All categories

3 years ago

2. MARBLES The ratio of blue marbles to white marbles in a bag is 4 to 5.

Mathematics

2 answers:

Paladinen [302]3 years ago

8 0

Answer:

There are 12 marbles

Step-by-step explanation:

blue : white

4 : 5

White = 15

x : 15

So,

4/5 = x/15

Cross multiply,

4 × 15 = 5 · x

60 = 5x

60 / 5 = x

12 = x

4 : 5 = 12 : 15

ohaa [14]3 years ago

5 0

4 blue marbles. 5 white marbles. 5/15=3. 3x4=12. i think it’s 12 marbles.

You might be interested in

What is the Area of Triangle RST? Round your answer to the nearest tenth. *

MaRussiya [10]

Answer:

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

A neighborhood development that is 4 acres is to be divided into 2/3 acre lots. How many lots can be created?

mihalych1998 [28]

6 lots can be created

Solution:

Given that neighborhood development that is 4 acres is to be divided into $\frac{2}{3}$ acre lots

To find: number of lots created

From given information,

Total acres = 4

one lot = $\frac{2}{3} \text{ acres }$

So number of lots created can be found by dividing the total acres by acre of 1 lot

Thus the formula is:

$\text{ Number of lots } = \frac{\text{ total acres }}{\text{ acre of 1 lot }}$

Substituting the values we get,

$\text{Number of lots } = \frac{4}{\frac{2}{3}} = 4 \times \frac{3}{2} = 6$

Thus 6 lots can be created

6 0

4 years ago

Solve the equation 15x + 22 = 7x +62

pochemuha

Answer:

hope it helps you........

3 0

3 years ago

Read 2 more answers

The boat sailed 30min upstream and sailed 60km, and returned the same distance downstream (60km) and sailed it in 20min. Find th

elena55 [62]

Answer:

Step-by-step explanation:

b and c are the speeds of the boat and current, respectively.

Traveling upstream, the boat moves b-c km per hour.

Traveling downstream, the boat moves b+c km per hour.

b-c = (60 km)/(½ h) = (120 km)/h

b+c = (60 km)/(⅓ h) = (180 km)/h

Adding the equations together,

2b = (300 km)/h

b = (150 km)/h

c = (30 km)/h

7 0

3 years ago

Solve. Write your answer in simplest form.

docker41 [41]

Answer:

7 out of 9

Step-by-step explanation:

this because 2 out of 9 tells us there are 9 marbles.Since the number of yellow ones is 2 the the probability of non- yellow ones is (4+3)÷9

8 0

3 years ago

Read 2 more answers