Question

1) 4/a=16/20 2) с/8=25/40 3) 39/27= b/9 4) 49/32=12/d

Answer 1

Ответ:

на фото..................

Answer 2

To solve the given equations, we can use the concept of cross-multiplication, where we multiply the numerator of one side by the denominator of the other side. Let's solve each equation step by step:

1. 4/a = 16/20

Cross-multiplying, we have:

20 * 4 = 16 * a

80 = 16a

Dividing both sides by 16:

80/16 = a

a = 5

So the solution to this equation is a = 5.

2. c/8 = 25/40

Cross-multiplying, we have:

40 * c = 25 * 8

40c = 200

Dividing both sides by 40:

40c/40 = 200/40

c = 5

So the solution to this equation is c = 5.

3. 39/27 = b/9

Cross-multiplying, we have:

27 * b = 39 * 9

27b = 351

Dividing both sides by 27:

27b/27 = 351/27

b = 13

So the solution to this equation is b = 13.

4. 49/32 = 12/d

Cross-multiplying, we have:

32 * 12 = 49 * d

384 = 49d

Dividing both sides by 49:

384/49 = d

d ≈ 7.83 (rounded to two decimal places)

So the solution to this equation is d ≈ 7.83.