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blondinia [14]
3 years ago
6

Estimate 13/20-3/10=

Mathematics
1 answer:
maxonik [38]3 years ago
8 0
13/20-3/10 find LCD 
13/20-2*3/20 
13-2*3/20 combine 
7/20 or  (0.35)


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Tammy has scored 82, 78, and 93 on her previous three tests. What score does she need on her next test so that her average (mean
Lyrx [107]

Answer:

She needs a grade of 71 on her next text.

Step-by-step explanation:

Mean of a data-set:

The mean of a data-set is the sum of all values in the data-set divided by the number of values.

Tammy has scored 82, 78, and 93 on her previous three tests.

Thus, her grades are 82, 78, 93 and x, in which x is her grade in the fourth test.

There are 4 tests.

What score does she need on her next test so that her average (mean) is 81?

We have to find x when the mean is 81. So

\frac{82 + 78 + 93 + x}{4} = 81

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x = 324 - 253

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She needs a grade of 71 on her next text.

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3 years ago
On a particular Saturday, 60% of the visitors to an art museum were students. If 144 students visited the museum, how many total
pentagon [3]
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3 years ago
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UNO [17]

Answer:

9 1/3

Step-by-step explanation:

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2 years ago
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Step-by-step explanation:

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102 = 2[(2)(3) + (3)(h) + (h)(2)]

51 = 6 + 3h + 2h

45 = 5h

Height h = 9 cm

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2 years ago
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alukav5142 [94]

Answer:

63

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Step-by-step explanation:

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