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Alexxandr [17]
3 years ago
5

Solve the systems of equations using substitution. -3x + 2y = 12 x = 2y - 8

Mathematics
1 answer:
ankoles [38]3 years ago
4 0

-3(2y-8) + 2y = 12

-4y + 24 = 12

-4y = -12

y=3

x=2(3)-8

x=-2

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If 15 pen cost $3.90, which equation would help determine the cost of 6 pens?
madreJ [45]

Answer

1.56

Step-by-step explanation:

You must find the unit rate. To do so, you must divide 3.90 by 15. That will give you 0.26. After, times 6 and .26 to get your answer. Hope this helps.

8 0
3 years ago
The ratio of roses to carnations is 7 to 5. If 96 flowers are needed for table decorations,
coldgirl [10]

Answer: 56 roses and 40 carnations are needed.

Step-by-step explanation: <u>Here’s the table of ratios that’ll help you find how many roses and carnations are needed to make a total of 96 flowers for table decorations:</u>

7:5 /14:10 /21:15 /28:20 /35:25 /42:30 /49:35/ 56:40/

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2 years ago
Evaluate f(x - 2) when f(x) = 4x² - 4x – 2
ivann1987 [24]

Answer:

Step-by-step explanation:

8 0
3 years ago
Paul owes Paula 35 cents and has a pocket full of 5-cent coins, 10-cent coins, and 25-cent coins that he can use to pay her. Wha
kykrilka [37]
So, what is the case in which he uses the least coins? can he use 1 coin? no, there isn't a 35 cent coin. can he use 2 coins? yes! he can use 25+10 cent coins!

now, the largest number of coins means the coins of the smallest value: so using only 5 cent coins. How many would this be?

we have to divide:

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6 0
3 years ago
X/2.4+39=239<br> show work
grin007 [14]

Answer:  x = 480

Steps: x/2.4 + 39 = 239

Subtract 39 from both sides: x/2.4 + 39 - 39 = 239 - 39

Simplify: x/2.4 = 200

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Simplify: x = 480

Plz mark brainliest:)

3 0
2 years ago
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