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galben [10]
3 years ago
8

which one of following statement expresses a true proportion 3:4=9:12 b. 2:1=1:2 c. 7:9=8:9 d. 54:9=6:3

Mathematics
1 answer:
Flura [38]3 years ago
3 0
A is the right one:
a. 3:4=9:12
    3×3:4×3=9:12
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<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B5%7D%7B6%7D%20%20%2B%20%28%20%5Cfrac%7B4%7D%7B9%7D%20%29%20-%20%28%20-%202%29" id
Lady_Fox [76]

get a common denominator of 18

5/6 * 3/3 +4/9 * 2/2 - -2*18/18

15/18 +8/18 + 36/18

23/18 + 36/18

59/18

change to a mixed number

18 goes into 59 3 times with 5 left over

3 and 5 /18

6 0
3 years ago
Identify the domain and range:
Y_Kistochka [10]

Answer:

Domain: [3, ∞)

Range: [-1, ∞)

Step-by-step explanation:

lmk if you want an explanation

6 0
2 years ago
What is the solution to the given equation? X^2+3x+7=0
Gekata [30.6K]

Answer:

-19

well i think it the answer

7 0
3 years ago
Plz help me -5(y+2)&lt;60
kkurt [141]

Answer:

y > -14

Step-by-step explanation:

-5(y+2) < 60

-5y - 10 < 60 (Expand the term on the left)

-5y < 70 (Bring the numbers to the right)

y > -14 (Divide both sides by -5. Note that the inequality sign changes as we are dividing by a negative number)

Hence Answer is <u>y > -14</u>

5 0
3 years ago
What is the value of b?<br> b<br> B+42<br> B-20
Oduvanchick [21]

Answer:

b=22°

Step-by-step explanation:

because b+42=b+b-20

b+42=2b-20

b-2b=-20-42

-b=-22

b=22°

4 0
3 years ago
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