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kupik [55]
3 years ago
5

On a test, the marks for ten students are: 2 students, 85%; 4 students, 78%; 3

Mathematics
1 answer:
anzhelika [568]3 years ago
6 0

Answer:

77.2%

Step-by-step explanation:

The average formula is:

Average = \frac{Sum/of/all/numbers}{How/many/numbers/there/are}

Let's first find the sum of all the numbers (remember sum means to add):

(2)(85) + (4)(78) + (3)(66) + 92 = ?

170 + 312 + 198 + 92 = 772

There are marks for 10 students so that is what goes at the bottom (10 students, 10 test scores)

Plug both things into the equation:

Average = \frac{772}{10} \\= 77.2

Therefore, the average mark on the test was 77.2%

<em>Hope this helps!!</em>

<em>- Kay :)</em>

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barxatty [35]
If there is a graph or something that you can show me, I'd be more than happy to help you.
4 0
3 years ago
2. George estimates that each bale of hay in his field weighs 62.5 pounds on
saw5 [17]

Answer:

4 trips

Step-by-step explanation:

there are 892 bales of hay

each one weighs about 62.5 pounds

892 * 62.5 = 55,750

George's truck can only carry 8 tons

1 ton = 2,000 pounds

2,000 * 8 = 16,000 pounds

So,

55,750 / 16,000 = 3.484375

But since you can't make 3.484375 trips in a truck, round it up.

3.484375 rounded up equals 4

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7 0
3 years ago
Read 2 more answers
Please answer correctly !!!!!! Will mark brainliest !!!!!!!!!!!!!
Leni [432]

Answer:

At the time of launch height of the object was 60 meters.

Step-by-step explanation:

An object was launched from a platform and its height was modeled by the function,

h(x) = -5x² + 20x + 60

Where x = time or duration after the launch

At the time of launch, x = 0

So, by putting x = 0 in this equation,

h(0) = -5×(0) + 20×(0) + 60

h(0) = 60

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4 0
3 years ago
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levacccp [35]
I hope this helps you


A) 0 natural number



B) 4 square root of 4=4.2=8 whole number



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5 0
3 years ago
Read 2 more answers
Please help me solve this practice SAT question!
lord [1]

Answer:

t=5

Step-by-step explanation:

∵ (t,17) lies on (x,y) plane y=x²-3x+7,t>0

∴ 17=t²-3t+7

t²-3t+7-17=0

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t²-5t+2t-10=0

t(t-5)+2(t-5)=0

(t-5)(t+2)=0

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t>0

so t=5

6 0
2 years ago
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