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BigorU [14]
3 years ago
7

6x+2y=-2 3x-2y=-5 What is the result of adding these 2 equations? PLEASE HELP

Mathematics
1 answer:
DochEvi [55]3 years ago
7 0

Answer: x=-7/9, y=4/3. (-7/9, 4/3).

Step-by-step explanation: 6x+2y=-2

3x-2y=-5

-----------------

9x=-7

x=-7/9

6(-7/9)+2y=-2

-42/9+2y=-2

2y=-2-(-42/9)

2y=-2+42/9

2y=-18/9+42/9

2y=24/9

y=(24/9)/2

y=(24/9)(1/2)

y=24/18

y=4/3

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3 years ago
An experiment has four groups and six observations in each group. What are the treatment degrees of freedom?a. 19b. 3c. 4d. 23e.
Arturiano [62]

Answer:

3

Step-by-step explanation:

This experiment has four groups. Each of these groups have six observations

Total number of observations = 4 x 6 = 24

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Therefore for this question, the treatment degrees of freedom is given as 3 and the correct answer option is b.

5 0
3 years ago
Read 2 more answers
for competition,the cheerleading team,is preparing a dance routine that must last 4 minutes,with a variation of +- 5 seconds. fi
Sonbull [250]

Ideal timeline of the dance routine = 4 minutes = 4 × 60 seconds = 240 seconds

Variation allowed in the dance routine timeline = +- 5 seconds

Let the timeline of the dance routine be T

⇒ 240 seconds - 5 seconds < T < 240 seconds + 5 seconds

⇒ 235 seconds < T < 245 seconds

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⇒ 3.92 minutes < T < 4.08 minutes

So the least possible time of the dance routine can be 3.92 minutes (or 235 seconds) and the greatest possible time of the dance routine can be 4.08 minutes (or 245 seconds)

3 0
3 years ago
Given that y varies directly with x and y = 42 when x = 14, find y when x =90.
Anvisha [2.4K]
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3 0
3 years ago
Joe says that x
irga5000 [103]
The equations x+5x=16
and x+5x+25=16
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6 0
3 years ago
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