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Inessa [10]
3 years ago
5

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

) is 81?
Mathematics
1 answer:
Lyrx [107]3 years ago
5 0

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

253 + x = 324

x = 324 - 253

x = 71

She needs a grade of 71 on her next text.

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Answer:

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Step-by-step explanation:

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2 years ago
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Find the equation of the exponential function represented by the table below : X Y
leva [86]

Answer:

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Step-by-step explanation:

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2 years ago
James is running on a trail that is 5/4 of a mile long. So far he has run 2/3 of the trail. How many miles has he run so far?
aalyn [17]
Step 1) You would need to convert your 2 fractions into equivalent numbers. In this case, the closet gcf (greatest common factor) is 12. So, 5/4 would convert to 15/12 and  2/3 converts to 8/12.

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Step 3) Usually, you would simplify your new fraction. In this case, our fraction doesn't simplify. It will stay 7/12 of a mile. For example, If our number had ended up being 4/12, then we would simplify it to 1/3 of a mile. Because, 4 divided by 4 is 1 and 12 divided by 4 is 3. You can't simplify your answer anymore.

Hope this helped!
3 0
3 years ago
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14) A solid metallic block measures 1.5m long, 0.4m wide and 0.25m high. The solid is made of
GREYUIT [131]

Answer:

<h3>The answer is </h3><h3 /><h3>1125 Kg</h3>

Step-by-step explanation:

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That's 7.5 g/cm³ = 7500kg/m³

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Volume of block = 1.5 × 0.4 × 0.25

= 0.15m³

mass = Density × volume

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<h3>= 1125 Kg</h3>

Hope this helps you

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Step-by-step explanation:

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2 years ago
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