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Akimi4 [234]
2 years ago
15

The average of 3 numbers is 15 two of the numbers are 7 and 10 what is the third number?

Mathematics
1 answer:
Zielflug [23.3K]2 years ago
8 0

9514 1404 393

Answer:

  (b)  28

Step-by-step explanation:

The total of the 3 numbers will be 3×15 = 45. Then the third number is ...

  45 -7 -10 = 28

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Yumi and Juan pick up litter along the highway at the same rate. Yumi picks up litter for 3 miles and takes two hours longer tha
oksano4ka [1.4K]
Juan's time = x
Yumi's time = x + 2
Yumi's distance = 3 miles
Juan's distance = 2 miles
Rate = distance/time
Juan's rate = 2/x
Yumi's rate = 3/(x + 2)
The rates are equal so:
2/x = 3/(x + 2)
2x + 4 = 3x
x = 4 hours
Yumi's time = 4 + 2 = 6 hours
The answer is D.
3 0
2 years ago
Read 2 more answers
A tortoise is walking in the desert. It walks for 15.36
timama [110]
2.56 minutes 6 meters a minute÷ 15.36 meters =?
4 0
3 years ago
Solve for the variables and show work please
olga nikolaevna [1]

Answer:

e=30

k=15/2

h=90

Step-by-step explanation:

3e=60

e=30

30+4k=60

4k=30

k=15/2

15/2+2h=30

2h=45/2

h=90

7 0
2 years ago
A ladder is leaning against a building so that the top of the ladder is touching the roof line. The bottom of the ladder is 8 fe
Scorpion4ik [409]

Answer: 15 ft

Step-by-step explanation:

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4 0
2 years ago
Graph the system of equations on your graph paper to answer the question.
scZoUnD [109]
<span>y=x-4
y=-x+6 
---------------------
Substitute x - 4 for y in </span>y=-x+6 
x-4=-x+6<span>
--------------------------------
Add X on each side
</span><span>x-4+x</span>=-<span>x+6+x
</span>2x - 4 = 6
--------------------------------------
Add 4 on each side
<span>2x-4+4</span>=<span>6+4
</span>2x = 10
------------------------------------------------
Divide by 2 on each side
2x ÷ 2 = 10 ÷ 2
x = 5
Now we have X
================================================================
To find Y we substitute 5 for x in y=<span>x-<span>4
</span></span>y = 5 - 4
y = 1
-----------------------------------------------------
Your answers are Y = 1 and X = 5

8 0
3 years ago
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