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3 years ago

Julio can buy a box of 20 pencils for $2.80. What is the unit rate in dollars per pencil?

Mathematics

1 answer:

Mice21 [21]3 years ago

3 0

Answer:

$0.14

Step-by-step explanation:

When you divide the cost of pencils to the amount the pencils is the amount of each pencil.

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Twenty-one boys and eight girls go on a camping trip. In how many ways can a group of six be selected to gather firewood, given

lorasvet [3.4K]

(a) there are 8C2 = 28 ways of picking 2 girls from 8
And there are 21C4 = 5985 ways of picking 4 boys

Required number of ways for 2g / 4b = 28 * 5985 = 167,580

(b) at least 2 girls means combinations of 2g/4b , 3g,3b , 4g/2b , 5g 1b or
6 girls.

2g/4b = 167,580 ways
3g/3b = 8C3 * 21C3 = 56 * 1330 = 74,480
4g/2b = 8C4* 21C2 = 70 * 210 = 14,700
5g 1b = 8C5* 21 = 56*21 = 1176
6 girls = 8C6 = 28

adding these up we get the answer to (b) which is 257,964

6 0

3 years ago

Which is equivalent to 21.76 grams per minute?

Tomtit [17]

1.3056 kg/hour

sorry i took so long

6 0

3 years ago

5. Maribel makes bead necklaces. She uses a

sleet_krkn [62]

Answer:

<u>A. 52 green beads; 39 yellow beads</u>

Step-by-step explanation:

See the attachment. If we take the ratios of 4, 2 , and 3, they add to 9. The

Green (G), Blue (B), and Yellow (Y) will have 4/9, 2/9 and 3/9 each of the total beads, 117.

G: 52 Beads

B: 26 Beads

Y: 39 Beads

6 0

2 years ago

Join my G i m k i t Code is 85963

Ludmilka [50]

Answer

I joined but it said it was full

7 0

3 years ago

The park and movie theater are 3.4 inches apart on a map. If the map has a scale of 0.25 inch = 5 miles, find the actual distanc

lianna [129]

The actual distance between park and movie theater is 68 miles, if the park and movie theater are 3.4 inches apart on a map and the map has a scale of 0.25 inch = 5 miles.

Step-by-step explanation:

The given is,

Park and movie theater are 3.4 inches apart

Map has a scale of 0.25 inch = 5 miles

Step:1

Formula to calculate the number of scales for distance between park and theater,

$= \frac{Distance in map}{Scale value of map}$

$= \frac{3.4}{0.25}$

= 13.6

number of scales for distance between park and theater = 13.6

Step:2

Formula to convert distance inches to miles

$= Number of scale$ × $Equivalent value inches to miles$

= 13.6 × 5

= 68

Actual distance between park and theater = 68 miles

Result:

The actual distance between park and movie theater is 68 miles, if the park and movie theater are 3.4 inches apart on a map and the map has a scale of 0.25 inch = 5 miles.

6 0

4 years ago