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Andrei [34K]
3 years ago
15

1. Which ratios form a proportion? Use equivalent ratios to test each pair.

Mathematics
2 answers:
kifflom [539]3 years ago
3 0
The first one is C. 12/16, 15/20
^ _ ^
Blizzard [7]3 years ago
3 0

Answer:Which ratios form a proportion? Use equivalent ratios to test each pair.

A. 4/9, 2/3 B. 6/15, 9/12 C. 12/16, 15/20 D. 18/ 20, 24/30 2. Which ratio forms a proportion with 20/30? Use equivalent ratios to test each ratio.

A. 16/24 B. 10/20 C. 17/51 D. 16/60 3. Which ratios form a proportion? Use cross products to test each pair.

A. 15/40, 35/90 B. 18/22, 45/55 C. 12/55, 33/121 D. 17/31, 32/45 4. Which ratios form a proportion? Use cross products to test each pair.

A. 9/17, 27/50 B. 12/35, 24/75 C. 15/55, 32/121 D. 12/35, 20/70 5. Which ratios do not form a proportion? A. 24/96, 27/108 B. 17/102, 12/70 C. 21/51, 35/85 D. 45/75, 63/105.

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I keep messing this up for #13 I got (1/19, 35/38) and for #15 I got (2,-1) both of which I know are wrong, someone help me unde
valentinak56 [21]
2x  + y = x/2 + 1  multiply  this by -4:-
-8x - 4y = -2x - 4
4y         = 2x       Adding:-

-8x = -4
x = 1/2

Substitute in 4y = 2x:-

4y = 2*1/2

y = 1/4 

Answer ( 1/2, 1/4)
3 0
3 years ago
Solve for X <br><br> Will give brainiest
o-na [289]

Answer:

x = 6

Step-by-step explanation:

8x + 2 + 70 + 60 = 180

8x + 132 = 180

8x = 48

x = 6

7 0
3 years ago
7 times as much as sum of 1/3 and 4/5
Salsk061 [2.6K]
So the formula is
7*(1/3+1/5) = x

First find the common denominator of the fractions.  In this case the common denominator of 3 and 5 is 15 so we must convert them to 15ths.  To do that we divide 15 by the denominator and take that answer and multiply the numerator by it.

So for 1/3 we take 15/3(denominator) = 5 and multiply the numerator (1) by it

5 * 1 = 5 so 1/3 converts to 5/15

Do the same for 1/5 we take 15/5 = 3 and multiply the numerator (4) by it

3*4 = 12 so 4/5 converts to 12/15

Now we add 5/15 and 12/15 = 17/15 so we have our formula now to

7*17/15

We make seven a fraction 7/1 and multiply across 7*17 = 119 and 15 * 1 = 15

We have 119/15 which when we divide and get 7 14/15 as your answer
8 0
3 years ago
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vagabundo [1.1K]
49^2 or 7 I just know from 6th grade
6 0
3 years ago
What is the sum of 3,757 and 633?
Dmitry [639]
4,390 is the answer
I hope I helped!
5 0
3 years ago
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