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Anton [14]
3 years ago
14

Carlos has scored 83, 81, and 73 on his previous three tests. What score does he need on his next test so that his average (mean

) is 83 ?
Mathematics
1 answer:
disa [49]3 years ago
8 0

Answer:

95

Step-by-step explanation:

let x be his mark in the fourth test, then

mean = \frac{83+81+73+x}{4} = 83 ( multiply both sides by 4 )

83 + 81 + 73 + x = 332

237 + x = 332 ( subtract 237 from both sides )

x = 95


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sattari [20]
24 x O = 72

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6 0
2 years ago
i keel asking for the dang answer why wont anyone tell me it a store sells pencils pens and markers that sells two times as many
babunello [35]

Answer:

Pencils = 325 ; Pens = 975 ; Markers = 650

Step-by-step explanation:

Let :

Number of Pencils = x

Number of pens = y

Number of markers = z

2 times as many markers as pencils

z = 2x

3 times as many pens as pencils

y = 3x

x + y + z = 1950

Write z and y in terms of x in the equation :

x + 3x + 2x = 1950

6x = 1950

Divide both sides by 6

6x / 6 = 1950 / 6

x = 325

Number of pencils = 325

Pens = 3 * 325 = 975

Markers = 2 * 325 = 650

Pencils = 325 ; Pens = 975 ; Markers = 650

6 0
2 years ago
Can someone help please!
Tcecarenko [31]

Answer:

7*(1/10)=   the third one

Step-by-step explanation:

7 0
3 years ago
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A computer downloads a 48 kilobyte file in 5 seconds. At this rate, how long will it take the computer to download a file that i
docker41 [41]
The answer is 12.5 seconds.

48/5 = 120/x
x = 2.5
2.5 * 5 = 12.5
4 0
2 years ago
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miss Akunina [59]

Answer:

the 2nd one

Step-by-step explanation:

2*3x is 6x

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equation is 6x+8

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3 years ago
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