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Pavel [41]
3 years ago
9

What is 4/20 + 6/10 =

Mathematics
2 answers:
leva [86]3 years ago
6 0
You want them to have the same denominator so your gonna multiply the numerator by 2 in the fraction 6/10 now the equation is
4/20 + 12/20 add 4+12 is 16
Now is
16/20 now you can simplify by 4
The Answer is 4/5
Serhud [2]3 years ago
3 0

Answer:

4/5

Step-by-step explanation:

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How can I solve a multi step equation ex. 4x-9=7x+12
harkovskaia [24]
First you bring the x to one side so u subtract 4x from 7x and you get the new equation as -9=3x+12 then you just solve and you get x is equal to -7
4 0
3 years ago
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What is 2x . 5x . 79x
murzikaleks [220]

Answer:

790x

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3 0
2 years ago
19. The present age of brother and sister are in the ration 4:5 Before three years the ration of their age was 3:4. find their p
Lyrx [107]

Answer:

Sister = 15 years old

Brother = 12 years old

Step-by-step explanation:

Right now, if the brother is B years old and the sister is S years old, B = (4/5)S because the ratio from brother to sister is 4:5, so if one unit is X, B = 4X and S = 5X

Three years ago, the brother was B-3 years old and the sister was S-3 years old. Keeping one unit as X, we have

B = 3X

S = 4X

B-3 = (3/4)(S-3)

Therefore, we have a system of equations

B = (4/5)S

B-3 = (3/4)(S-3)

Substitute (4/5)S for B into the second equation to only have one variable

(4/5)S - 3 = (3/4)(S-3)

(4/5)S - 3 = (3/4)S - 9/4

add 3 to both sides and subtract (3/4)S from both sides to isolate the variable and its coefficient

(1/20)S = 3/4

multiply both sides by 20 to isolate the S

S = 15

B = (4/5)S = 12

5 0
2 years ago
__mm x 9mm x 12mm=756mm
Anna [14]
7 mm x 9mm x 12mm = 756mm


To get this answer you have to multiply 9 and 12 which would be 108. Then you have to divide 108 on both sides to get mm by itself. 756 divided by 108 is 7 which is the answer!
3 0
2 years ago
Read 2 more answers
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