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Alex73 [517]
3 years ago
13

What is the value of b2 - 4ac for the following equation? 2x 2 - 2x - 1 = 0

Mathematics
1 answer:
Orlov [11]3 years ago
6 0
For you to make an equation a quadratic equation, you need everything to be on one side, so you add one to both sides. 

<span>2x^2 + 3x + 0=0 </span>

<span>a=2, b=3, c=0 </span>

<span>b^2-4ac (In the next step just plug in your variables) </span>

<span>3^2 - 4(2)(0) </span>

<span>9 - 8(0) </span>

<span>9 - 0 </span>

<span>Your answer=9</span>
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Solve 3t + 2 = 5t - 4
Talja [164]

Answer:

3

Step-by-step explanation:

3t + 2 = 5t - 4

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t = 6/2

t = 3

7 0
3 years ago
Read 2 more answers
Eunice wanted to save up for a mountain bike that costs £250. She baby-sits each week for 6 hours for £2.75 an hour, and does a
choli [55]

Answer:

Approximately 2 weeks

Step-by-step explanation:

Given data

Cost of bike=  £250

<em>Assuming she works for 6 days</em>

1.Babysitting

6*2.75=£16.5 per day

for 6 days

=16.5*6

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2. Saturday Job

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Total earnings for the week

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Hence it will take her

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Approximately 2 weeks to save up the amount

3 0
3 years ago
Im really not sure with my answer, please tell which is the correct choice.
I am Lyosha [343]

Answer:

the orange one

Step-by-step explanation:

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20 : 2 =

10

5 0
2 years ago
How do you factor 7+14
mote1985 [20]

You could factor a 7 out of 7 + 14 to get 7(1 + 2).

This would equal the same thing as 7 + 14, which is 21.

7 * 3 = 21.

21 can be factored like so:

1 * 21 = 21

3 * 7 = 21


5 0
4 years ago
What is the distributive property of 48 72?
aksik [14]
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8 0
4 years ago
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