2 years ago

Can someone help me with this task 50PTS!!!!

Mathematics

1 answer:

djverab [1.8K]2 years ago

8 0

Answer:

So sorry if what I solved is wrong .I did my best!

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A school wants to buy a chalkboard that measures 4 feet by 6 feet. The chalkboard costs $7.21 per square foot. How much will the

kkurt [141]

Area of chalkboard = 4 feet x 6 feet = 24 square feet.

Total cost = 24 square feet x $7.21 per square foot = $173.04

Answer: $173.04

5 0

3 years ago

In a given course a student receives preliminary examination grades of 81, 85, and 95. The final examination is weighed for one-

Vsevolod [243]

Answer:

B. 96

Step-by-step explanation:

Let x represent score of final third exam.

We have been given that in a given course a student receives preliminary examination grades of 81, 85, and 95.

Let us find average of preliminary scores.

$\frac{81+85+95}{3}=\frac{261}{3}=87$

We have been given that the final examination is weighed for one-third and the average of the preliminary grades is weighed as 2/3 of the final grade. This means that final grade is equally weighed into 3 parts. The two parts are 87 each and third part is x.

Using our given information, we can set an equation as:

$\frac{87+87+x}{3}=90$