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frutty [35]
3 years ago
5

HELP ASAP

Mathematics
2 answers:
Phoenix [80]3 years ago
5 0
Ur first gonna move that 3 to the other side
4x^2 + 16x = -3

so ur isolating the constant
Phantasy [73]3 years ago
5 0

Answer:

<h2>"Factor 4 out of the variable terms".</h2>

Step-by-step explanation:

The given equation is

4x^{2} +16x+3=0

Now, according to the problem, Maya is solving by completing the square.

The first step she needs to do is to factor 4 out of the variable terms,

4(x^{2} +4x)+3=0

Then, we move the constant to the other side

4(x^{2} +4x)=-3

Now, we divide the linear term by 2, and find its square power

x^{2} +4x+(\frac{4}{2} )^{2} =-\frac{3}{4} +4\\x^{2} +4x+4=\frac{16-3}{4} \\x^{2} +4x+4=\frac{13}{4}

Then, we factor the perfect square trinomial

(x+2)^{2}=\frac{13}{4}\\

Now, we solve for x

x=\sqrt{\frac{13}{4} } -2

Remember, a square root always has two solutions

x_{1}= +\frac{\sqrt{13} }{2}  -2\\x_{1}= -\frac{\sqrt{13} }{2} -2

Therefore, the first step Maya should take is "Factor 4 out of the variable terms".

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Beaker A contains 1 liter which is 15 percent oil and the rest is vinegar, thoroughly mixed up. Beaker B contains 2 liters which
Tanzania [10]

Answer:

Add 1.25 litres of oil.

Step-by-step explanation:

Contents in beaker A implies;

15% of oil in 1 litre = 0.15 litres of oil

So that, there are 0.15 litres of oil and 0.85 litres of vinegar in beaker A.

Contents in beaker B implies:

55% of oil in 2 litres = 1.1 litres of oil

So that, thee are 1.1 litres of oil and 0.9 litres of vinegar in beaker B.

Half of contents of B poured into A implies that beaker A now contains:

0.15 litres + 0.55 litres = 0.7 litres of oil

0.85 litres + 0.45 litres = 1.3 litres of vinegar

The percentage of oil in A now = \frac{0.7}{2} x 100%

                                                    = 35%

To increase the percentage of oil to 60%, then:

0.7 litres + 1.25 litres = 1.95 litres of oil

But the new total litres of the content in beaker A = 3.25 litres

So that;

\frac{1.95}{3.25} x 100% = 60%

Therefore, to produce a mixture which is 60% oil, add 1.25 litres of oil.

7 0
3 years ago
2% of the population suffers from the terrible disease conditionitis. The test for conditionitis comes back positive 98% of the
vlabodo [156]

Answer:

8% probability that he or she actually has the disease

Step-by-step explanation:

We use the Bayes Theorem to solve this question.

Bayes Theorem:

Two events, A and B.

P(B|A) = \frac{P(B)*P(A|B)}{P(A)}

In which P(B|A) is the probability of B happening when A has happened and P(A|B) is the probability of A happening when B has happened.

If a randomly chosen person is given the test and the test comes back positive for conditionitis, what is the probability that he or she actually has the disease?

This means that:

Event A: Test comes back positive.

Event B: Having the disease.

Test coming back positive:

2% have the disease(meaning that P(B) = 0.02), and for those, the test comes positive 98% of the time. This means that P(A|B) = 0.98

For the 100-2 = 98% who do not have the disease, the test comes back positive 100-77 = 23% of the time.

Then

P(A) = 0.02*0.98 + 0.98*0.23 = 0.245

Finally:

P(B|A) = \frac{0.02*0.98}{0.245} = 0.08

8% probability that he or she actually has the disease

6 0
4 years ago
True or False |-6| &lt; 2
andreev551 [17]

Answer:

false

Step-by-step explanation:

the absolute value of -6 is 6

6 is not less than 2

6 0
3 years ago
before his shopping spree, Ahab owned 11 hats. Then he bought 33 more hats. what is the ratio of hats purchased to the resulting
sleet_krkn [62]
Answer: 3:4
First step: 33 hats are purchased
Second step: for total number of hats you would do 33+11=44
Third step: simplify the ratio 33:44 —> 3:4
6 0
3 years ago
What you would do if Jesus came to your house.
postnew [5]

Answer:

Give him a Big hug and be so happy

7 0
3 years ago
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