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Svetradugi [14.3K]
2 years ago
14

Can someone please help for brainlist

Mathematics
1 answer:
Paul [167]2 years ago
6 0

Answer:

keep going you got it

Step-by-step explanation:

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Lucy wants to be exempt from her semester exam. In order for that to happen, she has to average an 85 over 3 test grades. Her fi
anastassius [24]

Answer:

<em>Grades to be scored in 3rd exam = 88</em>

Step-by-step explanation:

Given that average of 3 numbers is 85.

First two numbers are 81 and 86.

To find:

3rd number so that average is 85

Solution:

Let the third number = x

Formula for average is:

Average = \dfrac{Sum\ of\ numbers}{Total\ count\ of\ numbers}

Here, sum of numbers = 81+86+x =167+x

Total count of numbers = 3

85 = \dfrac{167+x}{3}\\\Rightarrow x=255-167\\\Rightarrow \bold{x=88}

<em>Grades to be scored in 3rd exam = 88</em>

8 0
3 years ago
Help pls it’s easy I’m just slow lol
IgorLugansk [536]

Answer:

12.65

Step-by-step explanation:

4 0
3 years ago
What the definition of a circle
klasskru [66]
It depends, but most of the time it's<span> a round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point.</span>

4 0
3 years ago
(50 points) Could someone help me with this? Part A: Solve –mk – 90 &gt; 85 for m. Part B: Solve 3c – 5f = 55 for f. Show your w
PilotLPTM [1.2K]

A:

-mk - 90 > 85

-mk - 90 + 90 > 85 + 90

-mk > 175

-mk / k > 175 / k

-m > 175/k

-m * -1 < 175/k * -1

m < -175/k


Part B:

3c - 5f = 55

3c - 5f - 3c = 55 - 3c

-5f = 55 - 3c

-5f/5 = (55 - 3c) / 5

-f = 55/5 - 3c/5



6 0
3 years ago
Read 2 more answers
Answer by sunday plz!!
pentagon [3]

Answer:

y=3*x

Step-by-step explanation:

john bought 3 notebooks for 9 dollars

so 9/3=3

notebooks costed 3 dollars each

x-number of notebooks

y-cost of notebooks

so

y=3*x

because 3 dollar cost every notebook you could buy.

if i buy 2 notebooks

so x=2

y=3*2=6 dollars

if I buy 3 notebooks

then y=3*3=9 dollars

end this way continues

8 0
2 years ago
Read 2 more answers
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