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Irina18 [472]
3 years ago
11

A student has gotten the following grades on his tests: 87, 95, 86, and 88. He needs to have an average of 90 to receive an A fo

r the class. What is the minimum grade he must get on the last test in order to have an average of 90?
(Measures of Central Tendency and Dispersion)
Mathematics
1 answer:
PilotLPTM [1.2K]3 years ago
8 0
The student needs an average of 90 and he has the following grades :
87,95,86,88
in order to get a 90 average he has to get
 90x5=450
87+95+86+88+?=450,  356+?=450 , 450-356=94
the answer is 94
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Step-by-step explanation:

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1. Determine the magnitude of the resultant force acting on the plate and its direction, measured counter-clockwise from the pos
AlexFokin [52]
F1 . . . 100% of it = 900N is in the +x direction.

F2 . . . 70.7% of it (cos45°, 530.3N) is in the +x direction,
and 70.7% of it (sin45°, 530.3N) is in the +y direction.

F3 . . . 80% of it (520N) is in the -x direction,
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Total y-component:  530.3 + 390  =  920.3 N

Magnitude of the resultant = √ (x²  +  y²)

                                       = √(1950.3²  +  920.3²)

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Angle of the resultant, measured counterclockwise
from the +x axis, is 
 
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Caution:
The same fatigue that degrades my ability to READ the question accurately
may also compromise the accuracy of my solutions.  Before you use this
answer for anything, check it, check it, check it !

 
4 0
3 years ago
3q(p-q)+2r(p-q)-S(q-p)<br> Can u solve it step by step
Artyom0805 [142]

Answer:

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Step-by-step explanation:

first part

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second part

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third part

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then we put it all together

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in the right place possibly

-3q² + 3qp + 2rp - 2rq + Sq - Sp

8 0
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