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11111nata11111 [884]
2 years ago
15

Ashley has scored 81, 74, 72, and 93 on her previous four tests. What score does she need on her next test so that her average (

mean) is 79?
Mathematics
1 answer:
charle [14.2K]2 years ago
6 0

Answer:

75

Step-by-step explanation:

Add 81, 74, 72, and 93 together

add 75 to that total

divide by 5

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An adult African elephant weighs 8.25 tons, how much do 27 elephants weigh
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I do believe that you would multiply the number of elephants by how much one weighs on average.. That would mean 8.25x27 which would equal 222.75
5 0
3 years ago
Read 2 more answers
The next week, she bought 9 sandwiches to split between 4 teachers. What fraction of a sandwich will
antiseptic1488 [7]

Answer: The teachers will get 2 and 1/4 of a sandwich

Step-by-step explanation:

8 0
3 years ago
0=x^2-4x+3 how many roots does this equation have
mars1129 [50]

Answer:

No complex roots; 3 real roots

Step-by-step explanation:

If a third order polynomial has any complex roots, then as a rule it has 1 real root and 2 complex roots.  In this particular case, the polynomial has three real roots, as can be determined by graphing the function.  The graph crosses the x-axis in 3 places.

5 0
3 years ago
37. Two years ago, Bob flew 6 x 105 miles in an airplane. This was 15 times as many
gogolik [260]

Answer:

  A.  4·10⁴

Step-by-step explanation:

The problem statement tells you ...

  6×10⁵ miles = 15 × (last year's mileage)

Dividing by 15 gives ...

  (60×10⁴ miles)/15 = (last year's mileage) = 4×10⁴ miles

_____

<em>Further explanation</em>

An exponent is an indication of repeated multiplication.

  10⁵ = 10·10·10·10·10 = 100,000

We can use the associative property of multiplication to rewrite the number of miles:

  6×10⁵ = 6·(10·10·10·10·10) = 600,000 = (6·10)·(10·10·10·10) = 60×10⁴

3 0
3 years ago
The sum of two numbers is seventeen. Three less than three times the smaller is equal to the larger
tia_tia [17]
The numbers are 5 and 12.
Smaller number = x
Larger number = y
x +y =17
y = 3x - 3
x +3x -3 = 17
4x = 20
x = 5
smaller number is 5
y = 3(5) - 3
y = 12
larger number is 12.
8 0
3 years ago
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