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ANTONII [103]
3 years ago
6

Over 11.2 hours, the temperature changed −2.9 degrees each hour.

Mathematics
1 answer:
erica [24]3 years ago
5 0

Answer:

The answer to this is -32.48

Step-by-step explanation:

What you do first is remove the negative (-) in 2.9. Then multiply, 11.2 times (x) 2.9 equals (=) 32.48. Then you can put the negative (-) back. It should look like this -32.48.

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Two grapefruits and three oranges cost $1.95. Three grapefruits and two oranges cost $2.05.
geniusboy [140]

Answer:

  • one orange costs $0.35  and  one grapefruit costs $0.45

Step-by-step explanation:

<em>let grapefruits be g , let oranges be o</em>

so first equation:

→2g + 3o  = $1.95

→g = ($1.95 - 3o)/2

so second equation:

→ 3g + 2o = $2.05

→ g = ($2.05 - 2o)/3

Solving simultaneously:

→ ($2.05 - 2o)/3 = ($1.95 - 3o)/2

→ 2($2.05 - 2o) = 3($1.95 - 3o)

→ 4.1 - 4o = 5.85 - 9o

→ - 4o + 9o = 5.85 - 4.1

→ 5o = 1.75

→ o = $0.35

Therefore one orange costs $0.35

Then one grapefruit costs g → ($1.95 - 3o)/2

                                               → g = ($1.95 - 3(0.35))/2

                                               → g = 0.45

Therefore one grapefruit costs $0.45

4 0
2 years ago
20 POINTS! Which of the following equations shows how substitution can be used to solve the following system of equations?
natima [27]

Answer:

Is there a photo or no  

Step-by-step explanation:

5 0
3 years ago
Please helpp me (and explain if you can pls:) ) TYSMMM!!!!
Vedmedyk [2.9K]

Answer:

the last three

Step-by-step explanation:

cuz im big brains like that

5 0
3 years ago
Read 2 more answers
2x-3y=42 solve for y
PtichkaEL [24]

Answer:

y=14+(2/3x)

Step-by-step explanation:

Your main goal is to get Y by itself on one side.

To start subtract 2x from both sides. This will give you -3y=42-2x.

Then you divide both sides by -3 to get Y by itself.

That will leave you with ...

y=14+(2/3x)

(remember the negatives cancel each other out)

5 0
3 years ago
Read 2 more answers
The number of skiers, k, that visited a mountain one day was
Levart [38]

Answer:

k = 11b - 8 (easiest to understand)

extra:

k = -8 + 11b

or

11b = -8 - k

etc. ( anything mixing up the components of the equation ).

3 0
3 years ago
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