$\frac{ab}{ad} = \frac{bc}{de} \\ \frac{10}{10 + bd} = \frac{12}{21} \\ 12 \times (10 + bd) = 21 \times 10 \\ 120 + 12bd = 210 \\ 12bd = 210 - 120 \\ 12bd = 90 \\ bd = \frac{90}{12} \\ bd = 7.5 \\$

<h3>#CMIIW</h3>

3 0

1 year ago

Seven pipes empty a water tank in five days. In how many days would four pipes empty this tank?

gayaneshka [121]

Answer:

8.75 days

Step-by-step explanation:

7/4=1.75

1.75*5=8.75

5 0

1 year ago

Jane Marko buys a car for $43,900.00. In three years, the car depreciates 48% in value. How much is the car worth in three years

raketka [301]

Answer is C, $22828.00

4 0

1 year ago

Read 2 more answers

Original price: 50; markdown: 22%; retail price

Minchanka [31]

If you're asking for the retail price after it's marked down, this is how you do it:

50(22%)=11

That means that there's a reduction of $11, so you subtract 11 from 50

50-11=39

The price is $39

6 0

1 year ago