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marishachu [46]
3 years ago
10

Solnvethe inequality 2x2+ 5x-3>=0​

Mathematics
2 answers:
Nonamiya [84]3 years ago
8 0

Answer:

x ≥ 1/2

x ≤ -3

Step-by-step explanation:

2x² + 5x - 3 ≥ 0

Factor left side.

(2x - 1)(x + 3) ≥ 0

Set factors in an inequality to 0.

2x - 1 ≥ 0

2x ≥ 1

x ≥ 1/2

You multiply both sides by 2x - 1, so the sign switches.

x + 3 ≤ 0

x ≤ -3

mina [271]3 years ago
4 0

Answer:

Hello!

~~~~~~~~~~~~~~~~~~

Answer : x \leq -3     or x \geq \frac{1}{2}

Step-by-step explanation: Solve the inequality by finding the roots and creating test intervals.

Hope this helped you!

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Step-by-step explanation:

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6 0
3 years ago
Martin has a total of 19 nickels (50.05) and dimes ($0.10) worth $1.65. How many of each type of coin does he have?
mezya [45]

Answer: 19nickels and 7dimes.

Ps i really don’t know where the 50.05 came from if it is suppose to be there then I really don’t know how to solve this.

Step-by-step explanation:

Ok so if you know that there are 19nickels, let n=number of nickels.

The number of total coins subtracted by number of nickels will give you number of dimes.

165-number of nickels=number of dimes

Value of dimes=10(number of dimes) or total value of dimes/individual value (10cent)

Then you can substitute total as $1.65 and get the value of nickels by multiplying by 5cent ( my teacher taught me using whole numbers to make it easier so I turned $1.65 to 165 cent). Since the value of the dimes is the value of nickels subtracted from the total, I can subtract 95 from 165 and divide the difference by 10, to get the number of dimes.

5(n)=5(19)=95

(165-95)/10=number of dimes

70/10=7dimes

You can check by multiplying 7x10 and 5x15 again and adding them together to see if they equal 165 cent.

4 0
3 years ago
Subtract:<br> 3 3/5 -1 1/1<br> 1 1/10<br> 2 1/10<br> 2 1/5<br> 2 2/3
VARVARA [1.3K]

Step-by-step explanation:

3 3/5 - 1 1/10

3 6/10 - 1 1/10

2 2/10= 2 1/5 is the answer

5 0
3 years ago
YO help a girl out
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Answer:

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7y+42+5y+30, or 12y+72.

Not sure exactly what you're asking for the third and fourth, but these are the first two simplified.

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You are correct. The answer is choice B.

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3 0
3 years ago
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