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Sliva [168]
2 years ago
14

Reshma is making a necklace using green beads and purple beads in a ratio represented on the following double number line. Fill

in the missing values on the diagram and then answer the following question.
If Reshma uses 20 green beads, how many purple beads will she use?

Mathematics
1 answer:
klio [65]2 years ago
5 0

Answer: 4/5

Hope this helps you out! :)

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Alex was biking along a 48 mile trail. First half of the time he was biking twice as fast as the second half of the time. If he
nydimaria [60]

Answer:

The speed in the first part is 16 mph.

Step-by-step explanation:

The total distance is 48 miles. The total time is 4 hours.

In the second part of the trip, he was traveling at speed s for distance d for 2 hours.

In the first part of the trip he was traveling at twice the speed, or 2s, for distance 48 - d, for 2 hours.

speed = distance/time

distance = speed * time

First part of trip:

48 - d = 2s * 2

d + 4s = 48   Equation 1

Second part of the trip:

d = s * 2

d = 2s    Equation 2

Equations 1 and 2 form a system of equations in two unknowns, d and s.

d + 4s = 48

d = 2s

Substitute 2s for d in equation 1.

2s + 4s = 48

6s = 48

s = 8

The speed in the second part is 8 mph.

The speed in the first part is 2s = 2(8) = 16.

The speed in the first part is 16 mph.

Check:

d = 2s = 2(8) = 16

48 - d = 48 - 16 = 32

The second part is 16 miles. The first part is 32 miles.

16 miles at 8 mph takes 2 hours.

32 miles at 16 mph takes 2 hours.

2 hours + 2 hours = 4 hours.

Our answer is correct.

Answer: The speed in the first part is 16 mph.

7 0
3 years ago
Chuck built a garden in the shape of a rectangle in his backyard. The width of the garden is 7 feet and the length of the garden
Nastasia [14]
The answer is 25 because of the Pythagorean theorem. 49+576=625 625 squared=25
5 0
3 years ago
I neeeeeed heeeeelp plz
geniusboy [140]
The answer for number 4: Temperature is an average of average heat. Heat is the average kinetic energy and thermal energy is kinetic energy.  

(I can't see the answer for number 10... it would be good if you told me the question)
8 0
3 years ago
-7(-5x - 9) + 4x<br> Your answer
ASHA 777 [7]
35x - 63 + 4x
35x + 4x -63
39x - 63
8 0
3 years ago
Read 2 more answers
On Monday, the water was shut off 3 times for ¼ hours, 2/3 hours, and 1-3/4 hours, respectively. What was the total number of ho
galina1969 [7]

Answer:

2-2/3 hours

Step-by-step explanation:

1/4 + 2/3 + 1-3/4 = 1/4 + 2/3 + 7/4. Use common is 12, so we get 3+8+21/12 = 32/12. Simplify equal 8/3 or 2-2/3 hours!

3 0
2 years ago
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