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vfiekz [6]
3 years ago
15

a student achieved the following grades on his tests :87,95 ,76 and 88 percent . he wants 85 percent or better overall . what gr

ade should he must get in his last test to achieve that average
Mathematics
2 answers:
Pachacha [2.7K]3 years ago
8 0

Answer:

Atleast 79

Step-by-step explanation:

Average 》 85

If 5 tests,

Sum 》 85×5

Sum 》 425

Let the fifth test score be X

X + 87 + 95 + 76 + 88 》 425

X 》425 - 346

X》79

m_a_m_a [10]3 years ago
4 0

Answer:

Step-by-step explanation:

87+95+76+88+x/5=85

346+x=85x5

x=425-346

x=79

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The mean vitamin C level for 20 dogs was 7.6 milligrams per liter, with a standard deviation of 2.1 milligrams per liter.
SpyIntel [72]

Answer:  The mean increases.

Step-by-step explanation:

The value of 0.9 mg/L is very low compared to a means of 7.6 mg/L with a standard deviation of 2.1 mg/L.  It seems as though it is an outlier that is suffiently different from the others, and probably should be dropped from the data set.  That would do 2 things:  1) the stabdard deviation will likely decrease, indicating a more confident data set, and 2) the mean vitamin C level will increase.

5 0
2 years ago
The area of a circle is 77.28m2.<br> Find the length of the diameter rounded to 1 DP.
allochka39001 [22]

Answer:diameter=9.92m

Step-by-step explanation:

Area=77.28

π=3.14

Area=π x (d/2)^2

77.28=3.14 x (d/2)^2

Divide both sides by 3.14

77.28/3.14=(3.14x(d/2)^2)/3.14

24.6=(d/2)^2

Take them square root of both sides we get

d/2=√(24.6)

d/2=4.96

d=4.96 x 2

d=9.92

4 0
3 years ago
Need help with #5 please
adell [148]

Answer:

the answer is 5/6 also knows as answer #3

Step-by-step explanation:

because there is 6 sides #s 1-6

6 0
3 years ago
Which type of triangle has one angle with a measurement greater than 90°?
masya89 [10]
Answer:
Obtuse-angled triangle

Explanation:
Triangles can be classified based on the measures of their angles as follows:
1- Right-angled triangle: Triangle that has one of its angles = 90°
2- Acute-angled triangle: Triangle that has all of its angles less than 90°
3- Obtuse-angled triangle: Triangle that has one of its angles greater than 90°

The attached image shows an obtuse-angled triangle. We can note that measure ∠B is greater than 90°

Hope this helps :)

7 0
3 years ago
Read 2 more answers
Two California landmarks, Mt Whitney and Death Valley, are the highest and lowest points in lower 48 states. The difference in e
Varvara68 [4.7K]
We can find out he answer to the question by using the information given.
Since we know that Death Valley is the lower of the two spots, we can assume that we can add the difference in elevation to Death Valley to get the elevation of Mt Whitney.
-86+4,504=4,418
Th elevation of Mt Whitney is 4,418 meters above ground.
Hope this helps!
5 0
3 years ago
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