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lianna [129]
3 years ago
7

in a set of 5 numbers the average of two is 12 the average of the other 3 is 7 what is the average of all five numbers. (fractio

n or whole number)​
Mathematics
1 answer:
UNO [17]3 years ago
3 0

Answer:

The average of all 5 numbers is  9

Step-by-step explanation:

Two of the numbers average 12. That means that their total is 2*12 = 24

Three of the other numbers average 7. That means that their total is 7*3 = 21

The total score for the 5 numbers is 24 + 21 = 45

The average for all 5 numbers is 45/5 = 9

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2 + 2 =? i need help
OLga [1]

Answer:

4

Step-by-step explanation:

Think of it this way. You have 2 sets of 2.

I I (This represents two)

I I (This represents the other two)

When you combine these, you get:

I I I I

If you count the tally marks, your answer is 4.

5 0
3 years ago
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I need some help!lol
svetlana [45]
Wht do you need help with exactly ?
7 0
3 years ago
1.825 rounded to the nearest hundredth
Alenkinab [10]
The answer is 1.83
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4 0
3 years ago
Solve for the unknown variable 2/5(3x-4)=-4
Elanso [62]

Answer:

x = -2

Step-by-step explanation:

Solve for x:

(2 (3 x - 4))/5 = -4

Multiply both sides of (2 (3 x - 4))/5 = -4 by 5/2:

(5×2 (3 x - 4))/(2×5) = -4×5/2

5/2×2/5 = (5×2)/(2×5):

(5×2)/(2×5) (3 x - 4) = -4×5/2

5/2 (-4) = (5 (-4))/2:

(5×2 (3 x - 4))/(2×5) = (-4×5)/2

(5×2 (3 x - 4))/(2×5) = (2×5)/(2×5)×(3 x - 4) = 3 x - 4:

3 x - 4 = (-4×5)/2

(-4)/2 = (2 (-2))/2 = -2:

3 x - 4 = 5×-2

5 (-2) = -10:

3 x - 4 = -10

Add 4 to both sides:

3 x + (4 - 4) = 4 - 10

4 - 4 = 0:

3 x = 4 - 10

4 - 10 = -6:

3 x = -6

Divide both sides of 3 x = -6 by 3:

(3 x)/3 = (-6)/3

3/3 = 1:

x = (-6)/3

The gcd of -6 and 3 is 3, so (-6)/3 = (3 (-2))/(3×1) = 3/3×-2 = -2:

Answer:  x = -2

6 0
3 years ago
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What is the solution to the system of equations graphed below <br> Y=2x-7 y=-x-1
Aleksandr-060686 [28]

Answer:

x=2

y=-3

Step-by-step explanation:

3 0
3 years ago
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