract the numbers under 100 with the other 2 digits odd.

So, there are 450 numbers of three digits whose the sum of the digits is even.

Option 2:

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4 0
3 years ago
Does the addition problem show a way to add 27 + 38?
Dmitry [639]

Answer:

a. yes

b. no

c. yes

d. yes

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For a, 27 + 38 can be broken apart. 27 is broken up by adding smaller numbers (20 + 7 = 27) and the same is done with 38 (30 + 8 = 38), so A and C shows a way to add 27 and 38. In C, the numbers are just put into a different order. B is not a way to add 27 and 38, because the sum is different.

27 + 38 = 65, however 20 + 70 + 38 = 128. The addition problem for D is a way to solve for 27 + 38, because it is broken up differently than A and C. They instead added the 20 and 30 together first, then split up 15 (from 8+7) into 10 and 5. So D is a way to solve, because it gets the same answer as 27 and 38 :D

8 0
3 years ago
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