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Aleks [24]
3 years ago
10

Niki scored a 78 on her first test and an 85 on her second. Niki forgot what she got on her third test bit she knows that her av

erage is an 85. What did she score on her third test? Write and sole an equation for this problem.
Mathematics
1 answer:
gregori [183]3 years ago
5 0
An average is written by the values / the amount of values.

We know there are 3 values, we know the numbers of 2, this can be modelled by the equation:

(78 + 85 + x)/3 = 85
We solve that ^:
(163+x)/3=85
163+x=255
x=92

The score on her 3rd test is 92

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Roman55 [17]

Answer:

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Step-by-step explanation:

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8 0
2 years ago
You order from a catalog the following office supplies: 10 boxes of paper, each box is 6 pounds and 36 boxes of pens, each box w
babymother [125]

$40.50 10 boxes at 6lbs = 60lbs

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6 0
2 years ago
A salesman earned commission of £2 520 for January. His rate of
Free_Kalibri [48]

Answer:

I'm sorry but I don't know English so I can't help you

Step-by-step explanation:

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6 0
2 years ago
Susie’s Sweet Shop sells chocolate boxes that contain three types of chocolate truffles: solid chocolate truffles, cream center
olganol [36]

Let us make a list of all the details we have

We are given

The cost of each solid chocolate truffle = s

The cost of each cream centre chocolate truffle = c

The cos to each chocolate truffle with nuts = n

The first type of sweet box that contains 5 each of the three types of chocolate truffle costs $41.25

That is 5s+5c+5n = 41.25 (cost of each type of truffle multiplied by their respective costs and all added together)

The second type of sweet box that contains 10 solid chocolate trufles, 5 cream centre truffles and 10 chocolate truffles with nuts cost $68.75

That is 10s+5c+10n = $68.75

The third type of sweet box that contains 24 truffles evenly divided that is 12 each of solid chocolate truffle and chocolate truffle with nuts cost $66.00

That is 12s+12n=$66.00

Hence option C is the right set of equations that will help us solve the values of each chocolate truffle.



6 0
3 years ago
For every how many degrees will a pentagon have rotational symmetry?
igor_vitrenko [27]
A. 72 degrees (i hope this helped)
7 0
3 years ago
Read 2 more answers
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