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3 years ago

Ralph has a collection of dimes and quarters. The ratio of dimes to quarters is 4:5. If the number

Mathematics

1 answer:

Murrr4er [49]3 years ago

5 0

Answer:

180

Step-by-step explanation:

4 times 20 is 80, and 4 times 5 is 100, so add those together and that's the total number of coins

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Express 45 minutes as a fraction of 1 hour

Pepsi [2]

Answer:

$\frac{3}{4}$

Step-by-step explanation:

There are 60 minutes in 1 hour

To express as a fraction

$\frac{45}{60}$

Divide numerator/denominator by 15

$\frac{45}{60}$ = $\frac{3}{4}$

8 0

3 years ago

Andre wrote the inequality to plan his time. Describe what 3x + 10 ≤ 30 represent in this inequality.

Neporo4naja [7]

Step-by-step explanation:

7 0

3 years ago

The price of an item has dropped to

Deffense [45]

60% decrease.

$105-$42 = $63
$63/$105 = 0.6
0.6 x 100 = 60

8 0

3 years ago

Evaluate 3C1. a)3 b)1 c)2 d)6

murzikaleks [220]

Answer: Option a) 3

Step-by-step explanation:

The formula for calculating combinations is as follows

$nCr = \frac{n!}{r!(n-r)!}$

Where "n" is the amount of items in a set and you can choose "r" from them

3C1 reads as: The combination of 1 in 3. You have a set of 3 elements and choose 1 of them.

$n = 3\\\\r = 1$

So :

$3C1=\frac{3!}{1!(3-1)!}\\\\3C1=\frac{3!}{1!*2!}\\\\3C1=\frac{3*2*1}{1*2*1}\\\\3C1=3$

5 0

3 years ago

Numbered disks are placed in a box and one disk is selected at random. If there are 4 red discs numbered 1 through 4, and 2 yell

Yuliya22 [10]

Answer:

0.66 = 66%

Step-by-step explanation:

If we know that a odd-numbered disk is selected, we know that the number is 1, 3 or 5.

So, if it is a red disk, is can be number 1 or 3, so we have two possibilities.

If it is a yellow disk, it needs to be number 5, so we have just one possibility.

We have a total of 3 possibilities, and 2 of them are with red disks, so the probability is 2/3 = 0.66 = 66%

3 0

3 years ago